Bell 1A / 1A1 amp module KS-14990
Western Electric Company Inc.; New York (NY)
- País
- Estados Unidos
- Fabricante / Marca
- Western Electric Company Inc.; New York (NY)
- Año
- 1954
- Categoría
- Amplificador de audio o mezclador
- Radiomuseum.org ID
- 222520
- Numero de valvulas
- 4
- Principio principal
- Amplificador de Audio
- Gama de ondas
- - no hay
- Tensión de funcionamiento
- Alimentado desde otro equipo o aparato principal.
- Altavoz
- - Este modelo usa altavoz exterior (1 o más).
- de Radiomuseum.org
- Modelo: Bell 1A / 1A1 amp module KS-14990 - Western Electric Company Inc.;
- Forma
- Chasis (tambien de autoradio)
- Ancho, altura, profundidad
- 3.5 x 2.1 x 3.5 inch / 89 x 53 x 89 mm
- Anotaciones
- Printed circuit board consists of two identical, 2-tube (3V4 and Raytheon CK512AX) amplifiers. It is used in Western Electric 1A and 1A1 speakerphone systems. It appears that one amplifier is used to amplify the dynamic microphone signal, the other to drive the moving coil permanent magnet speaker. Both amplifiers have a 1 Megohm potentiometer (each with a slot ended shaft) mounted on a common metal bracket on the side of the board opposite the 15 conductor card edge connector. Each amplifier has only one capacitor (apparently mica) located under the potentiometers. The amplifier plugs into a control unit (the 1A Speakerphone uses a KS 14964 or KS 14964 L2 control unit; the 1A1 Speakerphone uses a KS 14964 L3 or KS 16162 L2 control unit). The control unit runs on 120VAC power and provides the lower voltage filament and higher voltage power supplies to the KS-14990. All tubes plug into sockets. The Raytheon CK512AX subminiature tubes are held in place with spring retainer brackets.
- Peso neto
- 0.4 lb (0 lb 6.4 oz) / 0.182 kg
- Procedencia de los datos
- - - Manufacturers Literature
- Autor
- Modelo creado por Gary Brandenburger. Ver en "Modificar Ficha" los participantes posteriores.
- Otros modelos
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Donde encontrará 165 modelos, 142 con imágenes y 33 con esquemas.
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Colecciones
El modelo Bell 1A / 1A1 es parte de las colecciones de los siguientes miembros.