• País
• Estados Unidos

• Fabricante / Marca
• Sparks-Withington Co., (Sparton); Jackson, Michigan

• Año
• 1931

• Categoría
• Radio - o Sintonizador pasado WW2

• Radiomuseum.org ID
• 58629

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

• Numero de valvulas
• 10

• Válvulas
• 35 35 27 35 35 27 45 45 80 27

• Principio principal
• Superheterodino con paso previo de RF; ZF/IF 172.5 kHz; 1 Etapas de AF

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

• Gama de ondas
• OM (onda media) solamente

• Especialidades
• Tocadiscos-autom o no-no sabemos; Radio with other functions

• Tensión de funcionamiento
• Red: Corriente alterna (CA, Inglés = AC) / 100-130 Volt

• Altavoz
• Altavoz electrodinámico (bobina de campo)

• Material
• Madera

• de Radiomuseum.org
• Modelo: Sparton 45 Visionola - Sparks-Withington Co., Sparton

• Forma
• Consola alta, patas más largas del 50% .

• Ancho, altura, profundidad
• 32.75 x 51.5 x 24.75 inch / 832 x 1308 x 629 mm

• Anotaciones

• Early "Home Talking Movies" set (Movie, Radio Phonograph Combination) Visionola, introduced by Visionola Mfg. Corp., 60 East 42nd Street, New York, sold by Sparton (Sparks-Withington Co.). In February 1931 the model was featured by "Radio News". This was similar to Visivox from Sprague. Push-pull audio amplifier. Details can be read in "Radio News", February 1931 under "Radio points the way to Home Talking Movies". Similar is the Sprague Visavox. From each, only a few are left. See pictures at agassiztrading.com.
  Actually the system was developed in 1930 by using the new tube UY235, together with the 551 the first variable-mu tube. One has to know that tube manufacturers sent out new tubes for designing new circuits many months before the actual release, which was here June 1931 for the UY235. Therefore the model could not be on the market before, but advertised yes  ...
  A Canadian folder (in green) shows the following models together: 15, 24, 26, 30, 35, 40, 6, 9A, 10 and the Sparton Visionola.

• Peso neto
• 298 lb 0 oz (298 lb) / 135.292 kg

• Precio durante el primer año
• 575.00 $

• Ext. procedencia de los datos
• Ernst Erb

• Procedencia de los datos
• Radio Collector`s Guide 1921-1932

• Referencia esquema
• Rider's Perpetual, Volume 2 = 1932 (Models 1931/1932)

• Mencionado en
• Rider's 2-32, 2-33

• Documentación / Esquemas (1)
• Radio Retailing (Radio & Television R.) (January 1931, page 52.)

• Documentación / Esquemas (2)
• Radio News (February 1931,)

• Documentación / Esquemas (3)
• Sparton Radio Service Manual (Sparton Manual 1, Bulletin 41-1 to 16, Bulletin 33-3, 4)

• Otros modelos

• Donde encontrará 773 modelos, 361 con imágenes y 720 con esquemas.
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