Antique radios, Old Time Radios
M504
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Country:
Netherlands
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| Identical to |
M504
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| Similar
Tubes |
Normally replaceable-slightly different:
B438
; HR410
|
| Base |
Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
|
| Filament |
Vf 4 Volts / If 0.1 Ampere / Direct / Battery = |
| Description |
Detector and LF amolification, resister coupling.
|
| Information source |
Taschenbuch zum Röhren-Codex 1948/49
- - Manufacturers Literature 1932
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M504
Peter den Boer
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Just Qvigstad
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M504: own collection
Peter den Boer
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