Antique radios, Old Time Radios
4X250B
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Country:
United States of America (USA)
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Brand:
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Eimac (brand name) |
| Tube type: |
Transmitting Tetrode, air cooled beam power Power/Output |
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| Identical to |
4X250B
= QEL2/250
= CV2487
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| Base |
SPECIAL TUBEBASE in general
Top contact with a cap.
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| Filament |
Vf 6 Volts / If 2.6 Ampere / Indirect |
| Description |
Power grid tube with special 9 pin base.
Pa <250W, Va <2000. Audio and RF use up to 500 MHz. This was the most sold transmitting tube because it was cheap. It was used in the WW2 up to about 1980 and production was fully automatic (carousel) - material in - tube out! (EE: Information from Mr. Ackeret, Varian)
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Dimensions (WHD)
incl. pins / tip |
42 x 61 x mm / 1.65 x 2.40 x inch |
| Information source |
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4X250B: Valvo,Senderöhren, 1983
Anonymous 15 Collector
More ...
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4X250B: Valvo,Senderöhren, 1983
Anonymous 15 Collector
More ...
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):3
Collection of
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Variants
All ceramic version of the all glass 4X250B.
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