Antique radios, Old Time Radios
PT225_4pin
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Country:
Great Britain (UK)
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| Identical to |
PT225_4pin
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| Similar
Tubes |
Other base:
PT225
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| Base |
Europe 4-Pin B4 (Eu A, E, 4A) 1914
Sidecontact.
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 2 Volts / If 0.25 Ampere / Direct / Battery = |
| Description |
Pa <1.5W, Va=Vg2 <150V
Typ Ia=8mA, Ig2=2, Vg1=-6, Rload=18.7k, Pout=400mW.
Text in other
languages (may
differ)
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| Information source |
Wireless World (The), London (WW, 79) Nov 1934
- - Manufacturers Literature 1930
History of the British Radio Valve to 1940
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PT225_4pin: Fin Stewart
Fin Stewart
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Just Qvigstad
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PT225_4pin: own collection
Peter den Boer
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