radiomuseum.org

 
Please click your language flag. Bitte Sprachflagge klicken.

P420

Information - Help 
ID = 2919
       
Country:
Austria
Brand: Triotron (tubes) = Brand of Schrack, Austria
Developer: Triotron (tubes) = Brand of Schrack, Austria 
Tube type:  Vacuum Pentode   Power/Output 
  Ca. 1925 up to 1945 rare.
Identical to P420 = RES174d
Similar Tubes
Normally replaceable-slightly different:
  L415D ; L43
Other base:
  P420_5pin ; PP415

Base Europe 4-Pin (A, 4A, B4, since 1914) (Codex=Foo)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.15 Ampere / Direct / Battery =
Description

"Undistorted output 950mW" Advertisement December 2nd 1931

 
Literature - - Manufacturers Literature   1935
Taschenbuch zum Röhren-Codex 1948/49   
The Wireless World, London (WW, 79)
 
p420_triotron_lmp.jpg
P420: YBA
Bekir Yurdakul

 
p420_so.png
P420: rtt
Michael Schlör

 
p420data_1.png
P420: own collection
Peter den Boer


Usage in Models 1= 1931 ; 1= 1934? ; 1= 1937 ; 1= 1938

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):4


You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]
  
rmXorg