WAD HD83 hum - help please

[John Caswell]

Hi Adrian,
Excellent work curing the hum.
I suggest that you go back to the basic HD83 to see what it sounds like ( which is pretty damn good!) and then see if adding boutique compnents improves the sound.
I have also found that if you use it with it wired for high impedance 'phones you may need need a Zobel network actross the output terminals. A 0.1µF in series with 10R works wonders

John aka Dr John

[buddam]

Colin and John, many thanks. I'm about to offer for the toroid!

Adrian

[Primalsea]

Have a look at the Earth Loopy Hum post for some info on this