Airplanes and Rockets' history & copyright Google search American Modeler Air Trails American Aircraft Modeler Young Men Hobbies Aviation Flying Aces Saturday Evening Post Boys' Life Hobby Distributors Amateur Astronomy Celestron CPC 800 Deluxe Engines & Motors Balsa Densities Silkspan Covering Comics Hints & kinks Snoopy Telephone Peanuts Collection Charles Schulz Saturday Evening Post Electronics My Models Model Aircraft Articles Plans Model Boat Articles Plans Model Car Articles Plans Model Train Articles Plans Grandmother Clock 1941 Crosley 03CB Radio Model helicopter articles & plans Crosswords Model Rocket Articles Plans Restoration Projects Photos Peanuts Collection Model Aircraft Articles Plans Sitemap Homepage Hints Amateur Radio Personal Everything from the homepage Miscellaneous Activities Airplanes and Rockets Hero Graphic

Citizen-Ship Model SPX Single-Channel Radio Control System

My very first radio control system was a single-channel Citizen-Ship Model SPX like this one I bought on eBay. I stupidly sold my original, which was in mint condition and still in the box many years ago, this example is in used condition, but still looks pretty good. A little isopropyl alcohol and 409 cleaner did a nice job of cleaning the 'used-ness' off of it. This was one of the first transistorized production radio systems which, along with other such systems, prompted a lot of people to get into radio control since cost, size, weight, and complexity were greatly reduced. Much greater immunity to vibration and electrical noise effects made reliability much better as well.

Citizen-Ship Model SPX Transmitter & Receiver  - Airplanes and Rockets

Four transistors are used in the transmitter: a Texas Instruments (TI) 2N696 and a TI 2N1305, and two 2N2188s. The 2N696 is a silicon NPN type, the 2V1305 is a germanium PNP type, and the 2N2188 is a germanium PNP type. The receiver uses a Philco 2N260 silicon PNP transistor and a Philco 2N261 silicon PNP transistor.

Transmitter inside left (Citizen-Ship SPX R/C System) - Airplanes and Rockets

Transmitter inside left (Citizen-Ship SPX R/C System)

Transmitter inside center (Citizen-Ship SPX R/C System) - Airplanes and Rockets 

Transmitter inside center (Citizen-Ship SPX R/C System)

Transmitter circuit board bottom (Citizen-Ship SPX R/C System) - Airplanes and Rockets

Transmitter circuit board bottom (Citizen-Ship SPX R/C System)

Transmitter inside right (Citizen-Ship SPX R/C System) - Airplanes and Rockets

Transmitter inside right (Citizen-Ship SPX R/C System)

Transmitter circuit board top (Citizen-Ship SPX R/C System) - Airplanes and Rockets

Transmitter circuit board top (Citizen-Ship SPX R/C System)

TI 2N696 transistor on transmitter board (Citizen-Ship SPX R/C System) - Airplanes and Rockets

TI 2N696 transistor on transmitter board (Citizen-Ship SPX R/C System)

TI 2N1305 transistor on transmitter board (Citizen-Ship SPX R/C System) - Airplanes and Rockets

TI 2N1305 transistor on transmitter board (Citizen-Ship SPX R/C System)

 

2N696    2N1305

Receiver PCB transformer side (Citizen-Ship SPX R/C System) - Airplanes and Rockets

Receiver PCB transformer side (Citizen-Ship SPX R/C System)

Receiver PCB ctransistor side (Citizen-Ship SPX R/C System) - Airplanes and Rockets

Receiver PCB transistor side (Citizen-Ship SPX R/C System)

Receiver PCB bottom side (Citizen-Ship SPX R/C System) - Airplanes and Rockets

Receiver PCB bottom side (Citizen-Ship SPX R/C System)

Receiver PCB top side (Citizen-Ship SPX R/C System) - Airplanes and Rockets

Receiver PCB top side (Citizen-Ship SPX R/C System)

Receiver PCB crystal side (Citizen-Ship SPX R/C System) - Airplanes and Rockets

Receiver PCB crystal side (Citizen-Ship SPX R/C System)

Receiver PCB antenna side (Citizen-Ship SPX R/C System) - Airplanes and Rockets

Receiver PCB antenna side (Citizen-Ship SPX R/C System)

 

 

Posted May 6, 2015

About Airplanes & Rockets

Kirt Blattenberger, Webmaster - Airplanes and Rockets
Kirt Blattenberger
Carpe Diem!
(Seize the Day!)

Even during the busiest times of my life I have endeavored to maintain some form of model building activity. This site has been created to help me chronicle my journey through a lifelong involvement in model aviation, which all began in Mayo, MD. There is a lot of good information and there are lot of pictures throughout the website that you will probably find useful, and might even bring back some old memories from your own days of yore. The website began life around 1996 as an EarthLink screen name of ModelAirplanes, and quickly grew to where more server space ...

Try Using SEARCH to Find
What You Need.
>1,400 Pages Indexed
on Airplanes & Rockets!

Copyright 1996 - 2022
Webmaster:
Kirt Blattenberger
BSEE - KB3UON
Family Websites:
RF Cafe | Equine Kingdom

All trademarks, copyrights, patents, and other rights of ownership to images and
text used on the Airplanes and Rockets website are hereby acknowledged.

height line

Modeling Resources

Academy of Model Aeronautics (AMA) - Airplanes and Rockets
Academy of Model Aeronautics

Tower Hobbies logo - Airplanes and Rockets
Tower Hobbies

Horizon Hobby logo - Airplanes and Rockets
Horizon Hobby

Sig Manufacturing - Airplanes and Rockets
Sig Mfg

Brodak Manufacturing - Airplanes and Rockets
Brodak Mfg