Antique radios, Old Time Radios
PM4
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Country:
Great Britain (UK)
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| Identical to |
PM4
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| Similar
Tubes |
Normally replaceable-slightly different:
SM94
Heater different:
RE134
Other base and data slightly different:
PM4_UX
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| First year |
1925
History of the British Radio Valve to 1940 p. 160
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| First Source
(s) |
1925 : British Radio Valves - The Vintage Years: 1904-1925 p.57
1925 : Saga of the Vacuum Tube, Tyne p.379
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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 4 Volts / If 0.15 Ampere / Direct / Battery = |
| Description |
PM4 is a British standard dull emitter valve. 4 Volts, output valve.
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| Information source |
Taschenbuch zum Röhren-Codex 1948/49
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PM4: Telefunken Werkstattbuch
Wolfgang Bauer
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Just Qvigstad
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):8
Collection of
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| Data Compliance |
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