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Two-Step Amplifier or 2-stage Audio Amp. first version: front switch

Two-Step Amplifier or 2-stage Audio Amp. ; Crosley Radio Corp.; (ID = 1170429) Ampl/Mixer
Two-Step Amplifier or 2-stage Audio Amp. ; Crosley Radio Corp.; (ID = 820539) Ampl/Mixer Two-Step Amplifier or 2-stage Audio Amp. ; Crosley Radio Corp.; (ID = 820540) Ampl/Mixer
Two-Step Amplifier or 2-stage Audio Amp. ; Crosley Radio Corp.; (ID = 820542) Ampl/Mixer Two-Step Amplifier or 2-stage Audio Amp. ; Crosley Radio Corp.; (ID = 820544) Ampl/Mixer
Two-Step Amplifier or 2-stage Audio Amp. ; Crosley Radio Corp.; (ID = 820546) Ampl/Mixer Two-Step Amplifier or 2-stage Audio Amp. ; Crosley Radio Corp.; (ID = 857505) Ampl/Mixer
Two-Step Amplifier or 2-stage Audio Amp. ; Crosley Radio Corp.; (ID = 1159840) Ampl/Mixer Two-Step Amplifier or 2-stage Audio Amp. ; Crosley Radio Corp.; (ID = 1183848) Ampl/Mixer
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Two-Step Amplifier or 2-stage Audio Amp. ; Crosley Radio Corp.; (ID = 820539) Ampl/Mixer
Crosley Radio Corp.;: Two-Step Amplifier or 2-stage Audio Amp. [Ampl/Mixer] ID = 820539 933x524
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For model Two-Step Amplifier or 2-stage Audio Amp. first version: front switch, Crosley Radio Corp.; Cincinnati (OH):
This is the first version of the Crosley Two-Step audio Amplifier. The switch to select 1 or 2 stages of amplification was only used on this model. The amp used the overhanging lid style cabinet as was used on the first Harko Senior receivers. This amp was built to match the first generation of Harko Senior radios.
 
Country:  United States of America (USA)
Manufacturer / Brand:  Crosley Radio Corp.; Cincinnati (OH)
Year: 1922 Category: Audio Amplifier or -mixer
Valves / Tubes 2: UV201 UV201
Main principle Audio-Amplification; 2 AF stage(s)
Wave bands - without
Details
Power type and voltage Storage and/or dry batteries / Storage Battery 6 & dry 45 Volt
Loudspeaker - This model requires external speaker(s).
Power out
from Radiomuseum.org Model: Two-Step Amplifier or 2-stage Audio Amp. [first version: front switch] - Crosley Radio Corp.;
Material Wooden case
Shape Tablemodel, Box - most often with Lid (NOT slant panel).
Dimensions (WHD) 11.5 x 6 x 4.875 inch / 292 x 152 x 124 mm
Notes This is the early version of the "Two Step Amplifier" as it was officially called in ads. It is sometimes named 2-stage audio amplifier (or Amp.). 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. 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 $.

The first catalog, early 1922, tells us that the two-step Amplifier can also be bought unmounted for $ 22.50 instead of $ 25 - and that the "amplifier cabinet is designed to match up uniformly with either the CROSLEY Detector Unit, the HARKO JUNIOR or the HARKO SENIOR."
Price in first year of sale 25.00 $ +
External source of data Ernst Erb
Source of data Radio Collector`s Guide 1921-1932
Mentioned in Radio Manufacturers of the 1920s, Vol 1 (pp.113, 115)
Literature/Schematics (1) Radio Broadcast, May 1922, page 81
Literature/Schematics (4) Radio News (February 1922, page 725.)


All listed radios etc. from Crosley Radio Corp.; Cincinnati (OH)
Here you find 1680 models, 1006 with images and 1158 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.




  
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