Teleradio Transmitter 3BZ Type J50062

Amalgamated Wireless (Australasia) Ltd. (AWA); Sydney

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  • Year
  • 1942
  • Category
  • Military transmitter
  • Radiomuseum.org ID
  • 344087

 Technical Specifications

  • Number of Tubes
  • 5
  • Number of Transistors
  • Main principle
  • Transmitter
  • 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
  • - - No sound reproduction output.
  • Power out
  • 10 W (16.5 W max.)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Teleradio Transmitter 3BZ Type J50062 - Amalgamated Wireless
  • Shape
  • Boatanchor (heavy military or commercial set >20 kg).
  • Dimensions (WHD)
  • 16 x 10.25 x 11 inch / 406 x 260 x 279 mm
  • Notes

  • Teleradio 3BZ Transmitter 
    This Radio transmitter was used in conjunction with the 3BZ receiver by coastal spotters of the New Guinea Air Warning Wireless Company (NGAWW).

    The 3BZ transmitter (Type J50062) was a new design in 1942 with the antenna (aerial) tuner built-in and 6 crystal channels and was identified as the "Teleradio 3BZ Transmitter" on the nameplate.

    The frequency coverage of the 3BZ transmitter was 10 to 2.5 MHz (30 to 120 metres) with a power output of around 12 watts on CW and 15 watts on speech.

    A heavy-duty vibrator was included on the chassis and operation was from 12-volt dc only. Power consumption was 7.5 amps during operation and 1.5 amps on standby.

    Crystals in the range from 2.5 to 5 MHz could be fitted (when operating in the 5 to 10 MHz range part of the 807 power amplifier loading coil was shorted by the crystal switch, allowing it to be tuned to the second harmonic of the crystal frequency).

    The valve complement included a 6V6 crystal oscillator, with a 6V6 microphone amplifier driving two 6V6s in push-pull to modulate an 807 RF amplifier.

     

  • Net weight (2.2 lb = 1 kg)
  • 44 lb 0 oz (44 lb) / 19.976 kg
  • Mentioned in
  • -- Original prospect or advert (Australian War Memorial, Item P01035.006)
  • Author
  • Model page created by Garry Blake. See "Data change" for further contributors.

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