• Pays
• Etats-Unis

• Fabricant / Marque
• Crosley Radio Corp.; Cincinnati (OH)

• Année
• 1922

• Catégorie
• Amplificateur BF ou mélangeur BF

• Radiomuseum.org ID
• 36641

Cliquez sur la vignette du schéma pour le demander en tant que document gratuit.

• No. de tubes
• 2

• Lampes / Tubes
• UV201 UV201

• Principe général
• Amplification audio; 2 Etage(s) BF

• Gammes d'ondes
• - sans

• Tension / type courant
• Piles (rechargeables ou/et sèches) / Storage Battery 6 & dry 45 Volt

• Haut-parleur
• - Ce modèle nécessite des HP externes

• Matière
• Boitier en bois

• De Radiomuseum.org
• Modèle: Two-Step Amplifier or 2-stage Audio Amp. [first version: front switch] - Crosley Radio Corp.;

• Forme
• Modèle de table boitier avec vouvercle

• Dimensions (LHP)
• 11.5 x 6 x 4.875 inch / 292 x 152 x 124 mm

• Remarques
• 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."

• Prix de mise sur le marché
• 25.00 $ +

• Source extérieure
• Ernst Erb

• Source
• Radio Collector`s Guide 1921-1932

• Littérature
• Radio Manufacturers of the 1920s, Vol 1 (pp.113, 115)

• Schémathèque (1)
• Radio Broadcast, May 1922, page 81

• Schémathèque (4)
• Radio News (February 1922, page 725.)

• D'autres Modèles

• Vous pourrez trouver sous ce lien 1791 modèles d'appareils, 1048 avec des images et 1282 avec des schémas.
  Tous les appareils de Crosley Radio Corp.; Cincinnati (OH)