Fourier Panthare opinions

Anyone having a opinion on these amps I would like to hear it; thinking of a pair for my soundlab m2's.

rleff10-11-2007 3:48pm

atmasphere Details Discussions Posts This discussion Message User 11,850 posts 04-12-2013 at 04:22pm Copy Comment URL Report Comment Edit Delete Rleff, its OT but there are some simple mods that make the Sound Labs a lot easier to drive and also has them sounding better. Sound Lab also has a new backpanel that reflects what some of these mods are about. PM me if you are interested in the mods.
iknos Details Discussions Posts This discussion Message User 1 posts 09-05-2013 at 05:12pm Copy Comment URL Report Comment Edit Delete I restored a pair of this wonderfull Amps but i haven't any service manual , so i'll be happy if someone help me on bias procedure ; i don't know how ma for each tube
atmasphere Details Discussions Posts This discussion Message User 11,850 posts 09-10-2013 at 07:54pm Copy Comment URL Report Comment Edit Delete That amp uses 6C33s, but if I recall right runs them at a fairly high voltage too. I would try no more than 150ma per tube section. To do that I would start at 100 ma; the tubes will heat up over time. After an hour they can be considered to be at operating temperature so they should also be at the final bias current at that time. Good Luck!