• País
• Estados Unidos

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

• Año
• 1934/1935

• Categoría
• Radio - o Sintonizador pasado WW2

• Radiomuseum.org ID
• 51088

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

• Numero de valvulas
• 10

• Válvulas
• 78 6A7 78 78 37 75 42 42 42 5Z3

• Principio principal
• Superheterodino con paso previo de RF; ZF/IF 260 kHz

• Gama de ondas
• OM y OC

• Especialidades
• Tocadiscos (sin cambiador autom)

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

• Altavoz
• Altavoz electrodinámico (bobina de campo)

• Potencia de salida
• 15 W (unknown quality)

• Material
• Madera

• de Radiomuseum.org
• Modelo: 509X Radio-Phonograph - Philco, Philadelphia Stg. Batt

• Forma
• Consola en general

• Anotaciones
• The Philco model 509X is a limited edition super deluxe high fidelity radio-phonograph using the same ten-tube two-band chassis as the 201X high fidelity radio. Only 500 units were built, and at a price of $600, were affordable only to the very rich.
  
  Like the model 201X, the 509X covers the BC and SW (4.2-12 MHz) bands and has variable IF bandwidth to trade off selectivity versus fidelity, controlled by a three-gang potentiometer to adjust the Q of two of the three IF transformers and the gain of both IF stages. Unlike most radios of its day, which were restricted to about 4 kHz of audio bandwidth, the 509X, like the 201X, has 7.5 kHz of bandwidth at its maximum fidelity setting. The circuit includes a 10 kHz audio filter to remove the high pitched heterodyne that could be caused by the carrier of an adjacent channel. In addition to the fidelity-selectivity control, which functions somewhat like a treble control, there is a bass compensation switch. The chassis has a shadow meter (tuning aid) with its own dedicated control tube (unlike other Philco designs where the shadow meter simply indicates B+ current to the RF and/or IF stages). The push-pull output stage, with one 42 driver tube and two 42 output tubes, delivers 15 watts of undistorted output.
  
  

• Precio durante el primer año
• 600.00 $

• Ext. procedencia de los datos
• Ernst Erb

• Procedencia de los datos
• Philco Radio 1928-1942

• Referencia esquema
• Rider's Perpetual, Volume 6 = 1935 and before

• Mencionado en
• Philco Radio 1928-1942

• Documentación / Esquemas (1)
• Philco 1928-36 Wiring Diagrams, Parts Lists, and Essential Service Data

• Otros modelos

• Donde encontrará 4086 modelos, 2222 con imágenes y 3734 con esquemas.
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