Antique radios, Old Time Radios
I503
|
Country:
Netherlands
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| Identical to |
I503
|
| Similar
Tubes |
Normally replaceable-slightly different:
E438
|
| Production stop |
Feb.1938 |
|
Successor Tubes
|
5-438
|
| Base |
Europe 5-Pin , B5 (Eu O, F, O5A) 1928
|
| Filament |
Vf 4 Volts / If 1.1 Ampere / Indirect |
| Information source |
Universal Vade-Mecum, Electron Valves and Semiconductor Devices group 99
- - Manufacturers Literature 1931
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|
I503
Peter den Boer
|
Just Qvigstad
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I503: own collection
Peter den Boer
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Collection of
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