"Mike Gilmour" wrote in message
...


Iain, I would add here to ensure all bias pots are fully down before
applying B+ !!!
I also find adding a bit of anode current helps the warmup time prior to
setting the bias.

I mentioned this because a friend of mine (not too clued up about valves)
actually put a new set of valves in with the bias set to provide him with
glowing anodes!!
its good to have some current through the valves during warm up as it
provides some load for B+




Set the bias after the amp has been switched on for about an hour, and
check it again after another couple of hours.

Exacamento


Cheers
Iain