STC G10/240E Unidirectional Decade Counter “Nomotron”
Tube compteur décimal
Dekadenzählröhre

STC = Standard Telephones and Cables, Limited.

Neon-filled unidirectional, decimal glow-transfer counting tube, which can count pulses from 0 to 20 kc/s.

Made from 1951.

It uses a single-phase input, as opposed to the three of the dekatron. The discharge is directed between the ten cathodes by means of special electrode shaping. The count state is visible through small holes in the front electrode, but the glow is small and rather hard to see.

• G. H. Hough, The development of a multi-cathode decade gas-tube counter, 1952.
• Adin B. Thomas, The principles and method of operation of some modern gas-filled counter tubes, Journal of the British Institution of Radio Engineers, Volume 13, Issue 8, August 1953.

 

Hauteur • Height • Höhe : 122 mm = 4" 13/16 & 111 mm = 4" 3/8
Diamètre • Diameter • Durchmesser : 45 mm = 1" 3/4 & 44 mm = 1" 3/4

 

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