www.alphacore.com
www.audiogon.com
www.audiogrid.com
www.buzzflash.com
www.cullencircuits.com
www.eichmanncables.com
www.fmoaudio.com  (site has guitar and amp information as well as tube
circuitry articles)
www.gottshall.com/squirrel  (squirrel information plus best college campuses for
squirrels)
www.hifichoice.co.uk
www.hificlassifieds.com
www.hifiplus.com
www.magnepan.com
www.maxjazz.com
www.morrowaudio.com
www.partsconnexion.com
www.positive-feedback.com
www.psaudio.com
www.quad-hifi.co.uk
www.silversonic.com  (dh labs)
www.sovtek.com
www.sphere.bc.ca  (lots of tubes listed under test equipment)
www.spielbergaudio.com
www.stereophile.com
www.theabsolutesound.com
www.tubesandmore.com (Antique Electronic Supply)
www.underwoodhifi.com
www.vacuumtubesinc.com
www.vibrapod.com
www.vtl.com
Please e-mail me if you find any broken links.  Thanks.