ID:
264
Maker's Name:
20th Century Electronics
Where made:
England
Dimensions:
48 × 3.5 × 3.5 cm
Vapour-filled glass tube under low pressure, with a cathode wire running along the tube axis. The anode is a graphite coating on the inside of the tube. A voltage of 1300 Volts is applied across the tube. Particles, mainly high-speed electrons (beta particles) passing thru the tube ionise the vapour and initiate a momentary discharge in the tube.
