Antique radios, Old Time Radios
M1004S
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Country:
Netherlands
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| Identical to |
M1004S
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| Base |
Europe 4-Pin B4 (Eu A, E, 4A) 1914
Sidecontact.
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| Filament |
Vf 4 Volts / If 0.1 Ampere / Direct / Specified current DC = (Series working) |
| Description |
Tungsram and Radio Record made tetrodes with a penthode characteristic to avoid the Philips patent of the penthode.
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| Information source |
- - Manufacturers Literature 1933
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M1004S
Peter den Boer † 2025
More ...
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Just Qvigstad
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M1004S: own collection
Peter den Boer † 2025
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