Antique radios, Old Time Radios
PM252
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Country:
Great Britain (UK)
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| Identical to |
PM252
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| Similar
Tubes |
Normally replaceable-slightly different:
TB062
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| First Source
(s) |
1929 : History of the British Radio Valve to 1940 P. 150,160 & 165
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| Base |
Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 2 Volts / If 0.4 Ampere / Direct / Battery = |
| Description |
"Super Power" Valve. Gm= 3.7mA/V Ia=11.0 for Va=100 and -Vg=6.0. Optimum load 4.5k ohm. Early Mullard data gives filament current=0.3A.
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| Information source |
Taschenbuch zum Röhren-Codex 1948/49
Babani, International Radio Tube Encyclopaedia p. 130 & 131
- - Manufacturers Literature
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PM252: Fin Stewart
Fin Stewart
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Just Qvigstad
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PM252: Mullard Maintenance Manual 1954
Achim Dassow
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):4
Collection of
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