Summary

Electronic counting valve. Manufactured by Mullard, Mitcham, England. Used in Geiger counters and scintillation counters. Could count up to a rate of 1MHz, 50 times faster than the fastest neon types. 6.3 V indirectly heated cathode.
The item was donated by RMIT Radio Engineering.

Physical Description

Black cylinder with dome on one end, enclosing glass bulb with 26 pin base. Magnetic.

More Information