Antique radios, Old Time Radios
2-443
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Country:
Netherlands
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| Identical to |
2-443
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| Similar
Tubes |
Normally replaceable-slightly different:
B443
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| Production stop |
Feb.1938 |
| Base |
Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=Foo)
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| Filament |
Vf 4 Volts / If 0.15 Ampere / Direct / Battery = |
| Description |
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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| Information source |
Taschenbuch zum Röhren-Codex 1948/49
- - Manufacturers Literature 1933
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2-443
Peter den Boer
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Just Qvigstad
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2-443: own collection
Peter den Boer
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