 |
| Identical to |
C443N
= PP431
= L427D
= RES374
|
| First Series |
1930 Tube leaflet collection E.Erb Analysis by original leaflets |
| First Source
(s) |
1930 : -- Collector info (Sammler)
|
| Predecessor Tubes |
C443
PP430
|
| Successor Tubes |
1929
E443
|
|
| Base |
Europe 5-Pin (O5A, B5) (Codex=Foo)
|
| Filament |
If: 0.25 Ampere /
Vf 4 Volts /
|
| 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)
|
| Literature |
Taschenbuch zum Röhren-Codex 1948/49
|
|
|
| |
|
| |
ficha de valvulas
Getulio Jimenez-Gomez
|
|
|
|
Aus eigener Sammlung
Pim J.H. Vercoulen
|
|
Telefunken Werkstattbuch
Wolfgang Bauer
|
|
RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector
|
|
|
