• País
• Estados Unidos

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

• Año
• 1933

• Categoría
• Radio - o Sintonizador pasado WW2

• Radiomuseum.org ID
• 139537

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

• Número de circuitos sintonía
• 3 Circuíto(s) AM

• 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 [Early ] - Philco, Philadelphia Stg. Batt

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

• 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.
  
  This is an early version with four controls by 3 knobs(separate controls for tuning, band, power, and volume). there is also a 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 $

• Procedencia de los datos
• Philco Radio 1928-1942

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

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

• Autor
• Modelo creado por Thomas Albrecht. Ver en "Modificar Ficha" los participantes posteriores.

• Otros modelos

• Donde encontrará 4019 modelos, 2215 con imágenes y 3667 con esquemas.
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