Running up to full mains, the oscillation goes, I've not tried deliberately
inducing oscillation despite temporary droppers in place. Both amps working
separately or normal but there is imbalance and crossover in the preamp
somehow that now needs looking at
--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/