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UD4_Triode

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ID = 29782
       
Country:
Austria
Brand: Triotron (tubes) = Brand of Schrack, Austria
Tube type:  Triode, vacuum   Audio Frequency 
Identical to UD4_Triode

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.1 Ampere / Direct / Specified voltage AC/DC
Information source - - Manufacturers Literature   1931 tube data booklet

b4_base_pins~~417.png UD4_Triode: Fin Stewart
Fin Stewart


Just Qvigstad
ud4.png
UD4_Triode: Funk-Bastler 1928, Heft 41
Hartmut Völler

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Usage in Models 1= 1930?

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

Collection of

 
e_trioton_ud4lr_2.jpg

UD4_Triode
 

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