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L425d

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ID = 1364
       
Country:
Germany
Brand: Valvo GmbH, Radioröhrenfabrik; Hamburg
Tube type:  Vacuum Pentode   Power/Output 
Identical to L425d

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928
Was used by Radio/TV-reception etc.
Filament
Description

Misspelling: should be L425D !

Output pentode / Endpentode, first mentioned Nov. 1928, on market in early 1929
Equivalent types: C443 (Philips), RES364 (Telefunken ), PP430 (Tungsram).
Predecessors / Vorgänger: B443, L415D, PP415.
Successors / Nachfolger: C443N, RES374, L427D, PP431.
The C443 was designed for AC mains operation only, it is capable of about twice the output power of the former B443. The equivalent types RES364 and PP430 appeared considerably later.

Fehlerhafte Schreibweise: sollte L425D heißen!

Die C443 war nur zum Betrieb an Wechselstrom vorgesehen und erreichte etwa die doppelte Ausgangsleistung der vorherigen B443. Die äquivalenten Typen RES364 und PP430 erschienen wahrscheinlich deutlich später.[Jacob Roschÿ, 2003-01-17]

 
 

Usage in Models 3= 1931

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):3

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