Radios antiguas y Radios de Colección
2-443
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País:
Holanda
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| Idéntica a |
2-443
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| Válvulas similares |
Substituya normalmente -diferencia peq.:
B443
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| Fin producción |
Feb.1938 |
| Base |
Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=Foo)
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| Filamento |
Vf 4 Volt / If 0.15 Ampere / Direct / Battery = |
| Descripción |
To avoid the Philips penthode patent, Thermion calls it a tetrode because the surpressor grid is connected to the grid instead of the kathode/filament. Nevertheless, this is a plug-in replacement for the B443.
Also available with B4 base + sidecontact.
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| Literatura |
Taschenbuch zum Röhren-Codex 1948/49
- - Manufacturers Literature 1933
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2-443
Peter den Boer † 2025
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Just Qvigstad
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2-443: own collection
Peter den Boer † 2025
Mas ...
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