Please click your language flag. Bitte Sprachflagge klicken.


Information - Help 
ID = 34712
Great Britain (UK)
Brand: Ediswan, Siemens Edison Swan Electric Co.; London
Tube type:  Thyratron   Text 
Identical to CV2253 = 21A1
Similar Tubes
Normally replaceable-slightly different:

Base Octal (Int.Octal, IO) K8A, USA 1935
Was used by Military and/or Government
Filament Vf 6.3 Volts / If 0.95 Ampere / Indirect / Specified voltage AC/DC

Tetrode tube for use as a half wave Grid Controlled Rectifier at altitudes up to 50,000 feet. It is xenon filled.

Dimensions (WHD)
incl. pins / tip
35 x 85 x mm / 1.38 x 3.35 x inch
Information source - - Manufacturers Literature   Ediswan tube catalog January 1959

Just Qvigstad

Collection of



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]