Antique radios, Old Time Radios
A1_Stal
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Country:
France
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Brand:
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Stal; (brand) |
| Tube type: |
Triode, vacuum Universal |
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Ca. 1925 up to 1945 rare. |
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| Identical to |
A1_Stal
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| Base |
Europe 4-Pin B4 (Eu A, E, 4A) 1914
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| Filament |
Vf 2 Volts / If 0.045 Ampere / Direct / Battery = |
| Description |
Amplification factor 10, internal resistance 19000 Ohm, slope 0.55 mA/V.
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| Information source |
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A1_Stal: Fin Stewart
Fin Stewart
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Just Qvigstad
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