08-06-2021, 05:53 AM
Thanks Amie, it'll happen to you one day for real, remember, it's downhill all the way : ) This is what I tell our Molly who's a bit younger than you in an effort to get her to not waste her youth.
Back to yon amp, put it all back together yesterday, not a whistle, chirp or other euphemism for oscillation. I've either done something right or the Gods feel benevolent at present.
I improved the HT decoupling - those three blue caps - and improved the ground bus. HT wise now all individual stages are de-coupled apart from the tone control hi gain stage and OP CF, which have one stage. Trying to fit all this in is a nightmare, there's plenty of room, but it's in the wrong place. One more ting, I re-jigged the tone control de-coupling too.
Pics attached to give some colour and interlude to waffle. There's still some tidying to do as you can see. I've used 100r in the last two de-coupling RC circuits as I don't want to drop V, just de-couple.
Thanks Peter for your help, Andy.
Back to yon amp, put it all back together yesterday, not a whistle, chirp or other euphemism for oscillation. I've either done something right or the Gods feel benevolent at present.
I improved the HT decoupling - those three blue caps - and improved the ground bus. HT wise now all individual stages are de-coupled apart from the tone control hi gain stage and OP CF, which have one stage. Trying to fit all this in is a nightmare, there's plenty of room, but it's in the wrong place. One more ting, I re-jigged the tone control de-coupling too.
Pics attached to give some colour and interlude to waffle. There's still some tidying to do as you can see. I've used 100r in the last two de-coupling RC circuits as I don't want to drop V, just de-couple.
Thanks Peter for your help, Andy.
