Radios antiguas y Radios de Colección
M1004
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País:
Holanda
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| Idéntica a |
M1004
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| Válvulas similares |
Substituya normalmente -diferencia peq.:
B443
; L506
; PP415
; RES164d
|
| Fuente principal
(es) |
1930 : Radio-Expres, Netherlands
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| Base |
Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=Fo)
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| Filamento |
Vf 4 Volt / If 0.22 Ampere / Direct / Battery = |
| Descripción |
Gm=1.2 at Va=200, Amplification factor 200. (Radio-Expres 1930). To avoid the Philips patent of the penthode, Tungsram and Radio-Record made tetrode's with a penthode characteristic, This is neither a screen grid tetrode, nor a penthode. See base diagram. Also made with B4 base with sidecontact.
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Dimensiones
(Alt,Ancho,Prof.)
incl.pins/tip |
45 x 114 x 34 mm / 1.77 x 4.49 x 1.34 inch |
| Peso |
40 g / 1.41 oz |
| Literatura |
Taschenbuch zum Röhren-Codex 1948/49
Radio-Expres, Netherlands
- - Manufacturers Literature
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M1004: Tabu Röhren-Codex, 1948
Anónimo 15 Coleccionista
Mas ...
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Just Qvigstad
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M1004: own collection
Peter den Boer † 2025
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Colección personal de
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