Antique radios, Old Time Radios
Z220_4pin
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Country:
Great Britain (UK)
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| Identical to |
Z220_4pin
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| Similar
Tubes |
Other base:
Z220
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| Base |
Europe 4-Pin B4 (Eu A, E, 4A) 1914
Top contact with a cap.
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 2 Volts / If 0.2 Ampere / Direct / Battery = |
| Description |
Harries design using critical grid spacing.
gm=2.2mA/V; Po = 750mW.
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| Information source |
Taschenbuch zum Röhren-Codex 1948/49
- - Manufacturers Literature
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Just Qvigstad
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