Harko Senior Audion Receiver + Two-Step Amplifier Combination first version: front switch

Crosley Radio Corp.; Cincinnati (OH)

  • Year
  • 1922
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 212724

 Technical Specifications

  • Number of Tubes
  • 3
  • Main principle
  • TRF without regeneration
  • Tuned circuits
  • 1 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Storage and/or dry batteries / 6 & 22.5 & 45 Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Harko Senior Audion Receiver + Two-Step Amplifier Combination [first version: front switch] - Crosley Radio Corp.;
  • Shape
  • Tablemodel, Box - most often with Lid (NOT slant panel).
  • Notes
  • This is the early version of the "Harko Senior Audion Receiver + Two-Step Amplifier" combination. This combination was at least possible in February 1922 - with the first version of both sets - but we have the official ad for the combination in May 1922 as "Complete Receiving Station" in "Radio Broadcast" Vol. 1, No.1, page 81. The Harko Senior Audion Receiver, a "combined tuner and audion detector" has front switch and lid. In the middle of the two knobs for the two stations, there is a front panel switch to select one or two stages of amplification. Box has overhanging lid. By the way, there are at least three different versions regarding engraving: First version February 1922 with market introduction: straight without special logo: "Crosley two step amplifier" in one line. Second version May 1922 - engraving in two lines. Third version: Later or on the same time it was available without any engraving for the name. In 1923 it was not anymore on the market.

    Here is a link to some sources for this model.
    Later models have no such switch on the front and are a bit cheaper. The lid is integrated and without overhang. Those later models could be bought with or without engraving "Crosley Cincinnati TWO STEP AMPLIFIER" (including the logo) - with a price difference of one $.
  • Price in first year of sale
  • 41.00 $
  • Literature/Schematics (1)
  • Radio Broadcast, May 1922, p. 81
  • Literature/Schematics (2)
  • Radio Digest Illustrated, 1922 Jul. 08, p. 7
  • Author
  • Model page created by Ernst Erb. See "Data change" for further contributors.

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