Antique radios, Old Time Radios
PR4B
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Country:
United States of America (USA)
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| Identical to |
PR4B
= 204
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| Similar
Tubes |
Normally replaceable-slightly different:
TC2/250
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| Base |
Pin-and-blade jumbo (3 contacts)
Top contact with a cap.
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| Was used by |
Transmittertube (Radio) |
| Filament |
Vf 11 Volts / If 2 Ampere / Direct / Specified voltage AC/DC |
| Information source |
Universal Vade-Mecum, Electron Valves and Semiconductor Devices 1950 p65
Tube Lore (II) 29 & 214
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PR4B: Fin Stewart
Fin Stewart
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Just Qvigstad
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| Data Compliance |
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