Roadmaster Radio-Amplifier RA7-310

Farmers Radio Service Co. (Roadmaster); Adelaide, SA

  • Year
  • 1948
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 309232

 Technical Specifications

  • Main principle
  • Audio-Amplification
  • Tuned circuits
  • 1 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Direct Current supply (DC) / 6 Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • Power out
  • 5 W (undistorted)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Roadmaster Radio-Amplifier RA7-310 - Farmers Radio Service Co.
  • Dimensions (WHD)
  • 320 x 200 x 220 mm / 12.6 x 7.9 x 8.7 inch
  • Notes
  • Bus radio-amplifier with Zepher 65 series crystal microphone (normally on goose neck).

    Used by bus drivers to as a radio and a PA to address passengers.

    Farmers Radio also manufactured a strap on plate for the Zephyr 65 Microphone that would go around the neck and sit on the wearer's chest.

  • Net weight (2.2 lb = 1 kg)
  • 8.8 kg / 19 lb 6.1 oz (19.383 lb)
  • Author
  • Model page created by Keith Ellison. See "Data change" for further contributors.

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