Predicta Holiday G4242M Ch= 9L37
Philco, Philadelphia Stg. Batt. Co.; USA
- País
- Estados Unidos
- Fabricante / Marca
- Philco, Philadelphia Stg. Batt. Co.; USA
- Año
- 1959 ?
- Categoría
- Televisión (TV) o monitor
- Radiomuseum.org ID
- 104838
Picture tube has been rebuilt.
Aus PHILCO-Werbung
Thanks for Mr.Szép András Hungary.
Haga clic en la miniatura esquemática para solicitarlo como documento gratuito.
- Numero de valvulas
- 16
- Principio principal
- Superheterodino en general; ZF/IF 45750 kHz
- Gama de ondas
- Bandas de recepción puestas en notas.
- Tensión de funcionamiento
- Red: Corriente alterna (CA, Inglés = AC) / 110-120 Volt
- Altavoz
- Altavoz elíptico de imán permanente. / Ø 4 inch = 10.2 cm
- Material
- Materiales diversos
- de Radiomuseum.org
- Modelo: Predicta Holiday G4242M Ch= 9L37 - Philco, Philadelphia Stg. Batt
- Forma
- Sobremesa de cualquier forma, detalles no conocidos.
- Ancho, altura, profundidad
- 23.5 x 27.5 x 14.5 inch / 597 x 699 x 368 mm
- Anotaciones
- The Philco G4242M is a 21" b/w TV with US standard VHF tuner channels 2 thru 13. Equipped with chassis 9L37, VHF tuner T-68G and picture tube 21EAP4 or SF21A. Cabinet is Mahogany. Swiveling top-mount CRT enclosure. Built-in telescoping antenna. NOTE: a common replacement CRT for the 4242 is the 21FDP4 (this requires a slight mod to the filament circuit as it is a 6.3V heater as compared to the original 2.3V; the mod: a short across the 8 ohm section of the filament resistor)
- Procedencia de los datos
- - - Data from my own collection
- Documentación / Esquemas (1)
- Photofact Folder, Howard W. SAMS (Set 439 Folder 1 4-1959)
- Documentación / Esquemas (2)
- - - Manufacturers Literature
- Autor
- Modelo creado por Thomas Albrecht. Ver en "Modificar Ficha" los participantes posteriores.
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Contribuciones en el Foro acerca de este modelo: Philco, Philadelphia: Predicta Holiday G4242M Ch= 9L37
Hilos: 1 | Mensajes: 1
In order to make the picture tube housing more compact for its Predicta line of TVs, Philco created a new cathode ray tube (CRT) design with a very compact electron gun and a short tube neck. Unfortunately, CRTs with this new design turned out to have a very short life. CRTs failed after only a few years of use, severely damaging Philco's reputation in the TV business, and contributing to Philco's exit from the TV business and sale of the company to Ford.
Today, almost all Predictas which have the original tube intact have low emission on the CRT. When testing, be careful, since the 21EAP4/SF21A CRT has a 2.5 volt heater (unlike almost all other CRTs from that era, which have 6.3 volt heaters). Applying 6 volts can burn out the heater. If the CRT is bad, there are several companies that rebuild CRTs, and the Predicta, with its relatively high value among collectors, is one of the few sets for which CRT rebuilding makes economic sense.
Tom
Thomas Albrecht, 03.Sep.06