Antique radios, Old Time Radios
B400
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Country:
Netherlands
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| Identical to |
B400
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| Similar
Tubes |
Normally replaceable-slightly different:
W406_Marathon
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| Production stop |
Feb.1938 |
| Base |
Europe 4-Pin B4 (Eu A, E, 4A) 1914
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| Filament |
Vf 4 Volts / If 1 Ampere / Direct / Specified voltage AC/DC |
| Description |
Used for class B amplification. Va = 400 Volt max, Vg = 0 Volt. Plate dissipation 12 Watt max.
This tube is made as a Thermion Ultima 1936 B400 and as a Thermion Technica B400.
The Thermion Technica series is a line of power amplifiers and power rectifiers.
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| Information source |
- - Manufacturers Literature 1-9-1935
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Just Qvigstad
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B400: own collection
Peter den Boer
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