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ID = 33899
Tube type:  Thyratron 
Identical to PL2D21 = 2D21 = PL21

Base Miniatur-7-Pin-Base B7G, USA 1940
Filament Vf 6.3 Volts / If 0.6 Ampere / Indirect / Parallel, (AC/DC)
Description Philips code for 2D21 or PL21. 
Information source - - Manufacturers Literature   7Z2 5116, June 1965
  PL2D21: Arlt-Katalog 1964/65 S.186
Günther Stabe † 19.8.20
PL2D21: Röhrensammlung
Hermann Fleischanderl

PL2D21: ARRL Handbook 1972
Michael Schlör

PL2D21: WIVEG Röhrenkatalog 1962
Hermann Fleischanderl

from Just Qvigstad

Usage in Models 1= 1958?? ; 1= 1960??

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

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