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ID = 16842
Brand: Radioröhren-Laboratorium-GmbH, Gerd Nickel, (Ultra); Berlin
Developer: Radioröhren-Laboratorium-GmbH, Gerd Nickel, (Ultra); Berlin 
Tube type:  Gas Triode 
  <1925 rare.
Identical to UL550
First year 1925 Tube leaflet collection E.Erb Analysis by original leaflets

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Filament Vf 1.3 Volts / If 0.55 Ampere / Direct / Battery =
Description Daten vom Aufdruck auf der Röhrenbanderole 
Dimensions (WHD)
incl. pins / tip
30 x 75 x 30 mm / 1.18 x 2.95 x 1.18 inch
Weight 24 g / 0.85 oz
Tube prices 1 Tube prices (visible for members only)
Literature Taschenbuch zum Röhren-Codex 1948/49   
UL550: R.W.
Anonymous 762 Collector

UL550: own collection
Peter den Boer

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