Cut out because owner was connecting to speaker with lead connected to amp
and touched the plug-tip to guitar strings.
I cannot find anything wrong with it now.
I downloaded , something like the schematic version here from
http://www.britishaudioservice.com/s...2012%20band%20
series.pdf

I cannot see how any protection circuitry would work/ reset themselves in
this fault mode.
Anyone familiar with these amps.?
I'm surprised the Cockroft Walton pump cirrcuit is enough to power the HT of
the ECC83.

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/