Please click your language flag. Bitte Sprachflagge klicken.


Information - Help 
ID = 29330
Brand: Narva, VEB; Kombinat; Oberweißbach (Ostd.)
Developer: Narva, VEB; Kombinat; Oberweißbach (Ostd.) 
Tube type:  Geissler Crookes Elster-Geitel Hittorf   Text 
Identical to SKR2

Base Duodecal (12-pin), B12A (not glass)
Filament Vf 4 Volts / Half indirect / Specified voltage AC/DC

Electron flow windmill. Demo unit built to show the properties of electrons, making a small metal-vane propeller to rotate when hit by an electron beam. This was a common item in the physics laboratories of technical scools in the past century. It operated with an accelerating voltage as low as 350 V.

Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
125 x 125 x 220 mm / 4.92 x 4.92 x 8.66 inch
Weight 190 g / 6.70 oz
Tube prices 4 Tube prices (visible for members only)
Information source - - Manufacturers Literature   
SKR2: eigene Sammlung
Gerhard Eisenbarth

More ...
SKR2: Private collection
Emilio Ciardiello

More ...

from Just Qvigstad

You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]