• Power: 12-24V DC or 115/220V AC (depending on variant)

• Wavebands: tuneable from 1MHz to 20MHz across 4 switched bands
  • 1.0 - 2.3MHz
  • 2.3 - 5.6MHz
  • 5.5 - 12.5MHz
  • 12.0 - 20.0MHz

• Valve lineup: 10 total
  • EF92 (RF Amplifier)
  • DK91 (Mixer)
  • DF91 (Oscillator)
  • DF91 (x3 IF Amplifier)
  • DAF91 (Detector)
  • DAF91 (BFO)
  • DF91+DAF91 (Push-Pull output)

• Released: c.1951 to c.1970

• Original price: lots!

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Another excellent example of over-engineered military gear - why so many bolts to hold the case together? R209 was intended to be used as the receiver set of transmitter stations Wireless Set 53 or Wireless Set 76. It is built on 'miniature' principles - having its own vibrator power supply and using low-voltage valves.

Last updated 17th June 2003