Steve wrote:
I bought a Chinese valve amp (Yaoin 300B job), on Ebay. Like this one:

http://cgi.ebay.co.uk/300B-High-End-...QQcmdZViewItem

It worked great for quite a while and I enjoyed the sound.
Now the left channel has gone dodgy. The music is still barely
"there", but all scratchy and weak. The right channel is fine.
I've swapped leads and connectors to establish that the
speakers/cables/CD player are not at fault. It definitely seems to be
the amplifier. The left output valve doesn't get as hot as the right
one. Swapping the valves indicates that the valve is not the problem.

Can anyone suggest a solution (other than using it as the world's
heaviest paperweight)?

I live in the North West of England. Is there anyone in the region
who could fix it?

Thanks for any help.

Steve

I'm in Stockport and restore valve radios as a hobby.
I'd be happy to look at it, and repair it if it's a fairly common component
at fault.
Martin.