IN YOUR EXPERIENCE ?? WHAT IS THE QUIETEST 12AX7 TYPE TUBE ??? 6072 ? Spiral Filament

I'm looking for the quietest 12ax7 style tube you have used....Not what you heard about , but what you have personally used.......Thanks Will

autospec12-10-2018 6:54pm

jperry Details Discussions Posts This discussion Message User 2,458 posts 12-10-2018 at 07:09pm Copy Comment URL Report Comment Edit Delete The quietest 12AX7 tubes I had were selected RCA NOS from Andy at Vintage Tube Services
stereo5 Details Discussions Posts This discussion Message User 6,480 posts 12-10-2018 at 07:25pm Copy Comment URL Report Comment Edit Delete The quietest tubes I have heard are the McIntosh branded 12ax7 tubes that came with my McIntosh C2500 preamp. Dead silent, even with the volume control at max, not a peep from the speakers. Not sure who makes the tubes but my guess would be JJ?
bdp24 Details Discussions Posts This discussion Message User 9,957 posts 12-10-2018 at 07:33pm Copy Comment URL Report Comment Edit Delete 5751, I don't recall the brand. Whatever Frank Van Alstine was putting in his modded-Dynaco PAS pre-amp in the 1980's. Zero hum, and just a hint of tube rush with the volume control at max.
geoffkait Details Discussions Posts This discussion 23,365 posts 12-10-2018 at 07:44pm Copy Comment URL Report Comment Edit Delete I had a man on the inside at NASA maintenance in the 70s and 80s who provided me with a steady stream of Miltary grade 12AX7WA tubes, Sylvania and RCA, these are the quietest I.e., low noise 12AX7s I’ve tried although Telefunkens are not chopped liver. Even the low microphonic tubes, however, benefit from Herbies tube dampers. So, you’re never totally in the clear.