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U4520

Information - Help 
ID = 18278
       
Country:
Germany
Brand: Osram GmbH KG; Berlin
Tube type:  Current Regulator, Urdox without FeH 
Identical to U4520
Similar Tubes
Normally replaceable-slightly different:
  U4520-4 ; U4520/5 ; U4520/6
Other base:
  U4520/G

Base Europe side contact P8A (Au P, 8SC) (Codex=S)
Filament
Description

200mA bei 40...50V
Max. Netzspannung: 240V

 
Information source Taschenbuch zum Röhren-Codex 1948/49   
Ballast Tube Handbook, The   

u_4520.png
U4520: TFK 8000 GWK
Egon Strampe

189a_1.png U4520: Telefunken Werkstattbuch
Wolfgang Bauer


Just Qvigstad
u4520_spec.png
U4520: Osram, Liste #60, 1937
Anonymous 15 Collector

Usage in Models 1= 1938

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1
 

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