Antique radios, Old Time Radios
25-550
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Country:
Netherlands
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| Identical to |
25-550
|
| Similar
Tubes |
Normally replaceable-slightly different:
F410
; T114
|
| Production stop |
Feb.1938 |
| Base |
Europe 4-Pin B4 (Eu A, E, 4A) 1914
|
| Filament |
Vf 4 Volts / If 2 Ampere / Direct |
| Description |
This is a tube from the Thermion Technica series of power amplifiers and power rectifiers.
|
| Information source |
- - Manufacturers Literature 1-9-1935
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- - -
- - -
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25-550: Telefunken Werkstattbuch
Wolfgang Bauer
|
Just Qvigstad
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25-550: own collection
Peter den Boer † 2025
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Collection of
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