The GC10/4B is a cold cathode counting display tube. In use the discharge would cause one of the cathodes to glow and its position would indicate a number. The cathodes and guide electrodes are all arranged around a central common anode. The orange glow of the neon discharge allows the position of the discharge to be seen and thus functions as a indicator. An output pulse is achieved once for every ten input pulses allowing cascaded devices to form the digits of a decade counter.

To advance the display the inter cathode pin electrodes would be energised as would the next cathode. The discharge would walk to the next cathode using the pin as a guide.

The end window envelope is 28 mm in diameter, and excluding the IO base pins, is 86 mm tall.

 
Pin Connections

IO	1	2	3	4	5	6	7	8
	k(com)	kd	gu1	a	gu2	k(a)	k(b)	k(c)

 
Absolute Maximum Operating Conditions

Indicator	Va
	350

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 01 February 2008 {find valves by name}