Universal Transmitter Drive Unit MA-228

Racal Engineering / Instruments / Electronics Ltd., Bracknell

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  • Year
  • 1970 ??
  • Category
  • Commercial Transmitter (TX not Transceiver)
  • Radiomuseum.org ID
  • 109058

 Technical Specifications

  • Wave bands
  • Short Wave (SW only)
  • Power type and voltage
  • Alternating Current supply (AC) / 100-125; 200-250 Volt
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Universal Transmitter Drive Unit MA-228 - Racal Engineering /
  • Shape
  • Rack
  • Dimensions (WHD)
  • 610 x 1670 x 685 mm / 24 x 65.7 x 27 inch
  • Notes
  • Transmitter drive unit, AM (A3), SSB (A3a, A3b, A3j, A3h), CW (A1), with optional MA-242B FSK (F1, F4), RF output 250 mW;
    used to drive HF transmitter like TA-184 or TA-349 transmitters;
    fully remote controllable;
    rack consists of following components:
    MA-181 RF mixer / driver amplifier
    MA-240 modulator unit
    MA-259 frequency standard, used for high trasnitting frequency stability
    MA-250 decade frequency generator
    PU-225 servo supply power unit
    LA-195 transmitter control converter
    PU-238 power unit +/- 12 V DC
    optional: MA-242 FSK unit, for FSK modulation
  • Net weight (2.2 lb = 1 kg)
  • 317.5 kg / 699 lb 5.4 oz (699.339 lb)
  • Literature/Schematics (1)
  • Racal Handbook, Rinus Jansen
  • Author
  • Model page created by Martin Bösch. See "Data change" for further contributors.

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