Intact Audio

Looks great, Dave!!

I'm using a 75TL as the output tube in my amp (class A2, single-ended.) It has an Rp of around 5.5K ohms for the bias I'm using. The tube draws 50ma and is fixed bias (at some point I would love to try you magnet wire resistors in place of the ones I have now.) John - I think you meant to say it's ...

how does it compare to either the tamura series fed or the ulbrich series fed with a large gap? dave Dave - Your OPTs with the wide gap sounded significantly better than the F-5002's (both conventional series fed). And, the Tamuras sounded better than the Ulbrichs (gapped by M. Ulbrich for 60ma), s...

The experiments were certainly very eye-opening to me. The way that John described it is not in any way over-dramatized. The differences among the small gap variations was VERY noticable and we all could tell when the sweet spot was reached without any head-scratching or debate - it was stark! My pe...

I've used Dave's autoformers for a variety of applications (preamp and speaker xover) and they always sound great!

I think it's a great idea, Dave! I have no idea what to expect soundwise, but I'm anxious to give it a go