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Rocket Kits + Accessories - Airplanes and Rockets

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 ...

Copyright

1996 - 2026

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.

Drones - Airplanes and Rockets

Simple Reed Servo Driver, by Bobby Hill

June 1968 American Aircraft Modeler

June 1968 American Aircraft Modeler

June 1968 American Aircraft Modeler magazine cover Table of Contents

These pages from vintage modeling magazines like Flying Aces, Air Trails, American Modeler, American Aircraft Modeler, Young Men, Flying Models, Model Airplane News, R/C Modeler, captured the era. All copyrights acknowledged.

At the request of a website visitor Bobby Hill, I hunted down and scanned this Simple Reed Servo Drive circuit of his that was published on page 31 of the June 1968 American Aircraft Modeler magazine. It was part of a monthly column by Howard Mc Entee called Radio Control World.

Simple Reed Servo Driver

Simple reed servo driver: As was the case with his trim servo amplifier for converting reed servos, which we diagrammed in a past issue, the self-neutralizing amplifier shown here will fit inside a Crescent 15-pin plug, so doesn't even have to go inside the servo. Arrangement has been used by Bobby Hill (2125 18th St. S. E., Washington, D. C. 20020) with Duramite servos. Circuitry should be such that negative voltage is applied to the bases of the 2N1303 transistors, when a reed vibrates. The four positioning contact strips are all connected together as a safety factor, and to lower resistance.

Simple Reed Servo Driver - Airplanes and Rockets

Bobby Hill, a dedicated reed flyer, developed this remarkably simple reed servo drive amplifier that requires no bias battery. We needed this idea ten years ago! Other applications possible.

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

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