Antique radios, Old Time Radios
7RR3
Country:
Great Britain (UK)
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Identical to |
7RR3
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Base |
Wires
Wires only.
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Was used by |
Military and/or Government |
Filament |
Vf 15 Volts / If 8 Ampere / Direct / Specified voltage AND current AC/DC |
Description |
500 watt transmitting tube, first made September 1919
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Information source |
- - Manufacturers Literature
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Data Compliance |
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