Antique radios, Old Time Radios
R620
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Country:
Netherlands
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| Identical to |
R620
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| Production stop |
1927 |
| Base |
Europe 4-Pin B4 (Eu A, E, 4A) 1914
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 4 Volts / Direct / Battery = |
| Description |
Lf amplification, resistor coupling. Amplification = 20, slope = 0.5 mA/V, internal resistance = 40.000 Ohm
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| Information source |
Radio Wereld, The Netherlands 24-2-1927
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R620
Peter den Boer
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Just Qvigstad
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| Data Compliance |
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