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

R/C Equipment: Citizen-Ship 8-Channel
August 1958 American Modeler

August 1958 American Modeler

August 1958 American Modeler Table of Contents

These pages from vintage modeling magazines like American Aircraft Modeler, American Modeler, Air Trails, Flying Aces, Flying Models, Model Airplane News, & Young Men captured the era. I will be glad to scan articles for you. All copyrights hereby acknowledged.

Citizen-Ship was an early commercial manufacturer of radio control systems. When you see that they were producing 8-channel units back in 1958, you might be amazed. However, in those days each channel was a single direction of control. So, an 8 channels in 1958 was equivalent to 4 channels today.

3V4 Vacuum Tube DatasheetAs the schematics show, circuits from 1958 are a lot different from those used today. There was no such thing as an integrated circuit; everything was built up out of discrete resistors, capacitors, inductors, and transformers. Vacuum tubes preceded discrete transistors, which have both been replaced by ICs. Especially in circuits like transmitters, you will still find discrete Rs, Cs, and Ls, but they will likely be surface mount types rather than having wire leads for connection to the circuit board. Click on the thumbnail to the left to view the designer's datasheet for the 3V4 pentode tube.

R/C Equipment: Citizen-Ship 8-Channel

Citizen-Ship 8-Channel Transmitter Schematic, August 1958 American Modeler - Airplanes and Rockets
Circuit diagram for Model MST·8 Transmitter.


Citizen-Ship 8-Channe Receiver Schematicl, August 1958 American Modeler - Airplanes and Rockets
Circuit and photo of MSR-8 receiver.


Citizen-Ship 8-Channel Transmitter, August 1958 American Modeler - Airplanes and Rockets
Citizen-Ship's MST-8 transmitter

While the new Citizen-Ship 8-channel simultaneous reed transmitter and receiver may at first glance appear similar to other apparatus, they have significant differences. One of the most surprising is the fact that both units sell for just under a hundred dollars each. The relatively low cost does not reflect any short cuts in quality or performance.

Model MSR-8 receiver, intended for 2714 me operation, is a compact unit featuring a single tube detector, followed by two transistor amplifiers. Output feeds into an 8-reed bank which con­trols eight sensitive relays. The makers provide headphone connections for test purposes. For best results the reeds are used as follows: Two highest tone reeds - rudder; next two - ailerons; next two - motor speed; two lowest - elevator.

Thus, either elevator position may be had reliably with either position of rudder or ailerons; also, motor speed may be changed at will while rudder is being held either right or left. Relays are all SPDT for use with motor-driven servos. Escapements can be used but are not recommended where simultaneous operation is desired. While reed adjust­ment should not normally be required, it is quite simply accomplished by means of screw contacts.

The receiver is mounted on a sturdy metal chassis, with tube, transistors, reed bank and relays on a phenolic upper plate. Over these goes a metal cover, open at each end to facilitate connec­tions to the relays, which are mounted so their terminal plates face chassis ends.

Model MTS-8 transmitter is hand­held. Main control, a sturdy "stick," moves up and down for elevator action, sideways for rubber or ailerons. Along­side the stick is a lever switch which is normally in position to give rudder operation when the stick is moved sideways; when this switch is pushed up­ward however, the ailerons are controlled by stick side movement. Two motor speed buttons are at the left side of the transmitter face. It is quite feasible to use a motor control system that requires only a single audio channel, such as an escapement or Multi-servo. Other channel might then be used for some such control as flaps, brakes, etc.

Makers of reed equipment have learned that great tone stability must be built into high class electronic organs;

(Please send me an e-mail if you would like the rest of the article scanned. I missed the last couple pages while I had the magazine out the first time.)

As always, I try to accommodate requests for reprints of old articles. I do not publish plans full-size because the Academy of Model Aeronautics still provides many of them for a small fee, and I don't want to take business from them. If you absolutely cannot buy the plans anywhere (legitimately), I will send you my higher resolution scanner file(s). The potential exists for image distortion with my scanned plans, so you are safer trying to obtain originals anyway.

 

Citizen-Ship 8-Channel Switching System Schematic, August 1958 American Modeler - Airplanes and Rockets
Citizen-Ship's switching system

 

 

 

 

Posted December 18, 2010

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