Geiger-Muller tube is a gas-filled tube with electrodes. It is used to detect and measure ionizing radiation.
A glass cylinder enclosing a silver-coloured metal cylinder with a 4 - pin connection at one end. Two of the pins are connected by a piece of fused wire. There is a handwritten number on the glass and a yellowed, typewritten label stuck on with adhesive tape.
20th Century Electronics, England, Great Britain, 1950-1960
Celestion information - http://www.celestion.com/information.html - and - http://www.culturegrid.org.uk/static/showResource/3169634 - accessed 20 Oct 2011
On glass: " KK 770 " On label: " Type G.10H / Operate at / 380 volts / No. KK 770 / Made in / Englanf [sic] " Around connector: " AMPHENOL-CELESTION BRISTISH-MADE PAT PEND. "
Type of item
195 mm (Length)