"Paul Burridge" wrote in message
...
Hi all,

what's one of these used for/capable of?

http://cgi.ebay.co.uk/ws/eBayISAPI.d...18047 17&rd=1


Think of it as a switch that turns on when the voltage across it gets high
enough. Used in charging, and abruptly discharging, high-voltage capacitor
banks. See also "ignitron".