Quote:
Originally Posted by fezz parka
Hum coming from the speaker means the power section is alive. Since the problem showed up after tube swapping, check all solder joints on the noval tube sockets. You could have knocked a cold one loose. Check v1 and v2.
|
BINGO!!
A wire on V2 (pin 2) had come loose, and on re-attachment everything is back to normal!! Looks like I haven't fried the PT...
On a slightly different point, I took the opportunity to check B+ voltage, and it's 415V! I've got a Sovtek in there, is that the only issue? I've got a Jan Philips 5Y3 on the way, so I'll take a reading as soon as it comes.
Thanks for all the help!