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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.

Plastic Scale Model Kits - Airplanes and Rockets

User's Manual for the O.S. Digitron DP-3, 3-Channel Radio Control System

OS Digitron DP-3 Radio Control System - Airplanes and RocketsThe O.S. Digitron DP-3, 3-Channel Radio Control System was my first radio control system. After watching eBay for an affordable set, I finally found one in January of 2017 for a little over $100. It is in pretty good physical condition, but I have not tried to power it up to to see whether it works. The frequency is 27.095 MHz (my original was on 27.195 MHz). The photo to the right is a set that sold for a few hundred dollars; it included the leather transmitter case, which the one I just bought did not have.

My plan is to buy a modern spread spectrum 2.4 GHz radio and swap out the electronics in the O.S. Digitron DP-3 transmitter. I will have to rig the trim tabs to be spring-centered with switch contact on each side of center since analog (potentiometer) trims are no longer used. The 2.4 GHz antenna will mount in place of the original telescoping whip antenna. I'll probably build a couple .049-powered two- or three-channel airplanes to fly with the converted system, using the new type receiver and miniature servos. Photos of the project will be posted when complete.

Below are all the pages from the O.S. Digitron DP-3 user manual. If memory serves correctly, the original was printed on heavy paper and the covers were a sort of stiff fabric. The system I just bought had a poor photocopy on 20-lb. printer paper. A little work with an image editor cleaned it up pretty well.

O.S. Digitron DP-3 Radio Control System User Manual (p1) - Airplanes and RocketsO.S. Digitron DP-3 Radio Control System User Manual (p2) - Airplanes and RocketsO.S. Digitron DP-3 Radio Control System User Manual (p3) - Airplanes and Rockets

O.S. Digitron DP-3 Radio Control System User Manual (p4) - Airplanes and Rockets O.S. Digitron DP-3 Radio Control System User Manual (p5) - Airplanes and RocketsO.S. Digitron DP-3 Radio Control System User Manual (p6) - Airplanes and Rockets

O.S. Digitron DP-3 Radio Control System User Manual (p7) - Airplanes and RocketsO.S. Digitron DP-3 Radio Control System User Manual (p8) - Airplanes and Rockets O.S. Digitron DP-3 Radio Control System User Manual (p9) - Airplanes and Rockets

 

 

Posted April 28, 2017


Rocket Kits + Accessories - 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