Are these the same Tung Sols that Schiit sells for $100 ? Have you asked them about noise ? Did you remove and reinstall the tubes in different sockets ? I run high efficiency speakers and my system is susceptible to pre amp tube noise , especially when I rotate in the higher power amps . I will get more hiss , vibration feedback , and a ting sound when unmuting . I Don’t have the Freya yet ( plan on one in about 2 months ). I also run isolation feet and Herbies dampeners . I’ve purchased from Upscale and consider them overpriced . I’ve also had a brand new Gold Lion KT-77 let go and damage an amp , so many things are possible. Good lunck, as I will be going there shortly . I will learn from you . Happy Listening , Mike.
Looking for thoughts/opinions on tube seller's response to my question...
Hi All!
I recently bought 4 balanced and matched reissue Tung Sol 6SN7GTB preamp tubes from a guy that I've bought 3 different sets of tubes from in the past (with no previous issue).
I rolled out the early Russian tubes that came with my Schitt Freya and rolled in the new Tung Sols. Immediately in system idle there is more noise in the form of hiss, scratchy air, etc. I ran the Tong Sols for maybe 15 hours or so. No change.
I emailed the seller to which he responded:
The 6SN7GTB can take a break in period in some applications. If you Google you will see this phenomena is common. Run them in your equipment for 24 houts and re-evaluate. New ones I exchange would have the same break-in period. The factory has indicated it has to do with the cathode coatings used to extend tube life. No problem returning them if the problem persists.
Have you heard of cathode coatings causing this issue? While I generally like NOS tubes a bit better than reissues, I've never had a new noisy reissue tube. Also, I really do like purchasing tubes from better stocked places like Upscale Audio because this issue never seems a problem. But when it comes to new reissues, I don't look first to Upscale. Maybe I should?
I'm running them in to see what happens. I'm not optimistic though.
I recently bought 4 balanced and matched reissue Tung Sol 6SN7GTB preamp tubes from a guy that I've bought 3 different sets of tubes from in the past (with no previous issue).
I rolled out the early Russian tubes that came with my Schitt Freya and rolled in the new Tung Sols. Immediately in system idle there is more noise in the form of hiss, scratchy air, etc. I ran the Tong Sols for maybe 15 hours or so. No change.
I emailed the seller to which he responded:
The 6SN7GTB can take a break in period in some applications. If you Google you will see this phenomena is common. Run them in your equipment for 24 houts and re-evaluate. New ones I exchange would have the same break-in period. The factory has indicated it has to do with the cathode coatings used to extend tube life. No problem returning them if the problem persists.
Have you heard of cathode coatings causing this issue? While I generally like NOS tubes a bit better than reissues, I've never had a new noisy reissue tube. Also, I really do like purchasing tubes from better stocked places like Upscale Audio because this issue never seems a problem. But when it comes to new reissues, I don't look first to Upscale. Maybe I should?
I'm running them in to see what happens. I'm not optimistic though.