Antique radios, Old Time Radios
7704
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Country:
Great Britain (UK)
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| Identical to |
7704
= QBL5/4000
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| First Source
(s) |
07.Jan.1963 : Electron Tube Registration List
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| Base |
TRANSMITTING & Power-TUBES/VALVES in gen
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| Was used by |
Transmittertube (Radio) |
| Filament |
Vf 6.3 Volts / If 32.5 Ampere / Direct / Specified voltage AC/DC |
| Description |
Pa <3kW with adequate forced air cooling.
Class C operation; Va <5.5kV at 30MHz, <4kV at 220MHz.
Output typically 4.1kW at 75MHz, 2.9kW at 220MHz.
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| Information source |
-- Original-techn. papers.
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