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ID = 19827
Brand: Triotron (tubes) = Brand of Schrack, Austria
Tube type:  Screen-grid Tetrode 
Identical to S430N
Similar Tubes
Normally replaceable-slightly different:
  AS4100 ; AS4100D ; AS4120 ; AS494 ; AS495 ; E442 ; E446 ; E452T ; H4128D ; HP4100 ; HP4101 ; NCC4 ; RENS1204 ; RENS1264

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 Top contact screw type.
Filament Vf 4 Volts / If 1 Ampere / Indirect
Information source

s_8_g_10.gif S430N: W.Sprick: Austausch-Röhren-Lexikon 1947
Günther Stabe † 19.8.20

Just Qvigstad
S430N: Triotron Röhrenkatalog von 1942
Wolfgang Bauer

Collection of

Collection of a member from D


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