Antique radios, Old Time Radios
PM4
 |
| Identical to |
PM4
|
| Similar
Tubes |
Normally replaceable-slightly different:
SM94
Heater different:
RE134
Other base and data slightly different:
PM4_UX
|
| First Source
(s) |
1925 : British Radio Valves - The Vintage Years, Thrower p.57
1925 : Saga of the Vacuumtube, Tyne p.379
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|
| Base |
Europe 4-Pin (A, 4A, B4, since 1914) (Codex=Eo)
|
| Filament |
Vf 4 Volts / If: 0.15 Ampere / |
| Description |
PM4 is a British standard dull emitter valve. 4 Volts, output valve.
|
| Literature |
Taschenbuch zum Röhren-Codex 1948/49
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PM4: MULLARD PM4
Frank Cuffe
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PM4: Telefunken Werkstattbuch
Wolfgang Bauer
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| Usage in Models |
1= 1926 ; 1= 1927 ; 1= 1930?? ; 1= 1932?? |
| Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe): 4 |
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