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ID = 31870
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Tube type:  Transmitting Triode, air cooled 
Identical to TB4/1500 = 8078

Was used by Industrial
Filament Vf 5 Volts / If 32.5 Ampere / Direct

RF power triode intended for HF/VHF industrial heating. Thoriated-tungsten filamentary cathode, graphite anode. Tube must be operated in vertical position, base down. Depending upon the application, a moderate flow of air may be required from the base. 235 mm high by 130 mm diameter, 450 g weight.

- 500 W plate dissipation continuous service, up to 1.000 W intermittent service.
- 50 MHz max frequency
- 1.500 W typical RF output

Made by Philips and related firms. Registered to Amperex in US as 8078 in 1961.

Dimensions (WHD)
incl. pins / tip
130 x 235 x mm / 5.12 x 9.25 x inch
Weight 450 g / 15.87 oz
Information source - - Manufacturers Literature   
TB4/1500: Private collection
Emilio Ciardiello

More ...
TB4/1500: Valvo Spezialröhren 1972
Anonymous 10 Collector

TB4/1500: Manufacturer's Literature
Emilio Ciardiello

More ...

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