Same here dude.
I'm in Manchester, BTW. I bought a YaQin (not Yaoin, BTW) amp back
in summer 2004. Worked a charm and sounded beautiful for a few weeks,
and then BANG! Resistors started burning out, and that caused valves to
have internal firework shows, which caused further overcurrent.
Mine too has always been more of a PITA on the left channel, though
that'll only be coincidence.
Right now, the right-hand channel is fine. The left is ****ed; it just
sounds far too quiet, "scratchy" as you put it, and "early-clippy".
When it works/worked properly, it was like a beautiful, but
high-maintenance girlfriend: Fantastic and "Ooooooh!" but a moody
pain in the ****ing arse a lot of the time, that demands too much attention
when it really should be just cutting the crap and be getting on with letting
us both have a good time. That's the best analogy I can give.
Bummer, but I don't have a 'scope, so I've no real chance of fixing
it, I don't think.
I feel your pain!
Martin
--
M.A.Poyser Tel.: 07967 110890
Manchester, U.K.
http://www.livejournal.com/userinfo.bml?user=fleetie