• Paese
• USA (Stati Uniti d'America)

• Produttore / Marca
• Crosley Radio Corp.; Cincinnati (OH)

• Anno
• 1922

• Categoria
• Amplificatore audio o mixer audio

• Radiomuseum.org ID
• 36641

Clicca sulla miniatura dello schema per richiederlo come documento gratuito.

• Numero di tubi
• 2

• Valvole
• UV201 UV201

• Principio generale
• Amplificatore audio; 2 Stadi BF

• Gamme d'onda
• - senza

• Tensioni di funzionamento
• Batterie (di accumulatori e/o a secco) / Storage Battery 6 & dry 45 Volt

• Altoparlante
• - Questo apparecchio richiede altoparlante/i esterno/i.

• Materiali
• Mobile in legno

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

• Forma
• Soprammobile a cassapanca o cassetta, solitamente con coperchio (NON a leggio)

• Dimensioni (LxAxP)
• 11.5 x 6 x 4.875 inch / 292 x 152 x 124 mm

• Annotazioni
• 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."

• Prezzo nel primo anno
• 25.00 $ +

• Fonte esterna dei dati
• Ernst Erb

• Fonte dei dati
• Radio Collector`s Guide 1921-1932

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

• Letteratura / Schemi (1)
• Radio Broadcast, May 1922, page 81

• Letteratura / Schemi (4)
• Radio News (February 1922, page 725.)

• Altri modelli

• In questo link sono elencati 1807 modelli, di cui 1050 con immagini e 1301 con schemi.
  Elenco delle radio e altri apparecchi della Crosley Radio Corp.; Cincinnati (OH)