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P425_Triotron

Information - Help 
ID = 19956
       
Country:
Austria
Brand: Triotron (tubes) = Brand of Schrack, Austria
Tube type:  Vacuum Pentode   Power/Output 
Identical to P425_Triotron
Similar Tubes
Normally replaceable-slightly different:
  L425D ; M43 ; P443 ; PP415 ; PP430 ; RES364
Other base:
  P425_B4

Base Europe 5-Pin (O5A, B5)
Filament Vf 4 Volts / If 0.25 Ampere / Direct / Parallel, (AC/DC)
Description

"Undistorted output 1800mW" Advertisement December 2nd 1931

 
Literature Taschenbuch zum Röhren-Codex 1948/49   
The Wireless World, London (WW, 79)   Advertisement Dec 2 1931
 
pict0094.jpg
P425_Triotron: Karl Reiter
Karl Reiter

 
triotron_9.png
P425_Triotron: Triotron Röhrenkatalog von 1942
Wolfgang Bauer

 
triotron_7.png
P425_Triotron: Triotron Röhrenkatalog von 1942
Wolfgang Bauer


Usage in Models 2= 1933

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):2


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