• Year
  • 1926
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 69747

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

 Technical Specifications

  • Number of Tubes
  • 4
  • Main principle
  • TRF with regeneration
  • Wave bands
  • Broadcast (MW) and Long Wave.
  • Power type and voltage
  • Storage and/or dry batteries
  • Loudspeaker
  • - This model requires external speaker(s).
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: M4 [A410] - NSF Nederlandsche
  • Shape
  • Tablemodel, low profile (big size).
  • Dimensions (WHD)
  • 540 x 340 x 325 mm / 21.3 x 13.4 x 12.8 inch
  • Notes
  • Four valve receiver with variometer tuning. The blue aluminium front is divided into three sections: the left section contains the knob for primary tuning, in the middle a small scale, a wave length switch and secondary tuning. The right section contains reaction control, a loudspeaker connection and a lever for selectivity control (stronger/weaker). The receiver was available in three models: the M3 without doors (fl 250,-), the M4A with doors (fl 265,-) and the M4 Luxe, a luxurious model with doors (fl 285,-).
    The tube set was changed into the set A435 A415 A415 and B405 later on.
  • Net weight (2.2 lb = 1 kg)
  • 11.9 kg / 26 lb 3.4 oz (26.211 lb)
  • External source of data
  • Radio Amateur Museum / Frans J.J. Driesens + ISBN 90-76014-04-3.
  • Literature/Schematics (1)
  • Radio Historisch Tijdschrift 1995, attachment Nr. 3

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