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ID = 19398
Brand: Triotron (tubes) = Brand of Schrack, Austria
Tube type:  Triode, vacuum   Detector 
Identical to A430N = REN904 = DW4011 = AG495 = A4110 = RV4100 = E428 = TL425 = TE24 = 70504
Similar Tubes
Normally replaceable-slightly different:
  AR4120 ; NU4

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 1 Ampere / Indirect / Specified voltage AC/DC
Information source - - Manufacturers Literature   Undated tube data sheet
Babani, International Radio Tube Encyclopaedia   p. 44 & 45
-- Collector info (Sammler)
A430N: M.F.
Manfred Fries

More ...
A430N: Telefunken Werkstattbuch
Wolfgang Bauer

A430N: Triotron Röhrenkatalog von 1942
Wolfgang Bauer

from Just Qvigstad

Usage in Models 2= 1933 ; 1= 1936?

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):3

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