On Sat, 19 Apr 2008 19:42:23 -0700 (PDT), EricM
wrote:


Forgot to mention that the 'buzzing' only starts after the relay
closes - so more evidence that it's either the 80/450's in the PS, or
possibly a problem somewhere around the voltage divider/0A2/6DR7
portion of the circuit that is fed from the 600V terminal in the amp.


Not possible that it is the relay itself that is mechanically buzzing
perhaps?

Peter