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ID = 2780
Brand: Sator (brand of Tungsram for tubes)
Tube type:  Diode-Tetrode 
Identical to NDS42 = E444 = RENS1254

Base Europe 6-Pin B6 (Hx B) 1933 (Codex=Le) Top contact with a cap.
Filament Vf 4 Volts / If 1.4 Ampere / Indirect / Parallel, (AC/DC)
Description Diode-Tetrode 
Dimensions (WHD)
incl. pins / tip
50 x 130 x mm / 1.97 x 5.12 x inch
Weight 60 g / 2.12 oz
Information source Taschenbuch zum Röhren-Codex 1948/49   
NDS42: Eigene Sammlung
Hermann Fleischanderl

NDS42: Telefunken Werkstattbuch
Wolfgang Bauer

NDS42: g.h.
Gerhard Heigl

from Just Qvigstad

Usage in Models 2= 1933

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

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