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ID = 11318
Brand: Valvo GmbH, Radioröhrenfabrik; Hamburg
Tube type:  Vacuum Pentode   Power/Output 
Identical to L425D = PP430 = C453 = C443 = RES364
Similar Tubes
Normally replaceable-slightly different:
  DW3 ; P425_Triotron ; TW425
First year 1929 Tube leaflet collection E.Erb Analysis by original leaflets
Successor Tubes L427D  

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=Foo)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.25 Ampere / Direct / Specified voltage AC/DC

Output pentode, first mentioned Nov. 1928, on market in early 1929
Equivalent types: C443 (Philips), RES364 (Telefunken ), PP430 (Tungsram).
Predecessors: B443, L415D, PP415.
Successors: 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.

Text in other languages (may differ)
Information source Taschenbuch zum Röhren-Codex 1948/49   and 1951
Hartmut Völler

More ...
L425D: Telefunken Werkstattbuch
Wolfgang Bauer

L425D: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector

from Just Qvigstad

Usage in Models 3= 1931

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

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