Antique radios, Old Time Radios
L427D
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Country:
Germany
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| Identical to |
L427D
= C443N
= PP431
= RES374
|
| First year |
1931
Tube leaflet collection E.Erb Analysis by original leaflets
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| First Source
(s) |
Aug.1931 : Funk Bastler 1931 Heft 33
|
| Predecessor Tubes |
L425D
PP430
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|
Successor Tubes
|
1933
L496D
|
| Base |
Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=Foo)
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| Filament |
Vf 4 Volts / If 0.25 Ampere / Direct |
| Description |
About 1930 the C443 was replaced by the C443N, which was capable of slightly increasing the output power from 2,8 to 3 Watts but associated by increasing the grid bias from -25 to -42 Volts.[Jacob Roschÿ, 2003-01-17]
Text in other
languages (may
differ)
|
| Tube prices |
2 Tube prices (visible for members
only)
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| Information source |
Taschenbuch zum Röhren-Codex 1948/49
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L427D: Telefunken Werkstattbuch
Wolfgang Bauer
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Just Qvigstad
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L427D: Valvo-Röhren-Daten 1934
Jacob Roschy
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):10
Collection of
Collection of a member from D |
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