• País
• Estados Unidos

• Fabricante / Marca
• Philco, Philadelphia Stg. Batt. Co.; USA

• Año
• 1933

• Categoría
• Radio - o Sintonizador pasado WW2

• Radiomuseum.org ID
• 51170

Haga clic en la miniatura esquemática para solicitarlo como documento gratuito.

• Numero de valvulas
• 4

• Válvulas
• 77 77 42 80

• Principio principal
• Superheterodino en general; ZF/IF 460 kHz; Super, reaction, but not adjustable

• Gama de ondas
• OM y banda pesquera (USA = tropical/marina/policia) = 150-200m

• Tensión de funcionamiento
• Red: Corriente alterna (CA, Inglés = AC) / 115 Volt

• Altavoz
• Altavoz electrodinámico (bobina de campo)

• Material
• Madera

• de Radiomuseum.org
• Modelo: 81Junior [Late ] - Philco, Philadelphia Stg. Batt

• Forma
• Sobremesa tipo Capilla (upright, round top or pinted arch, not rounded edges only).

• Ancho, altura, profundidad
• 12 x 14 x 8 inch / 305 x 356 x 203 mm

• Anotaciones

• The 80 series models (models 80, 81, and 84) were referred to as "Philco Junior" and were inexpensive entry-level radios employing a superheterodyne circuit with a regenerative stage to increase gain in the absence of an IF amplifier stage.
  
  Model 81B is a cathedral with a simple flat-front cabinet. An improvement it offered over the previous model 80B is the inclusion of a second band (police band, 1.5 - 2.8 MHz) with a very simple circuit, in which the oscillator tunes the same range for both bands, and only the front-end RF coil is switched, resulting in the second band being shifted upward in frequency by 920 kHz (twice the IF frequency of 460 kHz). The dial range is extended to accommodate the additional span of the police band.
  
  There was an early version with four controls by 3 knobs (separate controls for tuning, band, power, and volume) and this later version with three controls by 2 knobs (power and volume combined).

  There was also an export chassis version 81F (or possibly 81E) for 220 V power.

• Precio durante el primer año
• 19.00 $

• Ext. procedencia de los datos
• Ernst Erb

• Procedencia de los datos
• Collector's Guide to Antique Radios 4. Edition

• Referencia esquema
• Rider's Perpetual, Volume 3 = 1933 and before

• Mencionado en
• Guide to Old Radios (Philco Radio 1928-1942 (Ramirez))

• Documentación / Esquemas (1)
• Rider's Perpetual, Volume 8 = 1937 and before (Philco 1928-36 Wiring Diagrams, Parts Lists, and Essential Service Data)

• Otros modelos

• Donde encontrará 4017 modelos, 2212 con imágenes y 3664 con esquemas.
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