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ET51

Information - Help 
ID = 31318
       
Country:
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Tube type:  Beam Switching Tube - incl. "Trochotron" 
Identical to ET51 = CV5277
Similar Tubes
Normally replaceable-slightly different:
  6700 ; MO-10
First Source (s)
Mar.1960 : - - Manufacturers Literature Preliminary Data Sheet

Filament Vf 6.3 Volts / If 0.3 Ampere / Indirect / Parallel, (AC/DC)
Description

TROCHOTRON.
Base B26A. Thermionic Decade Counting Tube which predates the gas-filled "dekatron" tubes.
Consisting of 30 electrodes the electron beam is steered with an external magnetic field. Counting speeds up to 1 MHz are attainable. Tubes had to be mounted at least 10 cm apart. This and the high cost of manufacture together with the advent of the dekatron made the use of the Trochotron not viable except for high speed counting. (RJ)
Operating principle of trochotron.

 
Dimensions (WHD)
incl. pins / tip
41 x 84 x mm / 1.61 x 3.31 x inch
Information source - - Manufacturers Literature   
 
cv5277_b.jpg
ET51: Private collection
Emilio Ciardiello

 
et51_s.png
ET51: Mullard
Günther Stabe † 19.8.20

 
et51_01.png
ET51: Manufacturer's Literature
Emilio Ciardiello



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