Antique radios, Old Time Radios
25-450
|
Country:
Netherlands
|
|
| Identical to |
25-450
|
| Similar
Tubes |
Normally replaceable-slightly different:
F704
; T730
; W704
|
| Production stop |
Feb.1938 |
| Base |
Europe 4-Pin (A, 4A, B4, since 1914)
|
| Filament |
Vf 7.5 Volts / If 1.25 Ampere / Direct |
| Description |
This is a tube from the Thermion Technica series of power amplifiers and power rectifiers.
|
| Literature |
- - Manufacturers Literature 1-9-1935
- - -
- - -
- - -
|
|
|
 |
|
25-450: rtt
Michael Schlör
|
| |
|
25-450: own collection
Peter den Boer
|
|
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