"Fleetie" wrote in message
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"Fleetie" wrote
In new news: My valve amp has gone tits-up this evening. Well, the
left channel has. It's clipping REALLY early. A valve swap from
L -- R for all valves kept the fault in the left channel, i.e.
it didn't change sides, so I'm hoping a resistor in the left side
has burnt or something. PLEASE not a transformer fault.

I can't get the thing open! The screws are too tight!


Heat 'em up good with a soldering iron and try them when they've cooled back
down. (Presuming no plastic in the area, of course.....)


BUT luckily I can see down onto some of the PCB if I take the
output valves out. Sure enough, there's ONE blown-up resistor
visible in the left channel. Not a small one, but not huge.
I'd guess it's rated a watt or two.


Fit at least 2 or even 3 watt resistors and rip out the other side and
balance everything up in L/R pairs - won't cost more than a few quid and
will prevent the other side following suit.



I guess it's a cathode resistor but I can't tell, cos I can't see
much of the PCB.


From your earlier post re neighbours, I guess you've got the overhead to
spare - why not give a thought to re-biasing while you've got the bonnet up?
It'll take the pressure off and you'll never hear the difference.....