Silvertone 7-Tube Battery Radio Order= 57DM 4424

Sears, Roebuck & Co.; Chicago (IL)

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  • Year
  • 1936/1937
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 56249
    • Brand: Silvertone

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

 Technical Specifications

  • Number of Tubes
  • 6
  • Main principle
  • Superhet with RF-stage; ZF/IF 465 kHz
  • Tuned circuits
  • 7 AM circuit(s)
  • Wave bands
  • Broadcast, Long Wave and Short Wave.
  • Power type and voltage
  • Dry Batteries / 135 & 3 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 6.5 inch = 16.5 cm
  • Power out
  • 0.66 W (unknown quality)
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Silvertone 7-Tube Battery Radio Order= 57DM 4424 - Sears, Roebuck & Co.; Chicago
  • Shape
  • Tablemodel, Tombstone = decorative upright, not cathedral but can have rounded edges.
  • Dimensions (WHD)
  • 18.8 x 19.2 x 11.4 inch / 478 x 488 x 290 mm
  • Notes
  • The Silvertone model 4424 is the same as model 4425, except this model 4424 is using a 3 Volt "A" dry battery with the 1N1 automatic battery economizer. For details see schematic. Both models cover broadcast 545 to 1720 kHz, long waves (weather band) 220 to 400 kHz and short waves 5.6 to 17.5 MHz. Long waves are quite unusual for US models.
  • Price in first year of sale
  • 34.95 $
  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 7 = 1936 and before

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