tech websites

Does anyone know of any sites with discussion forums for those that roll their own tube or SS audio circuits? Preferably one that deals with the electricial engineering aspects as well as the subjective eccentricties we all enjoy. Thanks.
hifi57audio Sean
Intact Audio

Tube Cad Journal

Pete Millet

Things that make you say ouch

Steve Bench

oops, I just noticed you asked for discussion forums. Intact has a good one but the rest of the sites I listed have good info.