Ethogram (AC)

Burndept Ltd. London

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  • Year
  • 1930 ?
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 228638

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Number of Tubes
  • 7
  • Tuned circuits
  • 2 AM circuit(s)
  • Wave bands
  • Broadcast (MW) and Long Wave.
  • Details
  • Record Player (not changer)
  • Power type and voltage
  • Alternating Current supply (AC) / 100-110 / 200-240 Volt
  • Loudspeaker
  • -Loudspeaker incorporated, but system not known.
  • Power out
  • 15 W (20 W max.)
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Ethogram - Burndept Ltd. London
  • Shape
  • Console, Lowboy (legs < 50 %).
  • Notes

  • Two 625A valves in push-pull. Small Westinghouse metal rectifier for grid bias.

    Marconi calls the P625A a "Super Power output" valve. Class B Push Pull could be close to 20W (6W single ended class A)

    The non AC Ethogram is S22 HL2 H210 P2/b (2V types instead of AC version 4V indirect  MS4 MS4 MH4 MH4)  P2/b listed by Marconi is a selected P2, or PT240 is also alternative, normally an Audio out, but used to drive phase splitter transformer.

    The MS4 MS4 MH4 MH4 P625A P625A and U10 are suggested in "Marconi valves" which must be 1930 or most likely 1931 as the "DPT" (1931) is listed as new. The 506 is possibly Philips (not BVA). The P625A is MO/Mazda, so it's possible that U10 is "correct" type and Radiogram is 1930 (the reference is Wireless World 1930).

    Mullard lists pre 1939 Burndept, but not this model.

  • Author
  • Model page created by John Koster. See "Data change" for further contributors.

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