Palmavox 724 With 6N8 valve

Palmavox (Brand), F.J. Palmer & Son Ltd.; Sydney NSW

Data
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  • Year
  • 1949–1952
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 317836

 Technical Specifications

  • Number of Tubes
  • 3
  • Main principle
  • TRF (Tuned-Radio-Frequency but use of regeneration unknown)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Alternating Current supply (AC) / 240v AC Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 4 inch = 10.2 cm
  • Material
  • Plastics (no bakelite or catalin)
  • from Radiomuseum.org
  • Model: Palmavox 724 [With 6N8 valve] - Palmavox Brand, F.J. Palmer &
  • Shape
  • Tablemodel without push buttons, Mantel/Midget/Compact up to 14
  • Dimensions (WHD)
  • 200 x 120 x 110 mm / 7.9 x 4.7 x 4.3 inch
  • Notes

  • Titan made this Palmavox radio for Palmers department store (F.J. Palmers & Sons, Sydney).

    The TRF circuit uses the 6N8 as the RF Amplifier & Detector, the 6M5 as a high gain Audio Amplifier driving a 4 inch Speaker and a 6X4 Rectifier valve. The high tension voltage is obtained by direct rectification of the 240 volt mains (no transformer). The low tension voltage for the valve filaments & dial light is taken from a small transformer.

    Although this radio uses a power transformer it only supplies the valve heaters and dial lights. The Active line connects directly to the 6X4 Rectifier valve, then goes to Ground (Chassis) via the filament Transformer winding.

    The chassis is connected to one side of the mains and may be "live". We do NOT always state such cases - since often the uploader does not know.

    A 2 pole Push Button "Safety Switch", is connected to the back of the chassis, and the radio can only be operated when the back Fibre Board cover is bolted on, thus opening this Safety Switch. 

    The ON/OFF switch of the radio, is then operated from the Volume Potentiometer (On/Off/Volume), and the chassis is completely insulated from the Cabinet & Volume & Tuning knobs via the insulated screws on the back Fibre Board cover.

  • Net weight (2.2 lb = 1 kg)
  • 2.2 kg / 4 lb 13.5 oz (4.846 lb)
  • Mentioned in
  • Radio Days/ Australian Bakelite Radios By Peter Sheridan, Page 203
  • Author
  • Model page created by Bruce Wilkie. See "Data change" for further contributors.

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The model Palmavox is part of the collections of the following members.

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