Regenerative Receiver SR-21

Northwestern Radio Mfg. Co.; Portland, OR

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  • Year
  • 1922/1923
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 194144

 Technical Specifications

  • Number of Tubes
  • 3
  • Main principle
  • TRF with regeneration; 2 AF stage(s)
  • Tuned circuits
  • 2 AM circuit(s)
  • Wave bands
  • - without
  • Power type and voltage
  • Storage and/or dry batteries
  • Loudspeaker
  • - This model requires external speaker(s).
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Regenerative Receiver SR-21 - Northwestern Radio Mfg. Co.;
  • Shape
  • Tablemodel, Box - most often with Lid (NOT slant panel).
  • Notes
  • The Northwestern Radio Manufacturing Company's SR-21 was a 7-dial radio circa 1923. It is a 3-tube regenerative receiver, using three Type UV201A tubes (or one UV200A plus two UV201A) as a detector and a 2-stage audio amplifier.
  • Literature/Schematics (1)
  • Antique Radio 2005 article
  • Author
  • Model page created by Alan Larsen. See "Data change" for further contributors.

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