Wireless Set No.9

MILITARY U.K. (different makers for same model)

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  • Year
  • 1939–1941
  • Category
  • Military Transceiver (TRX)
  • Radiomuseum.org ID
  • 203293

 Technical Specifications

  • Number of Tubes
  • 11
  • Main principle
  • Transceiver; ZF/IF 420 kHz
  • Wave bands
  • Short Wave (SW only)
  • Power type and voltage
  • Storage Battery for all (e.g. for car radios and amateur radios) / 12 Volt
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Wireless Set No.9 - MILITARY U.K. different makers
  • Shape
  • Boatanchor (heavy military or commercial set >20 kg).
  • Dimensions (WHD)
  • 41 x 16 x 12 inch / 1041 x 406 x 305 mm
  • Notes
  • Wireless set No. 9: Medium range transceiver covering 1,875 - 5 MHz, AM (A3), MCW (A2) and CW (A1), pout 5 Watt telephony, 10 Watt CW;
    powered by 12 V 125 Ah accumulator for heaters and rotary transformer for 1100 V HT and anode converter for 200 V for transmitter ans receiver; six foot rod antenna;
    used by British Army for medium range communications between armoured fighting vehicles and on trucks for Division signals.
    The Wireless Set No. 9 consists of a receiver unit, a supply unit in the middle and a transmitter unit at the right. The set is equipped with to identical master oscillator and antenna tuning circuits for a red and blue channel which can be changed by a two position frequency change switch (also referred as "flick mechanism"). Only early models also feature crystal controlled operation.
    The set replaced the less successful W.S. 2 and 7, has been produced in a first batch of 50 and another 200 sets in 1937 by Standard Telephones and Cables, until 1941, a total of about 400 sets have been made.
    The set has seen very much use as AFC set in the Western Desert campaign in 1940/1941; it has been replaced by Wireless Set 12 as ground station and vehicle station and by the popular Wireless Set 19 as AFV / tank set.
  • Mentioned in
  • Wireless for the Warrior Vol. 1, L. Meulstee
  • Author
  • Model page created by Martin Bösch. See "Data change" for further contributors.

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