This was quite an undertaking by authors Ed Sweeney and Fred M. Marks. They reported on practically every radio control system that came new onto the market in 1969 and printed the findings in the 1969 Annual edition of American Aircraft Modeler. That was still the era of galloping ghost systems with reeds, rubber band-powered escapements, and some of those newfangled things called transistors. By 1969, some of the transistors had graduated from germanium to silicon. The authors actually get into a little detail on the dual conversion receivers with their IF frequencies and selectivity - music to the ears of a radio guy.
From the R/C perspective, as the song goes, "These are the good old day," not the days of the old equipment shown here.
1969 Radio-Control Equipment Survey
(see page 1 for the story)
Comprehensive directory of all 1969 systems from single channel to full-house digital, with data on controls, circuits and cost.
Text by Ed Sweeney; commentary on digital by Fred M. Marks
Continued from Page 1
Single Channel Sequential Systems
ARISTOCRAFT DISTINCTIVE MINIATURES
314 Fifth Ave., New York, N. Y. 10001
Aristocraft single-channel sequential system is made on 27mhz, costs $69.95.
Transmitter has available, as option, Aristocraft Quadtrol pulse-counter stick-box giving sequential signals for rudder, elevator, and motor control. Pushbutton also usable on face of transmitter. 9v dry battery used. Power output about 200mw.
Airborne Package: Receiver Is relay superhet operating on independent 9v dry battery. Relay drives Aristocraft Ruddervator for rudder, elevator, and quick-blip motor speed change. Operates on 4½V dry batteries.
Special features are failsafe system designed for beginners; light, compact, easily mounted, dualfunction servo.
MODEL RECTIFIER CORPORATION
5300 21st Ave., Brooklyn, N. Y. 11204
MRC Futaba F66 is sequential rudder-only 27mhz system available at $39.95. Imported from Japan, sold and serviced by Model Rectifier Corp.
Transmitter is compact 100mw pushbutton-operated unit using 12v dry battery supply of 8 pen cells. Gives 6 hrs operation.
Airborne Package: Receiver is relayless superregen operating on same 3v pen cell supply with compound light-weight escapement for rudder control. Commands are: one pulse, right rudder; second pulse, left rudder. Rudder neutralizes between commands.
Special features are extreme light weight, suitable for Radio Assisted Free Flight models, and design for beginners.
MRC Futaba. F68 is sequential rudder-and-motorcontrol system on 27mhz at $69.95. Imported from Japan, sold and serviced by Model Rectifier Corp.
MRC Futaba F68
Transmitter is 150mw unit using 12v battery supply from 8 pen cells. Case is metal and circuit is more potent version of F66 unit. Operated by pushbutton microswitch.
Airborne Package: Receiver is relay superregen using independent 9v dry battery. Relay drives motorized sequential servo and quick-blip escapement. Servo and escapement use 4.5v from 3 pen cells. Mechanical output rotary wheel, 3 lb thrust.
Special features are servo mounting tray, design for beginners. Deluxe transmitter and superhet receiver available.
MRC Futaba F69 is deluxe sequential rudder-and-motor-control system with motorized actuators on 27mhz selling for $114.95. Imported from Japan, sold and serviced by Model Rectifier Corp.
Transmitter has three-position control stick, left, neutral, and right. Sequential keying by electronic encoder. Pushbutton microswitch with electronic quick-blip for motor speed changes. Output is over 150mw on 12v dry battery of 8 pen cells. 2 hrs operation. Case is metal, small-size, convenient operation. Power output and battery condition indicated by meter on face of transmitter.
Airborne Package: Receiver is 9v dry-battery-operated superhet with relay driving compound-action motorized sequential actuator for rudder control, second servo for motor control. Power supply 9v for receiver, 4.5v of 3 pen cells for servos. Rotary output on both servos, 3 lb thrust.
Special features are servo mounting tray and plug terminal, design for beginners, reliable electronic sequential operations.
Royal Combo #1
ROYAL ELECTRONICS CORP.
2101 So. Leyden, Denver, Colo. 80222
Royal Combo #1 is beginner's sequential system available on 27mhz at $97.30. Provides rudder-and-motorcontrol with motorized actuators. A deluxe system.
Transmitter is Echo with 200mw output, singlechannel tone. Uses 6v dry battery good for 20 hrs operation. Operated by pushbutton on face of transmitter.
Airborne Package: Receiver is Vangard 3v superhet with relay directly driving compound-action rudder servo and three-position motor control servo. Both servos have rotary output with 3 lb thrust. System uses 6 pen cell dry batteries. 5 hrs operation.
Special features are fully-wired system ready-to-use, inexpensive dry batteries, and powerful servo movement for large planes.
Royal Combo #4
Royal Combo # 3 is less-expensive sequential rudderand-motor-control system for $87.30 on 27mhz. Suitable for beginners.
Transmitter is dry battery-powered Echo unit, 200mw output, pushbutton operated, using 6v battery. Gives 20 hrs operation.
Airborne Package: Receiver is Saturn relay superregen unit on 3v, driving two sequential servos for rudder, and three-position motor control. Second servo operated by third position of first servo or by quick-blip. System operates on 6 pen cell dry batteries. Servos have rotary output 3 lb thrust.
Special features are inexpensive dry batteries, powerful servo movement, fully wired, ready-to-use. Royal Combo #4 is even less expensive set with only rudder servo and 4-cell airborne battery supply for $75.85, other parts as in Combo #3.
WORLD ENGINES, INC.
8960 Rossash Ave., Cincinnati, Ohio 45236
Controlaire, One-Channel Pulse
Controlaire Mule-Robot is rudder-only sequential system with optional extra-cost motor control available on 27mhz for $49.98.
Transmitter is pushbutton-operated Mule with 250 mw output into center-loaded antenna operating on 9v dry battery for 25 hrs continuous.
Airborne Package: Comprises battery pack of 3 pen cell dry batteries, plastic-cased receiver-servo unit, and motor control unit plugs into receiver-servo unit. Superregen receiver with transistor drive is used. Servos have rotary output with 1 lb thrust. Batteries give 3 hrs operation.
Special features are light weight, easy installation, inexpensive dry batteries, suitable for beginners, outof-sight range. Motor control costs additional $12.98, gives three engine-speed positions, and operates on third position of first servo.
O.S. Pixie Combo
O.S. Pixie Combo is sequential rudder-control system imported, sold and serviced by World Engines on 27mhz for $49.98. Uses motorized servos, optional extra-cost motor control servo available.
Transmitter has under 100mw output into centerloaded antenna. No license required for use. Operates on small 9v dry battery for one hour continuous. Operation by pushbutton microswitch. Convenient small size in plastic case.
Airborne Package: Superhet relay-receiver on 9v driving O.S. S103 rudder servo. Rotary output with 1 lb. thrust. Battery supply 4,5v of 3 pen cell batteries and 9v battery for receiver. Comes wired ready-touse. Motor control easily added with MI04 servo.
Special features are suitable for beginners, excellent range with low-power transmitter, optional motor control, light weight, small size. S 104M servo for $12.98 gives motor control.
Pulse Proportional and up to Three-Channel Digital Systems
ACE Commander RO Pulse
ACE R/C, INC.
203 West 19th St., Higginsville, Mo. 64037
ACE Commander RO Pulse is single-channel lightweight pulse system on 27mhz. Three versions: Baby Pack, $69.95; Standard Pack, $71.95; and Stamper Pack, $74.95. Differences are size/power of actuator.
Transmitter has 200mw power output to centerloaded antenna. Control by left-right stick. Battery 9v dry-type. Pulses are 5-50-95 left-neutral-right.
Airborne Package: Receiver is all silicone transistor superhet with double-ended output to drive dual-coil magnetic actuators. Operates on 2.4v up to 4v. Servo one of three sizes Adams magnetic actuators. Battery packs vary from 225mah to 500mah to 600mah depending on actuator size. One hour continuous use.
Special features are design for beginners and simplicity. Motor control may be added by high-rate detector.
ACE GG #2
ACE GG Pack #2 Is Galloping Ghost pulse system using Rand LR3 servo. Made on 27mhz for $109.95, also available in kit form.
Transmitter is ACE Jansson GG unit with 200mw output to center-loaded antenna. Bonner control stick gives rudder and elevator commands, pushbuttons give throttle control. Power is 9v dry battery, should last season.
Airborne Package: Receiver is Commander DE superhet relayless unit driving Dickerson GO switcher on which Rand LR3 servo, on-off switch and charging jack are mounted. Two 600mah NiCad batteries power system for over 1-hr operation. Charger not supplied.
Special features are usability of receiver and transmitter in dual-servo systems, light weight, simpl1city of system, and failsafe ability. Servo unit easy to mount.
AIRTROL OF ADRIAN
Box 392, Adrian. Mich. 49221
Airtrol R- III is rudder-only one-servo pulse system on 27mhz for light-weight, small planes. Sells for $69.50. Useful for beginners.
Transmitter puts out 250mw using 9v dry battery.
Keying is electronic. Spring-loaded lever controls rudder function.
Airborne Package: Receiver is relay superhet operating on own 3v pen cell batteries. Relay drives PAS-1 servo. Battery supply six pen cell dry batteries. Gives 3 hrs continuous operation.
Special features are light weight of system, and design for use by beginners. Inexpensive dry batteries throughout.
Airtrol GL-100 is small Galloping Ghost system designed for beginners at $99.50. Available on 27mhz.
Transmitter is compact, has single-gimbaled stick made by Airtrol, uses dry 9v battery, has 250mw output. Throttle command by full-on and full-off tone signals with two pushbuttons.
Airborne Package: Receiver is relay-superhet which drives Airtrol-made Galloping-Ghost servo. Battery supply is six pen cells, two for 3v receiver, four with center tap for the servo.
Special features are available lightweight rechargeable NiCad battery pack, minimum interaction of controls with this Galloping Ghost servo, and overall light weight.
633 Thompson Lane, Nashville, Tenn. 37204
Bonitron Super Sport
Bonitron Super Sport is highly developed single-channel pulse transmitter and receiver on 27mhz selling for $89.50. For use with Rand GG Pack or Dual Pack.
Transmitter has 250mw output using 9v dry battery.
Switch inside provides several operation modes; on-off for sequential servo systems, Galloping Ghost pulse, and high-rate dual-servo pulse systems. Widths, and positions of pulses, fully adjustable.
Airborne Package: Receiver is double-tuned-frontend superhet designed for high pulse rates and excellent noise rejection as in pulse-servo operation. Output is relayless for driving decoder units as in Rand packs, operates directly from their batteries at 3.6-4.0v.
Special features are versatile usage, and electronic centering, range controls. Receiver highly selective.
CANADIAN RADIO CONTROL ELECTRONICS
38 Gardsman Rd., Thornhill, Ontario, Can.
CRC Digital 3 is 3-function control system sold with two servos, receiver, transmitter, airborne battery pack and charger. Dry battery used in transmitter. Third servo available separately. System mainly for beginners, glider, boat, and car enthusiasts needing only two functions. Price $280 in Canada, somewhat less in US. 27mhz only.
Transmitter has full three channels available on the two-axis Orbit control stick and separate throttle lever. Power output about 600mw with optional 9.6v NiCad battery pack (extra cost item). Pulse at neutral 1.9ms with variation of .5ms. Frame rate 22ms.
Airborne Package: Receiver is all-FET-transistor superhet, same as in CRC 4-6 system but using only half of the integrated-circuit decoder. Three complete functions available. Operates CRC amplified Orbit PS3 servos having dual-linear and rotary outputs with 4½ lb thrust. Center tapped 4.8v battery pack gives 4 hrs operation.
Special features are low parts-count in receiver, charger for airborne battery pack in transmitter, servo-mounting bracket.
CANNON ELECTRONICS, INC.
13400-26 saticov St., North Hollywood, Calif. 91605
Cannon 509 is single-channel combo of transmitter and receiver only. Costs $28.50 and $32.50. Receiver also made in kit form at $24.50. Units on 27mhz only.
Transmitter is pushbutton-operated but easily adapted to pulse operation with extra-cost Cannon Pulsi-Tran unit. Uses 9v dry battery, operates one full season, has 500mw output.
Airborne Package: Just superhet receiver. Available in either of three configurations: 1) relay output, 2) relayless for driving Rand Packs, or magnetic actuators, 3) with transistorized drive for Galloping Ghost servos. Receiver operating voltage adjustable for 3 to 4.8v. Has single-tuned front-end and Miller Strip for IF tuning, amplification, and AGC.
Special features are use of receiver to drive decoder systems such as Rand Paks with Galloping Ghost or high-rate transmitters.
Cannon C526-M3 is a 3-function system for $179'.95' as kit, or built for $225. Produced on 27mhz and 50mhz.
Transmitter comes with Kraft control sticks, less those components for 5-channel operation. Has 800mw output on 9.6v NiCad battery supply of 500mah capacity giving 4 hrs operation. Neutral pulse is 1.5ms, frame rate 90cps.
Airborne Package: System uses three channels of the M5 system. Has double-deck construction with double-tuned front end. Three KPS-9 servos come with system, but KPS-10 servos can be had at extra cost, or built from kits for $21.50 each. 4.8v NiCad pack powers unit with 4 hrs operation.
Special features are primarily the same as for the M5 system, and expandability of M3 to have all five functions.
CITIZEN-SHIP RADIO CORPORATION
810 E. 64th St., Indianapolis, Ind. 46220
NPT & SSH-P are combination transmitter and receiver, available without servos or batteries, on 27mhz band at $69.95 and $34.95 respectively, Matched sets for Galloping Ghost and dual-servo pulse systems.
Citizen-Ship NPT pulse transmitter
Transmitter is a single-stick unit with buttons for trimmable throttle function. Switch inside changes pulse rate for either Galloping Ghost or dual-servo pulse systems. Has 300mw output, uses 9v dry battery. Provides 12 hrs operation.
Airborne Package: Receiver is a single-ended output superhet operating on 2.4 to 4.8v. Is set up for 3.6v for use with the Rand GG Pak or the Rand Dual Pak, obtained separately.
Special features are switchable rate and built-in charger for Rand system's NiCad battery packs.
DP-1 is single-servo rudder-only digital-feedback system made on 27mhz band only. Costs $99.95.
Transmitter is small unit with single control lever for rudder control. puts out 125mw using 9v dry battery.
Airborne Package: Receiver is superhet which directly drives APC-2 servo mounted on printed-circuit board with on-off switch and few other electronic parts. Feedback servo has 4 lb thrust from one linear output arm. Battery supply is 4.8v NiCad or 4 pen cell dry batteries. NiCads are light weight 250mah.
Special features are simplicity .and reliability as a refined single-function system. Useful in gliders, boats, and cars where one powerful control is needed.
C-S DP2 is two-function digital set for beginners, glider flying, boats, or cars, on 27mhz. Costs $199.95.
Transmitter has two single-action sticks, 350mw output, using Single 9v dry battery. Gives about 12 hrs operation. pulse neutral 1.5ms at frame rate of 60 cps.
Airborne Package: Uses small double-tuned frontend superhet operating two DMS plastic-case C-S servos. These have 4½ lbs thrust and a full 5/8" movement. 4.8v NiCad pack supplies power for 3½ hrs continuous.
Special features are light weight and compact size for small-engine planes or gliders or small boats, but with powerful servos. Airborne weight is 9 oz.
C-S DP3 is three-function digital system on 27 and 72 mhz at $274.95 and $299'.95 respectively. Beginner's unit particularly useful in small almost-full-house-size planes.
Transmitter operates on inexpensive 9v dry battery giving about 12 hrs operation. Power output is 350mw average. Control sticks are rudder-elevator C-S unit and throttle level. Pulse at neutral is 1.5ms. Frame rate is 60 cps.
Airborne Package: Units are three DMS servos, dual-linear and one rotary output, giving 4½ lb thrust; sharp-tuning superhet receiver, and 4.8v NiCad battery pack, good for 3 hrs continuous operation.
Special features are 14 oz installed airborne system, dry battery in transmitter, fast-action servos using integrated circuitry for more reliability.
EK PRODUCTS, INC.
3233 W. Euless Blvd., Hurst, Texas 76053
Digi-Ghost DG-1 by Logictrol
Digi-Ghost DG-1 by Logictrol is Galloping Ghost system using single Rand LR-3 servo. Dual-servo system DG-2 offers independent rudder and elevator controls. DG-1 is $135, DG-2 $180. Throttle control by goaround function. On 27 mhz only.
Transmitter is 400mw output unit using 9v dry battery. Stick assembly open type with electronic trims and pushbuttons for engine speed changes. DG-1 neutral pulse for elevator control 7cps, DG-2 elevator neutral 12.5cps. Pulse widths 35-65 extremes.
Airborne Package: Receiver is small superhet in tough plastic box housing servo-plug block: System operates on 3.6v NiCad pack. Dual-servo system retains elevator command during engine speed changes. Rand actuators used in both systems.
Special features are light-weight airborne system suitable for beginners; DG-1 can be made into DG-2 at factory at extra cost for conversion. Digital type signals, not single-channel, are used.
Logictrol XL-3 is a three-function system made on 27mhz only. A digital system for beginners at $250.
Transmitter uses EK open stick assembly with electronic trim, puts out 400mw, uses 9v dry battery. NiCad transmitter battery pack is extra-cost option which gives 2-1/2 hrs continuous operation. Throttle command is via two pushbuttons. Neutral pulse is 1.5ms. Frame rate variable.
Airborne Package: Receiver is plastic-cased superhet with integral servo plug block. Servos are miniaturized EK dual-linear types with 3½½ lb thrust. Battery system non-center-tapped 4.8v NiCad pack.
Special features are receiver-and-servo mount bracket. all silicone transistor circuitry in airborne packages.
703 Slate N. W., Albuquerque, N. M. 87101
Galaxy 3. is a all proportional three channel system available on 27mhz and 50mhz for $249.50.
Transmitter uses Kraft-Hayes stick assembly for rudder and elevator controls and a. trim lever for the third function. Power output is 800mw using 7.2v NiCad battery giving 10 hrs operation. Pulse at neutral is 1. 7ms and variation is plus and minus .6ms with frame rate of 34-40ms.
Airborne package uses the same superhet receiver as in Galaxy 5 system and the same Galaxy GS3 servos. 4.8v NiCad pack gives 3 hrs operation, servos have dual-linear output with 4 lb thrust. Servos use non-center tapped battery source.
Special features are optional Magnavac servos, suitable for high-vibration and stress conditions such as in racing power boat or race car. These units have Inductive feedback which involves no physical feedback contact. Sets are hand crafted and test flown before shipment.
HALLCO PRODUCTS, INC.
Hallco 123 GG
416 East Water St., Urbana, Ohio 43078 Hallco 101 is pulse rudder-only system on 27mhz available complete for $69.95.
Transmitter has 300mw output into center-loaded antenna, left-right control stick, and uses 9v dry battery. Pulses are 5-50-95 at average 5 pulses per second, for left-neutral-right commands.
Airborne Package: Receiver is double-ended-output superhet operating on 2.4v, driving Adams actuators with single or dual coils. Battery pack 225mah or 500mah depending on actuator.
Special features are design for beginners, lightweight package at 2½ oz, with Baby actuator and 225mah batteries. For tiny planes up to .049 size.
Hallco 123 system is Galloping Ghost unit on 27mhz and 50mhz selling for $109.50.
Transmitter has 300mw output operating on 9v dry battery. Uses Bonner control stick for rudder and elevator commands, spring-centered lever for throttle changes. Output through center-loaded antenna.
Airborne Package: Receiver is relayless superhet mounted on common tough glass-epoxy board with Rand LR3 Galloping Ghost servo, on-off switch, and charging jack. Battery supply is center-tapped 4.8v 500mah NiCad pack. 1.8 hr operation per charge.
Special features are failsafe mode, fully wired, easyto-mount unit. Expandable for independent elevator servo without modifications. Transmitter switchable to either low or high pulse rates. Designed for beginners. Just transmitter and receiver also available as combo for $89.95 to operate magnetic actuators and decoder systems.
Hallco 123 SS
Hallco 123 SS and 123TA. are dual-servo pulse systems giving rudder, elevator, and trimmable motor control, selling for $139. Made on 27mhz and 50mhz bands.
Halllco 123 TA
Transmitter is switchable-rate dual-purpose pulse transmitter with Bonner control stick for rudder and elevator commands. Spring-centered switch operates motor function. Power output is 300mw into centerloaded antenna. Power supply is 9v dry battery.
Airborne Package: Receiver is solid-state superhet mounted with Rand LR3 and HR1 servos side-by-side, including charging jack and on-off switch; or available with receiver and LR3 Galloping Ghost servo (and switch and jack) but with removable elevator servo located in tandem. 4.8v NiCad battery supplies power.
Special features are use of TA system as either small Galloping Ghost system or dual-servo pulse system. Failsafe mode, convenient mounting and small size.
Hallco 20B is elevator-function unit to be used as an add-on function to rudder-only and Galloping Ghost systems which use 4.8v center-tapped battery system. Used as elevator function in Hallco 123 TA system. Sells for $30.00 and for $44.50 with 1000mah 4.8v battery pack.
Receiver servo system not altered to use Hallco 20 servo. Operates at rates of 10 (up elevator), 16 (neutral) and 22 (down elevator).
Special feature is universal usage and as extension to Hallco Galloping Ghost systems.
MIN-X RADIO, INC.
8714 Grand River Ave., Detroit, Mich. 48204
Min-X SH-DRT is a combination single channel 27mhz pulse transmitter for Galloping Ghost and high rate Dual-Servo systems and a small size relay equipped superhet receiver. $99.50.
Min-X SH-DRT and charger
Transmitter has 350mw output with center-loaded antenna. Unicentering Min-X control stick with trims. A lever switch is provided for throttle operation with solid on-or-off tone. 9v dry battery gives 10 hrs operation.
Airborne package is relay-equipped superhet receiver which is set up for 3.6v operation. Relayless version for operating Rand packs is available on special order. This receiver is unusual for single channel in that it is AGC equipped.
Special features are availability of 9.6v NiCad pack for transmitter and dual rate charger for receiver and transmitter packs. A deluxe receiver, which has specially sharp tuning and tone detector is available as combo with special transmitter for $114.95.
NAMCO-NORTH AMERICAN HOBBIES
7423 Bacon Rd., Petersburg, Mich. 49270
NAMCO Rogue-Racer System
NAMCO Rogue Racer control system on 27mhz is designed for electric powered RC car racing and using a chassis made of strong printed circuit board. Available built up with car for $129.95 and in various parts kits.
Transmitter uses two control sticks, right is springcentered steering stick, left is up-and-down throttle stick. Full low throttle also gives dynamic braking for quick stops. Plug-in crystals allow easy frequency changing without retuning. System is pulse singlechannel proportional rate and width detection. 9v dry battery gives 50 hrs operation. pulse widths are left 80%, neutral 5~%, and right 20%. Speed control Is variable between 4cps slow speed and 16cps fast speed.
Airborne Package uses a 3v superhet relayless receiver with plug-in crystal for easy frequency changing without retuning. Relayless switcher operates pulse proportional steering and rate change detector operates drive motor and permits reverse-direction drive.
Special features are availability of less expensive versions of the system and add on components to update to complete system. Choice of car body styles, coupe 01' roadster. Up to five may race at one time.
RAND MANUFACTURIUNG CO.
8909 Hubbell, Detroit, Mich. 48228
Rand GG Pak is servo and battery system only, to be operated with any Galloping Ghost transmitter and 3.6v PNP output receiver, or receivers with relay outputs. Price is $39.90 all wired ready for use.
Airborne Package: System comprises your single channel receiver driving the Rand Pak. Batteries are non-center-tapped 3.6v NiCads of 600mah size. Servo is amplified LR-3 for Galloping Ghost control of rudder, elevator, and motor.
Special features are overall light-weight system, pushrod operation of control surfaces. expandability to dual-servo system. Many manufacturers produce companion transmitters and receivers to operate Rand systems, some include Rand units.
Rand Dual Pak is pulse-proportional dual-servo single-channel system complete with two servos, wiring harness, and battery pack only. To be operated with your receiver and transmitter which must be capable of fast pulsing and relayless receiver output.
Rand LR3 GG Actuator
Airborne package operates on 1.2ah NiCad cells giving about 1 hr operation. Receiver will also use same 3.6v as servo pack. In operation servos wiggle, cycle around with full-on or full-off signals. Throttle control by go-around action of rudder servo and gives four pushbuttons.
Special features are servo mounting tray, fail-safe operation such that engine goes to low motor and rudder and elevator have effective neutral command. Separate battery packs available for more flying per day. Rudder servo may be used separately for Galloping Ghost operation.
ROYAL ELECTRONICS CORP.
2101 S. Leyden, Denver, Colo. 80222
Royal Combo #5 is Galloping Ghost pulse system for $119.95 available on 27mhz band. Complete with Rand GG Pack.
Royal Combo for pulse
Transmitter is GG-1, a pulse unit with Bonner control stick, two pushbuttons for motor control, 300mw output, using 9v dry battery.
Airborne Package: Receiver is SH Pioneer 2 superhet with all-silicone transistor circuitry which operates on Rand servo 3.6v battery pack. Relayless output direct to Rand GG Pack.
Special features are expandable system to operate with Rand Dual Pak also, with factory modification. Receiver can operate other decoder systems.
Royal Combo 6 is dual-servo pulse system on 27mhz available with Rand Dual Pak for $166.95. Gives independent rudder and elevator control with trimmable throttle.
Transmitter is GG-3 pulse unit using Bonner stick, and buttons for engine controls. Has 300mw output using 6v dry battery.
Airborne Package: Receiver is superhet relavless which directly drives Rand Pak, uses same 3.6v NiCad batteries as servos. SH Pioneer 2 receiver has a11- silicone circuit. Transistors throughout.
Special features. Receiver can also drive Rand GG pack, transmitter convertible at factory to do this, System will also operate other decoder systems.
SIMPROP-NELSON MODEL PRODUCTS, INC.
P. O. Box 2027, Dublin, Calif. 94566
Simprop Dig 2+1
Simprop Digi 2+1 is a 3-functron all-proportional system imported from Germany, sold and serviced by Nelson Products. Available on 27mhz and 72mhz at $279.50.
Transmitter has 350mw output on 14.4v NiCad battery supply. Control sticks are: elevator function, left stick; rudder function, right stick; third function, middle lever. Frequency is instantly changeable without retuning by changing crystals. Case design is unique. Antenna. stores inside case when not in use, projects upward in use. Neutral pulse 2ms. Frame link 20ms.
Airborne Package: Receiver is very sharp-tuning superhet with instantly changeable frequency by changing crystals. Simprop servos have rotary-disc output with 5 lb thrust. Battery supply center tapped 4.8v NiCad. 5 hrs-continuous operation per charge.
Special features are changeable frequency by changing crystals, teacher-student system, special car or boat system available, and provision for long-duration battery pack for special uses. Crystal sets cost $12 for pail' of transmitter and receiver rocks.
11500 Tenn. Ave., Los Angeles, Calif. 90064
Testor "Skyhawk" RC plane and control system on 27mhz cost $99.95 and $79.95 respectively. Plane is plastic-and-foam low-winger designed for beginners. Control is rudder-only proportional. Control system only. has optional-at-extra-cost throttle function.
Transmitter is dry-battery operated unit with 250- mw output into center-loaded antenna. 12v used, using pen cell batteries giving 6 hrs operation. Control stick is mechanically trimmed, left-right unit by Testor. Pulse widths: left 5%, neutral 50%, right 95%, operating magnetic actuator at receiver.
Airborne package includes superhet receiver housed in plastic case with two 500mah NiCad batteries operating Adams dual-coil magnetic actuator. Receiver uses all-silicone transistor circuit with excellent range for out-of-sight flights. System uses 2.4v batteries for both receiver and actuator, giving 2½ hr- operation.
Special features for control system not purchased with plane is STS#1 motor control three-position servo for $18.95. NiCad pack for transmitters costs additional $14.50 at factory.
Testor "Mustang'" is control system and Ford Mustang model car with steering and stop-go controls. On 27mhz with five frequencies available for $99.95.
Transmitter has less than 100mw power output and may be operated by persons not having Citizen's Band License. Pulse single-channel transmitter uses 12v dry batteries consisting of pen cells. Signals are: left 10%, neutral 50%, and right 90% at pulse rate of 5cps. Two-speeds operation is offered with switch on car.
Airborne package: Uses 3.6v superhet receiver operating on same 1.2ah NiCad batteries as steering actuator and drive motor. Sensitive receiver has good range with low-power transmitter. Adams dual-coil magnetic actuator used for steering. One-hour operation per charge. Additional power packs available.
Special features are rechargeable power pack for transmitter at $14.95, charger for It $6.95. Additional packs for drive and receiver also available.
WORLD ENGINES, INC.
8960 Rossash Ave., Cincinnati, Ohio 45236
Controlaire One-channel Pulse System is ultra-light set on 27mhz ideal for tiny planes or beginners at $79.98.
Transmitter is 250mw Mule with pulser operated by RC Craft one-function propo stick. Pulses are 20%- 50%-80% for left, neutral, and right. Uses one 9v dry battery giving 20 hr operation.
Airborne Package is grommet-mounted PC board including an Adams large, single-coil magnetic type actuator and superhet receiver. Two wires lead out to two-cell NiCad pack, 2.4v at 600mah, and switch. 2 hr operation available.
Special features are very lightweight, easy-to-install package. Even lighter installation possible by optional Baby Adams Actuator and 250mah batteries. This is a do-it-yourself operation, though.
Controlaire GG is Galloping Ghost system complete, less batteries. Available for $99.98 on 27mhz.
Transmitter is GG pulse unit with O.S. two-axis stick assembly and pushbuttons for motor control operation. Power output is 250mw. 9v dry battery power. 20 hr operation available.
Airborne Package: Uses relay-equipped SH-I00 receiver, a six-cell battery box, and Controlaire Galloping Ghost servo which is mounted with its electronic switcher, on-off switch, and plugs for battery and receiver on single compact PC board with grommets for mounting. 500mah NiCads recommended, but dry batteries will work it separate cells are used for receiver.
Special features are NiCad packs available at factory for extra cost. Rate detector, switch, and plug kit costs $14.98, or built for $19.98, to expand system to dual-servo operation. Add-on switch for transmitter rate conversion costs ,$2.98 (in kit form). Additional servo costs $11.98.
O. S. 2 and 3 function proportional digital systems are imported from Japan, sold and serviced by World Engines. On 27mhz only, available without batteries for $149.98 and $189.98 respectively.
Transmitter uses 12v dry battery, has 630mw output into center-loaded antenna. Pulse at neutral is 1.6ms, frame rate 60cps. O.S. two axis stick and throttle lever provide two or three controls depending on whether or not elevator movement is a used control. About 12 hrs flying are available on dry battery.
Airborne Package: Uses two or three plastic miniature 0.5. servos and single-deck superhet receiver. Battery box holding four pen cells or a 4.8v NiCad batteries is supplied, less the batteries. Servo thrust is 4 lb from rotary output.
Special features are optional NiCad packs for transmitter and receiver, and chargers.
Full-House Multi Digital Proportional Systems with Four or More Controls
AIRTROL OF ADRIAN
Box 392, Adrian, Mich., 49221
Airtrol DG-IV is 4-channel digital set available on 27mhz only for $299.95.
Transmitter uses O.S. control sticks in either twostick mode. Power output is 250mw into center-loaded antenna using 9.6v NiCad pack. Gives 3 hrs. operation. Charger in transmitter case has transformerisolated circuit. Encoder free-running multi with series of ½-shots giving pulse width at neutral of 1.7ms with variation of .6ms plus and minus. Frame link 15.5ms.
Receiver superhet with double-tuned front-end, mixer, and two IF stages. AGC from signal detector applied at 1st IF. Sensitivity 4mv for full control. Selectivity 4kc at 10db down. Decoder open ringcounter with discrete components, on separate deck from receiver. Output is negative pulse to servos.
Servos - Controlaire S4 units having single rotary output, weight 1.75 oz, 3 lb thrust. Servos use centertapped 4.8v source.
Airborne weight with four servos and standard 500- mah battery pack 14½ oz, 3 hrs operation.
Special features overall small size and light weight.
Mounting brackets and clips are available for Controlaire servos. Stick assemblies use long-handled levers with mechanical-electrical trim on each function.
CANADIAN RADIO CONTROL ELECTRONICS
38 Guardsman Rd., Thornhill, Ontario, Can.
Canadian, CRC 4-6
CRC Digital 4-6 is 4- or 6-function system on 27mhz or 50mhz bands. Imported by deBolt Model Engineering Co. Price In Canada $465, in US, $410 for the basic 4 channel set. 2 additional extra-cost channels available at factory.
Transmitter has 600mw output on 9.6v 500mah NiCad pack giving 4 hrs operation. Encoder free-running multi with ½-second-shots, pulse at neutral 1.9ms with variation of plus or minus .5ms. Frame link 22ms. Control sticks Orbit gimbaled units with trims on each function.
Receiver is distinctive superhet in that it uses FETs throughout. Because of FETs only one front-end tuning is used along with mixer and two IF stages. AGC is single-level type, voltage taken from second detector and applied at mixer, 1st and 2nd IF stages. Again because of FET's, sensitivity is not directly measurable, but equivalent to less than 1mv for full control. Selectivity 3kc at 3db down, 10kc at 14db down. Decoder a dual-shift register which is used twice for each frame to give 4 and 6 functions. Decoder comprised of integrated circuits with discrete component for outputs to servos, which are negativegoing pulses.
Servos are Orbit PS3 units with CRC amplifiers, weight 2 oz each. Dual-linear and rotary output of more than 4½ lb thrust. 4.Bv center-tapped batteries.
Airborne system with 4 servos weighs 14% oz. Battery pack 500mah 4.8v.
Special features are low receiver parts count because of FET transistors, improved sensitivity and selectivity. 4-channel set expandable to 6 at factory. 18O-degree servo and mounting brackets also available.
CANON ELECTRONICS, INC.
13400-26 Saticoy St., North Hollywood, Calif. 91605.
Cannon S5K and M5
Cannon C525-S5K is standard-version 5-channel system on 27mhz and 50mhz for $199.95 in kit form and $295 built up.
Transmitter is two-stick unit with Kraft stick assemblies throttle left or right. 800mw output with 9.6v NiCad battery giving 4 hrs operation. Encoder is ring-counter using 3 Integrated circuits - 2 for series of 1-shots and one for pulse forming. Pulse width at neutral 1.5ms and variable plus and minus .5ms. Frame rate 70cps.
Receiver is superhet with double-tuned front-end, mixer, and two IF stages. Triple-level AGC, with swamping front-end diode, takes voltage from signal detector and applies it to mixer, and both IF stages. Sensitivity 2mv for full control. Selectivity 2kc at 3db down, 10ke at 30db down. Decoder is open shift register using SCS's sending positive pulse to servos. Construction of receiver is single-deck.
Servos are choice of KPS-9 or extra-cost KPS-I0 and KEK Mini-Mites with Cannon amplifiers, using 4.8v center-tapped battery. KPS-9 has capacitive feedback, weighs 2.5 oz, has dual-linear and reverse rotary output with 3½. lb thrust. KPS-I0 is miniature unit, weighs 1.75 oz, rotary output, has 3% Ib thrust. KEK servo has dual-linear output of 3½ lb thrust, miniature size weighs 1.75 oz. Miniature servos feature integrated-circuit amplifier.
Airborne weight with 500mah batteries and small servos is 13 oz. With larger KPS-9 servos, weight is. 16 oz. With extra cost 225mah battery and small servos weight is 12 oz. 4 and 2 hours operation respectively.
Special features are design for kit building, integrated circuits, mounting bracket for servos, and deluxe version with gold-plated Cannon plugs, smaller servos slight extra cost, extra servos available in kit form at $21.50. Single-stick transmitter on special order. System C526-M5 is overall miniature version with smaller double-deck receiver and same other components costing $209.95 kit and $305 built.
CITIZEN-SHIP RADIO CORPORATION
810 East 64th se., Indianapolis, Ind. 46220
C-S DP4 is 4-functlon digital outfit on all frequencies, $374.95 on 27mhz, $399.95 on 50mhz and 72mhz.
Transmitter uses new gimbaled-enclosed CitizenShip control sticks with trims on all controls. Throttle right or left. Power output averages 350mw depending on frequency band. 9.6v NiCad pack gives 4 hrs operation. Encoder free-running multi with series of ½-shots, giving pulse at neutral of 1.5ms and variation of plus and minus .5ms. Frame rate 60cps.
Receiver is double-tuned-front-end superhet with RF amplifier. Dual-level AGC used with voltage from second detector applied to mixer and 1st IF stages. Sensitivity 3mv for full control. Selectivity 20ke at 60db down, 10kc at 12 db down. Decoder a semi-keyed ring-counter using integrated circuits. Pulses to servo negative-going.
Servos are new plastic-case Citizen-Ship units weighing 2 oz each, dual-linear and rotary outputs with 4~ lb thrust. Operate on center-tapped 4.8v source.
Airborne weight, complete with four servos, 16 oz.
Battery pack is 500mah button cells 4.8v giving 2½ hrs operation.
Special features are overall small size and parts interchangeable with older Citizen-Ship systems. These servos, also available for all other brands of R/C gear, are fast-acting with hard-molded pots. Similar 6- function version available in Spring.
C-S DP5 is 5-channel digital set with slightly larger receiver and different transmitter from DP4 system, available same price, $374.95 on 27mhz, $399.95 on 50mhz and 72mhz.
Transmitter uses new-style C-S control sticks with electronic-mechanical trims on all basic functions. 350mw output on 9.6v NiCad pack gives 4. hrs operation. Encoder free-running multi-vibrator with series of ½-shots giving pulse neutral of 1.5ms and variation of plus and minus .5ms. Frame rate 60cps.
Receiver is two-deck construction with receiver on top. Superhet with two front-end tuning stages and RF amplifier with mixer and two IF stages. AGC from second detector applied to mixer and first IF stages. Sensitivity 3mv for full control. Selectivity 20kc at 60db down, 10kc at 12db down. Decoder semikeyed ring-counter with discrete components, output negative pulse to servos.
Servos are C-S DMS units, dual-linear and rotary output. Each weighs 2 oz, operates on center-tapped 4.8v source. Thrust 4½ lb, servos quite speedy.
Special features are availability of extra or fifth channel included at no extra cost, but with slightly larger two-deck type receiver. Smaller 4 channel receiver can be used with 5 channel set. Servos can be ordered for 180-degree rotation at extra. cost for use as flap or landing gear on fifth channel.
W. S. DEANS, CO.
8512 Gardendale, Downey, Calif. 90242
DP5-2 and SP5-2 are 5-function systems, two-stick and single-stick respectively. Dual stick $349, single stick $410. 27mhz and 50mhz bands.
Transmitter uses modified Bonner stick assemblies with metal handles and smooth trims. Power output 800mw using 9.6v NiCad pack giving 3 hrs operation. Encoder uses free-running multi with series of 1 shots and variable frame rate. Pulse at neutral is 1.4ms with plus and minus 7.6ms. Frame link is quite fast at 7.6ms with all controls at neutral.
Receiver is unusually compact but of conventional design with double-tuned front end, mixer, and two IF stages in superhet part. Sensitivity better than 4mv for full control. Selectivity 2kc at 6db down. Decoder is open ring-counter using SCS's, giving positive pulses to servos.
Servos either Orbit PS3 with Deans amplifier weighing 2 oz each, with dual-linear and rotary output, or Orbit PS4 servos with Deans amplifier weighing 1.25 oz, and having single-rotary output. Both use non-centertapped battery source of 4.8v.
Airborne weight with four PS3 servos and 500mah battery pack 14 oz; with light-weight battery pack of 250mah and four PS4 servos is 8 1/2 oz. Standard 500mah 4.8v NiCad pack gives 2 1/2 hrs operation.
Special features are 180-degree servo for flaps or retract gear, one less lead in wiring harness because of non-tapped battery system, and overall light weight. Expandable to 8 channels.
DP8-2 and SP8-2 are 8-function systems, two-stick and single-stick, $475 and $490 respectively. On 27mhz and 50mhz.
Transmitter uses modified Bonner stick assemblies with metal handles and smooth-action trims. Power output is 800mw using 9.6v NiCad pack. Gives 3 hrs operation. Encoder free-running multi with series of 1 shots, variable frame rate. All controls neutral, frame rate 11.8ms. Pulse neutral is 1.4ms, variable plus and minus .5ms.
Receiver is superhet with double-tuned front-end, mixer, two IF stages. Triple-level AGC used, taking voltage at last IF and applying it at mixer, 1st and 2nd IF. Sensitivity is 4mv for full control. Selectivity 2kc at 6db down. Decoder is open ring-counter using SCS's, positive pulses to servos.
Servos will be choice of either Orbit PS3 or PS4 units with Deans amplifiers. Weights 2 oz and 1.25 oz respectively. Both use non-center-tapped battery source of 4.8v. PS4 has single-rotary output.
Airborne weight with 500mah battery pack and four PS4 servos is 10 1/2 oz, with 250mah light-weight pack, only 81/2 oz. Weight with PS3 servos 14 oz with 500mah pack. 3 hrs operation with 500mah pack.
Special features are extreme light-weight, introduction of tiny Orbit PS4 servos, 180-degree servo, and buddy box for flight training available at extra cost. 5-channel set expandable to 8. Non-centertapped battery pack improves reliability and simplifies wiring harness.
EK PRODUCTS, INC.
3233 W. Euless Blvd., Hurst, Texas 76053
Logictrol-III 5 is system with 5 functions available in either two-stick arrangement or single-stick unit on all modeling frequency bands for $395 and $420 respectively.
Transmitter has 600mw output on 27mhz and 50mhz using 10v battery pack, and 300mw output on 72mhz with 12v battery pack. In both cases 2 1/2 hrs operation available. Encoder is variable-rate free-running multi with series of 1/2-shots as shift register. Pulse at neutral 1.5ms with variation plus and minus .5ms. Frame rate changes with controls commands, giving more information pulses per second.
Receiver, a superhet using double-tuned front end with two RF amplifiers, mixer, and two IF stages. AGC front detector controls one RF stage and the first IF. Sensitivity at 1 1/2mv for full control. Selectivity 2 1/2kc at 40db down. Bandwidth 2kc at 6db for 1/2 signal. Decoder is open shift-register using SCS's, negative pulse to servos.
Servos dual-linear-output KEK Mini-Mite units using 4.8v battery without centertap, thus eliminating one lead throughout wiring harness. Thrust 3 1/2 lb. Weight 1.85 oz.
Airborne weight with 4 servos is 13.3 oz. 500mah flat-pack NiCads give 3 1/2 hrs operation.
Special features are plug terminal-block at receiver case to eliminate wiring harness confusion, improve reliability. and safety-lock rake for terminal block. Optional items include powerful 180-degree servo for flaps and retract landing gear, electronic brakes, servo mounting bracket which holds four servos, receiver which has mounting terminals using grommets, as is done with servos. Receiver and servos in tray, airborne system easily moved plane to plane. 5-channel system factory expandable to 7.
Logictrol III 7 and 5 Single Stick
Logictrol-III 7 is 7-control system in either dual-stick arrangement or with single-stick transmitter. On all model frequencies at $445 and $470 respectively.
Transmitter uses open-race no-back-lash Logictrol control stick assemblies with individual pot trim control. Power output 600mw on 27mhz and 50mhz using 10v battery pack, 300mw output on 72mhz with 12v battery pack. Both give 2 1/2 hrs operation. Encoder variable-rate free-running multi with series of 1/2-shots as shift-register. Pulse at neutral 1.5ms, variable plus and minus .5ms. Frame rate changes With control commands to have more information transmitted per second.
Receiver uses double-furred front-end with two RF amplifiers, mixer, and two IF stages giving sharp-tuning superhet. AGC from detector controls one RF stage and 1st IF stage. Sensitivity 1 1/2mv for full control. Selectivity 2 1/2kc at 40db down, bandwidth 2kc at 6db for 1/2 signal. Decoder circuit open shift-register using SCS's. Negative pulse to the servos.
Servos KEK Mini-Mite units having dual-linear output of 3 1/2 lb thrust. Amplifier design does not use centertap from 4.8v NiCad battery pack thus eliminating one lead throughout wiring harness. Servo weight is 1.85 oz.
Airborne weight with four servos is 13.5 oz using the 500mah NiCad pack. 3 1/2 hrs operation is normal, however. system continues to operate even with one dead cell in pack.
Special features are plug terminal-block at receiver case to eliminate wiring harness confusion, improve reliability, and a safety-lock rake to prevent inadvertent unplugging. Optional items include powerful 180-degree servo for flaps or retract gear, electronic brakes, and servo-and-receiver mount bracket. Receiver has mounting lugs like servos. Receiver and three or four servos in tray, airborne system moved easily plane to plane.
F & M ELECTRONICS, INC.
137 Vermont N.E., Albuquerque, N. M. 87108
F & M Quasar is 5-function system on 27mhz, 50mhz and 72mhz bands in kit or built-up form for $230 and $400 respectively.
F & M Quasar
Transmitter uses open control sticks with no-neutral-back-lash and all-electronic trim on basic controls. Has 700mw output on 9.6v NiCad pack giving 3 hrs operation. Encoder free-running multi with series of 1/2-shots as shift-register. Pulse at neutral is 1.5ms, variable plus and minus .5ms. Frame rate 70cps.
Receiver superhet with double-tuned front-end, one RF amplifier, mixer, and two IF stages. For very sharp tuning a larger-than-usual size IF can is used. AGC developed from signal detector is feedback to RF amplifier and 1st IF stage. Sensitivity 2mv for full control. Selectivity 2kc at 6db down, 4kc at 18db down, 10kc at 29db down. Decoder open shift-register sending negative pulse to servos.
Servos are F & M-amplified, KEK Mini-Mites using non-centertapped battery source of 4.8v, weight 1.85 oz each. In kit systems amplifier part of the servos is built. (You assemble mechanics, add lead wires and plug.) Very compact component arrangement and narrow printed-circuit lands require trained assembly of the amplifier. Dual-linear outputs at 4 lb thrust on servos.
Airborne weight with four servos is 14.75 oz. 500mah NiCad battery pack supplied gives 5 hrs operation.
Special features are kit version's very-detailed instruction book and parts location printed on top of the PC boards to further simplify assembly. All tune-up is done with meter on transmitter. RF section prebuilt and tuned.
703 Slate N.W., Albuquerque, N. M. 87101
Galaxy 5 is 5-function system available on 27mhz and 50mbz bands for $399.50. Larger deluxe 5-channel system with inductive feedback servos and failsafe mode available for $424.50.
Transmitter uses Kraft stick assemblies on dual-stick and special-order single-stick set. 800mw output with 7.2v NiCad pack gives 11 hrs operation. Encoder circuit is free-running multi with series of 1/2-shots. Pulse at neutral is 1.7ms and controls variable plus and minus .6ms. Frame repetition rate variable 34 to 40cps.
Receiver has double-tuned front-end with one RF amplifier, mixer, and two IF stages superhet. AGC taken from detector is applied at RF amplifier and 1st and 2nd IF stages. Front-end swamping diode is also used. Sensitivity 2mv for full control. Selectivity 4kc at 6db down. Decoder an open shift-register sending positive pulse to servos.
Servos are Galatron-amplified, KEK units known as GS4 servos, using center tapped 4.8v system. Servo weight 2.5 oz, dual-linear outputs give 4 lb thrust.
Airborne system weighs 14 oz with four servos. Centertapped 4.8v pack gives 3 hrs operation.
Special features are hand-crafted sets flight-tested prior to shipment. Servo option available is Magnevac units with fail-safe circuitry and FS5 receiver useable with Galaxy 5 transmitter.
Benton Harbor. Mich. 49022
Heathkit GD-19 is 5-function system in kit form only on all modeling frequency bands for $219.95. As kit, no transmitter or receiver frequency tuning required.
Transmitter uses Kraft control sticks in either two-stick mode. Power output 400mw using 9.6v NiCad pack for 4 hrs operation. RF section completely pre-assembled and tuned. Encoder free-running multi with series of 1/2-shots. pulse at neutral is 1.5ms, control variation of .5ms. Frame link 16ms.
Receiver, specialty designed for kit building, has special features, double-tuned front-end with RF amplifier using three cascaded-ceramic IF filters. This offers a non-tuning superhet, which is sharper and more temperature stable than conventional circuits. Sensitivity less than .5mv for full control. Selectivity 3kc at 3db down, 10kc at 30db down. AGC taken from signal detector applied to 1st RF and IF stages, but not as in conventional receivers, although similar. Decoder is open ring-counter using SCS's, sends positive pulses to servos. Receiver/decoder package quite small because of cascaded-ceramic filters and SCS's, has two side-by-side boards in plastic case.
Servos are KPS-9 capacitive-feedback units with Heathkit amplifiers, using Heath connector plugs similar to Brunner plugs. Servo has dual-linear and reverse-rotary output with 3 1/4 lb thrust, and 2 1/2 oz weight. Centertapped 4.8v supply.
Airborne weight with four servos and flat 500mah NiCad pack is 16.7 oz. Gives 4 hrs operation.
Special features include use of some Kraft Systems accessories, such as small battery pack, small servos, and servo mounting bracket. Space-saving terminal block simplifies wiring.
KRAFT SYSTEMS, INC.
450 West California St., Vista, Calif. 92083
Kraft KP-4B transmitter
Kraft KP-4B and KP-6B are two-stick systems for 4 and 6 functions, on all modeling frequencies, .$399.95 and $449.95 respectively.
Transmitter has 350mw output with 9.6v NiCad battery of 500mah capacity giving 4 hrs continuous operation. Sticks Kraft gimbaled units available with throttle left or right, trims on each primary function. Pulse width at neutral is 1.45ms with plus or minus .5ms variation. Encoder free-running multi with series of 1/2-shots as clock. Frame link 16ms for four-channel set, 18ms for 6 channel.
Receiver is superhet with double-tuned front-end, mixer, two IF stages. AGC from detector applied at 1st and 2nd IF stages. Sensitivity 2 1/2mv for control. Selectivity 3kc at 6db down, 10kc at 20db down. Decoder is open ring-counter, positive pulses going to servos. Housed in plastic case with receiver and decoder on separate boards side-by-side.
Servos either tiny KPS-1O, weight 1.8 oz, single-rotary output with 3 1/2 lb thrust, or capacitive-feedback KPS-9 servo with dual-linear and reverse-rotary output with 3 1/4 lb thrust. Servos interchangeable, can be mixed.
Airborne battery packs choice of 225mah cells or 500mah cells at 4.8v. Weight installed with KPS-1O servos and 225mah batteries 12 oz. With KPS-9 servos and 500mah batteries 16.75 oz.
Special features are convenient mount bracket for three KPS-10 servos and on/off switch, choice of servos or battery pack options, narrow Gold Medal Series transmitter case, separate battery chargers available, convertability of 4-function set to 6 controls, and 150-180 degree servo for flaps operation.
Kraft Single-Stick six channel
Kraft KP-4S and KP-6S are single-stick versions of the KP-4B and KP-6B systems. Available on all modeling frequencies for $419.95 and $469.95 respectively for 4 and 6 functions.
Transmitter uses two-axis Kraft gimbaled stick assembly with rudder function operated by twisting knob on top of the stick. All three controls of stick are trimmable with separate levers, throttle control on side of transmitter also trimmable. Power output 350mw, 9.6v NiCad pack of 500mah capacity gives 4 hrs continuous operation. Encoder is free-running multi with series of 1/2-shots as a clock with frame link of 16ms for four functions and 18ms for six functions. Pulse width at neutral is 1.45ms with variation of plus and minus .5ms.
Receiver is superhet with double-tuned front-end, mixer, two IF stages. AGC picked up from detector applied to 1st and 2nd IF stages. Sensitivity 2 1/2mv for control; selectivity 3kc at 6db down, 10kc at 20db down. Decoder is open ring-counter. Pulses to servos positive. Four function. receiver slightly smaller in length than 6-channel set, both are side-by-side receiver and decoder units housed in plastic case.
Kraft Gold Medal Series
Servos are choice of KPS-9, a capacitive feedback servo with dual-lineal and reverse-rotary outputs at 3 1/4 lb thrust, and KPS-10 tiny resistive feedback servo with rotary output at 3 1/2 lbs thrust. Weights 2.5 oz and 1.8 oz respectively. Centertapped 4.8v powers units.
Airborne weight with optional 225mah battery pack and KPS-10 servos 12 oz, with standard 500mah battery and KPS-9 servos weight 16.75 oz. Battery packs are 4.8v, operation time up to 3 hrs on larger cells, 1 1/2 hrs on smaller.
Special features are expandability of 4-function system to 6 functions. Trims on all primary controls. 150-180 degree servo for flaps operation. Optional 225mah or 500mah battery pack and either KPS-10 or KPS-9 servos. Mounting bracket for servos also available.
530 South Mountain Ave., Ontario, Calif. 91762
Micro-Avionics XL-4D is 4-function system for dual-stick operation on all modeling frequencies for $399.95.
Transmitter uses enclosed gimbaled Micro-Avionics stick assemblies, throttle available left or right. Power output 500mw using 10v NiCad pack for 4 hrs operation. Encoder is free-running multi with series of 1/2-shots as ring-counter using integrated circuits. Pulse at neutral 2ms with plus and minus .5ms for control. Frame link 30ms.
Receiver is double-tuned front-end, mixer, and two IF stages superhet. AGC from second signal detector applied at 1st and 2nd IF stages. Sensitivity 2mv on 27mhz and 1mv on 72mhz for full control. Selectivity 10kc at 45db down, 3kc at 6db down. Decoder will use integrated circuits in logic portion as open ring-counter. Pulses to servos are positive.
Servos under development as survey prepared, will be smaller than in 1968 and use integrated circuits. 4.8v centertapped source will be used. Weight will be under 1.75 oz.
Airborne weight will be under 14 oz. Battery pack will be 500mah 4.8v NiCad or optional 250mah pack. On standard 500mah pack 3 hrs operation available.
Special features are servo mounting clips to facilitate mounting and changing gear from plane to plane. Integrated circuits used throughout. Wiring harness has an in-the-receiver connector strip, connectors locked in with the case. Special Micro-Avionics connectors used. Servos are made entirely of General Electric Lexan plastic. Parts are to be interchangeable with last year's system.
Micro-Avionics XL-6D and XL-6S are 6-function dual and single-stick control systems on all modeling frequencies for $429.95 each.
Transmitter has 500mw output operating for 4 hrs on 10v NiCad pack. Control sticks made by M-A, have trims on all prime functions. Single stick has rudder control on top rear-right corner or can be on control column. Encoder free-running multi with series of 1/2-shots made up of integrated circuits. Pulse at neutral is 2ms with frame link of 30ms.
Receiver is double-tuned front-end, mixer, and two IF stages superhet with its AGC taken from second detector and applied to 1st and 2nd IF stages. Sensitivity 2mv on 27mh., 1mv on 72mhz. Selectivity is 3kv at 6db down and 10kc at 45db down. Decoder uses integrated circuitry for logic portion and is open-ring-counter type circuit. Servo signal is positive-going pulse.
Servos under development as survey prepared, will be smaller than in 1968 and use integrated circuits. 4.8v center tapped source will be used. Weight will be under 1.75 oz.
Airborne weight will be under 14 oz with four servos and standard 500mah battery pack. Light 250mah pack may also be available. Larger cells give 3 hrs operation.
Special features are servo-mounting clips to facilitate mounting and changing gear from plane to plane. Integrated circuits throughout for reliability and light weight. Wiring harness has an in-the-receiver-case connector strip, connectors locked in by case. Servos have special M-A connectors which can not be plugged together backwards. Servos made of General Electric Lexan plastic, may be used with last year's systems.
MIN-X RADIO, INC.
8714 Grand River Ave., Detroit, Mich. 48204
Min-X IC4 is 4-channel digital set available on 27mhz and 50mhz for $350.
Transmitter uses O.S. enclosed control-stick assemblies changeable for throttle left or right. Power output unusually strong at 1 1/4w into centerloaded antenna. 10v NiCad pack gives 1 1/2 hrs operation. Encoder is unijunction transistor triggered series of one shots using integrated circuits. Pulse width at neutral is 1 1/2ms variable .5ms plus and minus for control. Frame link 15ms.
Receiver is superhet using double-tuned front-end mixer and three IF stages. AGC voltage from detector controls first IF stage. Front-end swamping diode also used for close range AGC function. Sensitivity 3 1/2mv for full control. Selectivity 4kc at 5db down. Encoder uses integrated circuits for logic functions, is open ring-counter sending positive pulses to the servos.
Servos are either Kraft KPS-9 capacitive feedback units with Min-X amplifiers, or KEK mini servos with molded-pot feedback and Min-X amplifiers. Both servos 3 1/2 lb thrust. Weights 2 1/2 oz and 2 oz respectively.
Airborne system uses 600mah 4.8v center tapped pack offering 2 hrs operation. Weight of complete system is 15 1/2 oz with KPS-9 servos and 14 oz with KEK servos.
Special features are integrated circuitry in both transmitter and receiver, short extended length high-output Min-X centerloaded antenna.
Min-X RCS-III is 3-function system made especially for R/C gas-engined racing cars. Controls steering, throttle, gear shift. Available on 27mhz and 50mhz for $275.
Transmitter is arranged for most convenient operation of steering and gear shift on uni-centering Min-X stick on face of transmitter with throttle on right side. Movement of stick forward is high gear, center is neutral, back is low gear. Servo response is setup for RA/Car gear box and shift linkage. Power output 1 1/2w using 10v NiCad pack or 600mah giving 1 1/2 hrs operation. Encoder binary counter with re-set, uses two unijunction transistors. Pulse at neutral is 1 1/2ms variable plus and minus .5ms.
Receiver is two-deck with superhet on top. Two front-end tuning stages, mixer and two IF stages. AGC taken from detector controls 1st IF stage. Sensitivity 3 1/2mv for control. Selectivity 8kc at 5db down. Receiver is powered from 7.2v pack regulated at 3v. Decoder is open ring-counter with integrated circuits. Servos receive positive pulses.
Servos are KEK mini servos with special Min-X high-power amplifier using centertapped 7.2v supply, giving 5 lb thrust and very fast action. Weight 2 oz each.
Airborne - rather, car-carried system - weighs 16 oz. 7.2v 600mah NiCad pack gives 2 hrs operation.
Special features design for race-car operation with powerful fast servos and strong transmitter signal to eliminate noise interference. Brakes can be operated directly from extreme low-throttle position taking advantage of servo thrust. System could be flown in planes but elevator function would be restricted.
ORBIT ELECTRONICS, INC.
11601 Anabel Ave., Garden Grove, Calif.
Orbit 6-16 IC (1968)
Orbit 4-8 IC and 6-12 IC systems are 4- and 6-function sets on all modeling frequencies at $415 and $465 respectively .
Transmitter uses Orbit gimbaled stick assemblies in either two-stick mode. Single-stick system with three-axis control column also available. Trims used on all primary controls. Power output 350mw using 10.1v regulated NiCad pack offering 4 hrs operation. Encoder free-running multi with series of 1/2-shots. Pulse at neutral is 1.7ms with variation of plus and minus .5ms. Frame link 22ms.
Receiver is single-deck construction superhet and decoder. Two front-end tuning stages, mixer and two IF stages are in superhet receiver. Dual-level AGC gets signal from detector and applies it at 1st and 2nd IF stages. Sensitivity 3mv for full control. Selectivity 6kc at 3db down. Decoder is open shift-register made with two dual-gate flip-flop integrated circuits for 4 channels and with three for 6 channels. Signal to servos positive-going pulses.
Orbit Single-Stick transmitter
Servos are PS3 or PS4 units. The first has dual-linear and rotary outputs at over 4 lb thrust weight 2 oz each. Second is new tiny servo, weight 1.4 oz, having single rotary output. This servo uses new slim-size motor. 4.8v centertapped batteries.
Airborne weight with four servos and 500mah battery pack 10 1/2 oz, using PS4 servos, 14 1/2 oz with PS3 servos. 4.8v battery pack gives 2 hrs operation.
Special features are availability of 180-degree servo for flaps, servo mounting brackets for each type of servo, high reliability because of integrated circuits. New PS3 servos can be used in all previous Orbit digital systems. but PS4 servos only work with Orbit IC sets. 4-function set convertible to 6 functions at factory for $60 less servos.
PROPORTIONAL CONTROL SYSTEMS
450 West California st., Vista, Calif. 92083
PCS-4 is 4-function control system available on all modeling frequencies with four servos at $299.95. For beginners is sold with one servo for $219.95.
Transmitter has 350mw output on 9.6v NiCad battery pack giving 4 hrs operation. Controls arrangement is two-stick Kraft units with throttle right or left. Encoder free-running multi with series of 1/2-shots. Pulse at neutral is 1.45ms with variation of plus and minus .5ms. Frame link 16ms.
Receiver is superhet using two front-end tuning stages, mixer and two IF stages. AGC taken from detector is applied to 1st and 2nd IF. Sensitivity 2 1/2mv for control. Selectivity 3kc at 6db down, 10kc at 20db down. Encoder is open ring-counter. Signal to servos is positive-going pulse.
Servos are Kraft KPS-9 capacitive-feedback units with dual-linear and reverse-rotary output, 3 1/4: lb thrust. Weight 2.5 oz each. Centertapped 4.8v battery supply.
Airborne weight with four servos, standard battery pack complete is 16.25 oz. 4.8v NiCad battery pack of 500mah, giving about 3 hrs operation.
Special features are availability of all Kraft system extra and optional items such as KPS-10 miniature servos, 225mah light-weight battery pack, servo mounting brackets.
ROYAL ELECTRONICS CORP.
2101 So. Layden, Denver, Colo. 80222
Royal Classic 6-channel deluxe
Royal Classic digital systems are available for 2 through 6 functions, built-up or in kit form. Prices vary from $189.95 for 2-channel kit to $429.95 for the 6-channel system built-up. 27mhz only. other frequencies available later.
Transmitter uses either Bonner, Micro-Avionics or Kraft control sticks in either two-stick arrangement. Power output is 800mw with centerloaded antenna. 8.4v 600mah NiCad pack gives 4 hrs operation. Encoder circuit is unijunction transistor with series of 1/2-shots, employing two integrated circuits for sharp pulse forming. Pulse output is 1.5ms for neutral, plus and minus .5ms. Frame link 20ms.
Receiver is a superhet with double-tuned front-end, mixer, and two IF stages. Three stage AGC is used controlling mixer, both IF stages. Sensitivity 2mv for full control. Selectivity is equivalent to image rejection approximately-equal to 20db at 1 microvolt. Decoder is closed ring-counter using SCS's, giving positive pulse to servos.
Servos are either Orbit PS2 or PS3, also 4RS Bonner with Classic amplifier. Kraft KPS-9 and KPS-10 available later. All servos 4 lb thrust or more. Bonner unit has single-linear output, KPS-10 single-rotary output, KPS-9 dual-linear and reverse-rotary output. Orbit PS2 rotary and linear output, and PS3 dual-linear and rotary output. PS2 servo is recommended for heavy-duty operations. All servos use centertapped 4.8v battery source. Weights; PS2 2 1/2 oz, PS3 2 OZ, KPS-9 2 1/4 oz.
Airborne weight averages under 15 oz with 600mah battery pack. Weight with optional 225mah pack is under 12.9 oz. Flying time 5 hrs and 2 hrs respectively.
Special features are servo mounting brackets, 180-degree servo, expandability of each system up to 6 channels.
SIMPROP-NELSON MODEL PRODUCTS, INC.
PO Box 2027, Dublin, Calif. 94566
Simprop Digi 5
Simprop Digi 5 is 5-function system imported from West Germany by Nelson Model Products who provide complete service facilities. Available on 27mhz and 72mh. at $379.50.
Transmitter, of unique case design with upward-projecting antenna, uses Simprop gimbaled control sticks which may be changed for either two-stick arrangement. Transmitting frequency is changeable at flying field by installing another crystal. Output 350mw using 14:4v NiCad pack, giving 2 1/2 hrs operation. Encoder free-running multi with series of 1/2-shots. Pulse at neutral is 2ms with variation of plus and minus .5ms, frame link 22ms.
Receiver is double-tuned front-end superhet with mixer, two IF stages. AGC is obtained by taking voltage at detector and feeding it into the 1st and 2nd IF stages. Sensitivity 2mv for full control. Selectivity 3kc at 6db, 10kc at 20db down. Decoder using SCS units is open ring-counter sending positive pulses to servos.
Servos either large or small Simprop units which have 5 lb thrust, weight 2 oz and 2 1/2 oz respectively. Centertapped 4.8V. Both have rotary output.
Airborne weight with large servos 17 1/2 oz, 15 1/2 oz with small servos. 500mah 4.8v battery pack gives 5 hrs operation.
Special features are changeable frequency by using a set of specially-ground crystals available from Nelson Model Products, plug-in receptacle provided in both receiver and transmitter. Configuration of transmitter case permits improved neck-strap flying position, better balance for hand-held flying. Teacher-student training system offered, tiny servos interchangeable with larger units, very high servo power. Crystal sets cost $12.
SIMUL LOGIC SYSTEMS CORP.
184 Green Ave., Woodbury, N. J. 08096
Simul Logic Seven is 7-function control system on all frequencies, with four servos for $349.95.
Transmitter uses Micro-Avionics stick assemblies with trim on all basic functions and with three auxiliary functions. Power output 800mw on 9.6v NiCad pack giving 4 hrs operation. Encoder uses integrated circuits with only a few additional discrete components. Pulse at neutral is 1.5ms with variation of .5ms, frame link 19ms. Encoder circuit is unijunction transistor triggered with series of 1/2-shots. Integrated circuits used for 1/2-shots and pulse forming.
Receiver is unusual in that it has three front-end tuning stages, one RF amplifier which is an FET, and four IF stages. AGC is quadruple-level system including a front-end swamping diode, voltage from detector is applied to front end, mixer, and all IF stages. Sensitivity is better than 1/2mv because of characteristics of FET used. Selectivity is 10kc at 40db. Decoder is closed-type ring-counter using all discrete components. Signal to servos is positive-going pulse.
Servos are SLS amplified P53 units from Orbit. Weight 2 oz each. Outputs are dual-linear and rotary with 4 1/2 lb thrust on centertapped 4.8v pack.
Airborne system with four servos weighs 14 oz. Battery pack is 600mah 4.8v giving 6 hrs operation.
Special features are extremely sharp tuning receiver allowing high-sensitivity with potent AGC high-power transmitter can be used. Electronic brakes and 180-degree servo available. Servo-mounting brackets from Orbit can also be used. Normal 7 functions can be factory expanded to 8 channels.
WORLD ENGINES INC.
8960 Rossash Ave., Cincinnati, Ohio 45236
Controlaire Proportional system offers up to 6 functions but available standard with 4 functions. On 27mhz and 72mhz deluxe system $300; basic standard system $250. Primary difference is batteries and chargers.
Transmitter uses new long-handled O.S. control stiCks with throttle changeable for left or right. Power output 250mw into center-loaded antenna. 9v dry, or 9.6v NiCad, battery pack. Battery charger in transmitter has transformer-isolated circuitry. Encoder free-running multi with series of 1/2-shots for each function. Pulse widths, 1.1ms, 1.7ms, and 2.3ms with frame rate of 60cps. Dry battery gives 20 hrs continuous, NiCad gives 10 hrs continuous.
Receiver is conventional superhet with double-tuned front-end, mixer, and two IF stages. AGC picked up at detector, applied at first IF. Sensitivity, 4mv for full control. Selectivity 4kc at 10db down. Decoder is open ring-counter with discrete components. Output negative pulses to servos.
Servos are choice of either Controlaire S-3 or S-4 units or combination of units. The first is 2.3 oz with dual-linear and rotary output; second is smaller 1.75 oz single-rotary output unit. Both about 3 lbs thrust.
Airborne weight will vary with 4.8v battery pack used: 250mah, 500mah, 600mah and 600mah flat-shape pack. Flying weight with 500mah pack and S-4 servos 14 1/2 oz; with S-3 servos, 16 oz. 250mah pack gives 1 1/2 hrs operation. Choice of batteries at no extra cost.
Special features are availability of different battery packs, servo models, and the deluxe system with all-rechargeable batteries. Electronic brakes and servo mount brackets are extras. Transmitter has charging socket on face of unit, not on bottom subject to dirt and some inconvenience. Servo mounting clips supplied with servos; locate clip in plane, snap servo in place. With additional clips servos easily moved plane to plane. Interchangeable with M.A.N. 2-3-4 kit system throughout.
M.A.N. 2-3-4 is kit system similar to Controlaire Proportional. Available only on 27mhz as full-kit, semi-kit, or built-up and for 2 through 4 channels for $126.50 to $300 all-built.
Controlaire M.A.N. 2-3-4
Transmitter uses O.S. control sticks with throttle operation left or right. 250mw power output with center-loaded antenna. Basic units have 9v dry battery and NiCad optional with transformer-isolated charger circuit in transmitter case. Encoder circuit free-running multi and series of 1/2-shots. Pulses are 1.1ms, 1.7ms, and 2.3ms for each function at frame rate of 60cps. Dry battery gives 20 hrs continuous operation.
Receiver is double-tuned front-end superhet with mixer, and two IF stages. AGC is detected at signal detector and fed back to first IF stage. Sensitivity 4mv for control. Selectivity of 4kc at 10db down. An open ring-counter-type decoder used with discrete components. Signal to servos is negative-going pulse.
Servos either tiny S-4 or rugged versatile S-3 Controlaire units. Amplifiers use single integrated circuit and discrete driver transistors. S-4 has single-rotary output, weighs 1.75 oz; S-3 has dual-linear and rotary output, weighs 2.3 oz. Both have at least 3 lb thrust.
Airborne weight with four servos depends on battery pack. With 250mah pack weight is 12 1/2 oz (which gives 1 1/2 hr operation), with 500mah batteries 14 1/2 oz. Weights are with S-4 servo. Choice of batteries at no extra cost.
Special features include the options of servos, battery packs, type of partly built or all-kit, expandability up to 6 channels, inexpensive to start with as 2-channel set. Electronic brakes and servo mount brackets available, although servos come with mounting clip. Transmitter has charger receptacle on face, not on bottom subject to dirt and inconvenience.
O.S. 4-Channel proportional outfit is deluxe Japanese system imported, sold and serviced by World Engines. Available on 27mhz only for $350.
Transmitter has 630mw output into center-loaded antenna using 12v NiCad battery for 5 hrs operation. Decoder is free-running multi with series of one shots. Pulse at neutral is 1.6ms with plus or minus .6ms variation. All controls trimmable with O.S. stick assemblies. Single-stick unit available but special order. Frame rate 60cps.
Receiver is two-deck unit with superhet on top. Uses 2 front-end tuning stages, mixer, and two IF stages. AGC from signal detector goes back into first IF stage. 2mv required for full control sensitivity. Selectivity 4kc at 10db down. Decoder open ring-counter, signal to servo negative pulses.
Servos are new plastic O.S. miniature units, weight 2.7 oz. Have rotary output and 4 1/2 lb thrust. Older O.S. systems mayor may not be updated with these new servos depending on battery pack of older unit.
Airborne battery pack is 4.8v NiCad unit of 600mah cells giving 2 1/2 hrs operation. Wiring harness uses Orbit-style 4-pin plugs made by O.S. Weight of system is 18 oz.
Special features are deluxe system, leather case for transmitter on special order, high-thrust servos at 4 1/2 lbs. Circuitry throughout is similar to Controlaire systems and easily serviced by them, although circuitry may vary in different O.S. proportional systems.
Posted May 14, 2011