The GC10/4B is a cold cathode bi-directional decade counting & display tube with intermediate outputs. 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. The maximum input pulse rate is 4,000 pulses per second.
The ceramic discs contain the contact rings tat the common guides are joined to.
The direct equivalence with the CV1739 is given by having both designations on the envelope.
The viewing window.
The standard IO base cap.
The end window envelope is 29 mm in diameter, and excluding the IO base pins, is 85 mm tall.