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ID = 20356
Brand: Radio-Record - Röhrenmarke; Holland
Tube type:  Current Regulator, Iron in Hydrogen 
  Ca. 1925 up to 1945 rare.
Identical to W20_Ballast
Similar Tubes
Normally replaceable-slightly different:
  452 ; R105

Base Europe 3-Pin B3 (Eu H)
Description I quer 1 System/A = 0.15 Umax V = 20
Auch von Philips und Tungsram erhältlich. 
Dimensions (WHD)
incl. pins / tip
45 x 98 x 32 mm / 1.77 x 3.86 x 1.26 inch
Weight 34 g / 1.20 oz
Information source Ballast Tube Handbook, The   
- - Manufacturers Literature   
W20_Ballast: Sammlung
Anonymous 557 Collector

More ...
W20_Ballast: Tabu Röhren-Codex, 1948
Anonymous 15 Collector

W20_Ballast: own collection
Peter den Boer

from Just Qvigstad

Collection of a member from D
Collection of a member from D

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