Mike Reed
pfm Member
Oh I'm well aware of "it's" and "its" but whilst this will amaze many people even I'm not perfect
Not your expertise, Jez, but it is mine and it's a p.i.t.a. to proof-read everything and STILL get typos etc. going through; getting worse with aging sight and declining keyboard accuracy ! I get jumped on by the other unmentionable grammar queens if I make so much as a syntactic error !!!!!
The problem with your EAR gear is almost certainly a faulty power amp. Non of the things you concern yourself about are likely to have anything to do with the issue. Probably a faulty PL509 output valve.
Thanks for that. I transposed the significant ECC83 as directed by EAR but no difference. However, how can a PL509 be faulty if it's been perfect up to the fuse blow and can operate perfectly AND look/sound good for more than 2 hours as per yesterday. The only malfunction, if it is one, was the pop after a minute's warm-up (but only in the suspect amp.. The biassing LEDs were spot on from warm-up for the duration. Can that really be a faulty output valve?