• Year
  • 1932–1934
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 58568

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

 Technical Specifications

  • Number of Tubes
  • 13
  • Main principle
  • Superhet with RF-stage; ZF/IF 172.5 kHz; 2 AF stage(s)
  • Tuned circuits
  • 8 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Alternating Current supply (AC) / 100-130 Volt
  • Loudspeaker
  • 3 Loudspeakers
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Sparton 28 Triolian - Sparks-Withington Co., Sparton
  • Shape
  • Console, Lowboy (legs < 50 %).
  • Dimensions (WHD)
  • 31.5 x 45.25 x 16 inch / 800 x 1149 x 406 mm
  • Notes
  • Bandfilter input circuits. Push-pull audio amplifier using 2 x 2 type 47 tubes in parallel. Inter-station noise suppressor. Three electrodynamic speakers, one (center) of 12 inch and the two of 8 inch diameter.

  • Price in first year of sale
  • 165.00 $
  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 4 = ca. 1934 and before

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The model Sparton 28 Triolian is part of the collections of the following members.

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