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P520

Information - Help 
ID = 2921
       
Country:
Austria
Brand: Triotron (tubes) = Brand of Schrack, Austria
Tube type:  Vacuum Pentode   Power/Output 
Identical to P520
Similar Tubes
Normally replaceable-slightly different:
  L510D ; RES105
Heater different:
  PP610
Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eoo)
Was used by Radio/TV-reception etc.
Filament Vf 5 Volts / If 0.1 Ampere / Direct / Battery =
Information source Taschenbuch zum Röhren-Codex 1948/49   
 
p520_01.jpg
P520: Collection TL
Thomas Lebeth
 
4_34.png
P520: Telefunken Werkstattbuch
Wolfgang Bauer
 
triotron_1_3.png
P520: Triotron Röhrenkatalog von 1942
Wolfgang Bauer

from Just Qvigstad
Usage in Models 1= 1931 ; 1= 1936??
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):2
Collection of Thomas Lebeth (A)
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