Antique radios, Old Time Radios
V257
| Base |
Octal (Int.Octal, IO) K8A, USA 1935
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 2 Volts / If 0.15 Ampere / Direct / Specified voltage AC/DC |
| Description |
All references point to this tube as equivalent to the "similar" tubes. No data has been found to confirm any other details.
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| Information source |
Universal Vade-Mecum, Electron Valves and Semiconductor Devices Page 36
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Just Qvigstad
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[rmxtube-en]
| Data Compliance |
More Information |
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