Balanced Audio Technology MK-30 tubes. Alternative to Sovtek 6922

Buy the Gold Lion 6922, sure Genelex never even made a 6922 but it is a great tube .   When using a single dual triple make sure you get one that the triodes are matched.   This is important if you are using a pre , dac, headphone amp with a single 6922

I agree with Jond, buy a tube from a reputable source that matches tubes like upscale or jim mcshane or brent jessee.....

I had a Gold Lion in my c-j Classic 2SE which is tough on lesser tubes... that GL is three years old, still quiet.   By luck I came across a few Reflector Rocket logo 6h23 en tubes and that is the only reason I pulled it.   The Glod Lion is the best modern 6922 in many peoples opinion.   I love the tone of the JJ 6922 but I experienced short life, less than 6 months... so it is Gold Lion when I buy a preamp or phone 6922.   I use standard EH 6922 in my amps phase splitter and they last forever in that position.  But there are a number of pres that push that tube hard and you need GL or a Pcc88 which has a 7v heater so it can take the punishment a little better.

Thanks,
My worry is the tubes won’t solve the issue, and I will be out more money. From Upcale Audio, there are 3 options; Gold, Platinum and Kevin’s Stash. Which would you go with?
Some in another discussion are saying it could be dirty power that the tubes are sensitive to, but none of my other stuff is. My systems are dead silent (aside from this). I have tried the MK-30 in both my top 2 systems, same prob. Other equipment, PS Audio, Mark Levinson, Moon...etc.

Ting each tube with a pencil tip and see if it's sensitive to the taps. You might get away just replacing that one. 

I think you mean a "VK-30" and not an "MK."

Tubes are graded better when they are lower noise and more closely matched. It sounds like you only need lower noise.

I would call Kevin, Brent Jessee and Jim McShane and explain your problem. I think any of those three will be honest about whether they have tubes that will solve your problem, within your budget.  If they don't, sell the preamp.