Short Wave Regenerative Tuner Type SR-1

Northwestern Radio Mfg. Co.; Portland, OR

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  • Year
  • 1921/1922
  • Category
  • Radio module pre 1926 (not a part, not a key)
  • Radiomuseum.org ID
  • 194125

 Technical Specifications

  • Main principle
  • RF-Circuit or wave trap (separate, can also be an antenna with amp.); Reaction
  • Tuned circuits
  • 2 AM circuit(s)
  • Wave bands
  • Wave Bands given in the notes.
  • Power type and voltage
  • No Power needed
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Short Wave Regenerative Tuner Type SR-1 - Northwestern Radio Mfg. Co.;
  • Shape
  • Tablemodel, Box - most often with Lid (NOT slant panel).
  • Dimensions (WHD)
  • 12.75 x 10.5 x 0 inch / 324 x 267 x 0 mm
  • Notes
  • The Northwestern Radio Manufacturing Company's Model SR-1 Regenerative tuner cover the 160-900 meters wavelength range. The primary circuit of the receiver consisted of a variable inductance in series with the antenna tuning capacitor. The switch controlling the tapped inductance was on the back of the panel. An antenna capacitor connected across the front binding posts in parallel with the primary coil allowed the listener to receive lower frequencies with a shorter antenna. The secondary circuit is tuned by the SR-7 Variometer connected in series with the SR-8 Variocoupler. When shunted by a small fixed capacitor furnished with each receiver, the secondary circuit allowed reception of maritime stations on long wavelengths. Regeneration resulted by tuning the plate circuit with a second SR-7 variometer.
  • Net weight (2.2 lb = 1 kg)
  • 13 lb (13 lb 0 oz) / 5.902 kg
  • Price in first year of sale
  • 60.00 $
  • Literature/Schematics (1)
  • Northwestern Radio Catalog circa 1921-1922
  • Author
  • Model page created by Alan Larsen. See "Data change" for further contributors.

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