Dedicated to the Preservation and Presentation of Canadian Radio History


 
   
 

 

Radio Interest
 

Our Radio Interest page will be featuring the many fancinating themes
 of Vintage Amateur Radio Stations of the 1920's Era

 

Find more at VE3CFE's Vintage Amateur Radio Station Site at VintageHamStation.com


Here are some Pics of VE3CFE Homebrew Vinatge Radio Projects

 

 

 

Four Tube Regenerative Receiver
Set features:
- 222 screen grid un-tuned input amplifier
- 201 regenerative detector with resistive control
- 2 stage transformer coupled audio amplification
- Volume & Band-spread controls
- voltages 135 (RF amp) / 67 (Audio amp) / 45 (det)

Construction
- completely 1920 vintage / all brass hardware
- Silver Marshall RF chokes / Coil / Audio Transformer
- 12 gauge square bus wiring
- all on a finished Mahogany board

 

 

The station transmitter is based on the Master Ocsillator Power Amplifier design (MOPA).

- 210 Oscillator / two parallel 210s amplifier
- Hartley Oscillator into a neutralized amplifier
- Operating at 500 volts on Amp & 350 Volts for Osc.
- Plate coils slide along glass rods
- Meters for amplifier plate current & antenna power
- Home made RFC 1 diameter Cotton covered wire

 

 

 

High voltage plate power supply for the MOPA transmitter uses a pair of 281's.

RCA Radiotron UP-1368 550 volt ct Transformer

Capacitor fed - Choke - cap configuration

Required to drive approx 125 m.a.