37-643X Early

Philco, Philadelphia Stg. Batt. Co.; USA

Data
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  • Year
  • 1936/1936
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 50548

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

 Technical Specifications

  • Number of Tubes
  • 7
  • Main principle
  • Superhet with RF-stage; ZF/IF 470 kHz
  • Wave bands
  • Broadcast plus more than 2 Short Wave bands.
  • Power type and voltage
  • Storage and/or dry batteries / 135, 90, 2, -3, & -9 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: 37-643X [Early] - Philco, Philadelphia Stg. Batt
  • Shape
  • Console with any shape - in general
  • Notes
  • The Philco model 37-643 series (1936-37) uses a 7-tube 3-band battery-powered chassis with shadow meter (tuning aid). The chassis is similar to that of its predecessor, the model 643 series (1935-36), but updated with newer octal tubes. Filament power is provided by either a 2-volt storage battery, or by a dry battery (presumably 3 volts) with a 1Z1 ballast tube inserted into a socket on the battery pack.

    There are three specific models in the series with different cabinet styles. Model 37-643B is a tombstone. The early version (1936) of model 37-643X is a console with inclined sounding board and six very short legs. The late version of 37-643X (1937) has a large U-shaped inclined panel including both the speaker and the control panel, and no legs.
  • Price in first year of sale
  • 115.00 $
  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 8 = 1937 and before

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