The GC10B/1 is a cold cathode counting and display tube. The orange display comes from the neon gas inside. This tube has a central common anode. The discharge would cause one of the cathodes to glow and its position would indicate a number. To advance the display the inter cathode pin electrode(s) would be energised and so would the next cathode. The discharge would walk to the next cathode using the pin(s) as a guide.

The end window envelope is 27 mm in diameter and, excluding the IO base pins, is 84 mm tall.

 
Absolute Maximum Operating Conditions

Indicator	Va	mAa
	300	0.5

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 02 February 2008 {find valves by name}