Two-Step Amplifier or 2-stage Audio Amp. first version: front switch
Crosley Radio Corp.; Cincinnati (OH)
- Country
- United States of America (USA)
- Manufacturer / Brand
- Crosley Radio Corp.; Cincinnati (OH)
- Year
- 1922
- Category
- Audio Amplifier or -mixer
- Radiomuseum.org ID
- 36641
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Tubes
- 2
- Main principle
- Audio-Amplification; 2 AF stage(s)
- Wave bands
- - without
- Power type and voltage
- Storage and/or dry batteries / Storage Battery 6 & dry 45 Volt
- Loudspeaker
- - This model requires external speaker(s).
- Material
- Wooden case
- from Radiomuseum.org
- Model: Two-Step Amplifier or 2-stage Audio Amp. [first version: front switch] - Crosley Radio Corp.;
- 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.)
- Other Models
-
Here you find 1784 models, 1047 with images and 1274 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Crosley Radio Corp.; Cincinnati (OH)
Collections
The model Two-Step Amplifier or 2-stage Audio Amp. is part of the collections of the following members.