Antique radios, Old Time Radios
R21_Radiotechnique
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Country:
France
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| Identical to |
R21_Radiotechnique
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| Base |
Europe 4-Pin B4 (Eu A, E, 4A) 1914
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| Filament |
Vf 3.8 Volts / If 0.7 Ampere / Direct / Battery = |
| Description |
The brand is Radiotechnique. The name of the tube is Radio-Ampli R21. Used as detector, HF and LF amplification.
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Dimensions (WHD)
incl. pins / tip |
38 x 100 x mm / 1.50 x 3.94 x inch |
| Information source |
- - Manufacturers Literature 1925
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Just Qvigstad
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R21_Radiotechnique: own collection
Peter den Boer
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