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6922 Issues / Recommendations

I have a pair of Quicksilver Mid-Monos. After shutdown one of the amps produce a static noise through the speaker. Last night while shutting down in the dark I noticed some arcing inside the 6922 driver tube. I am assuming that this is the source of my problem.

My output tube are EH-KT88 and are about one year old. Based on past experience these tubes tend to last 2 years. The 6922 are the originals that came with the amp when I bought them new more than 4 years ago, they are Sovtek.

I guess I should swap tubes between amps to be sure to find the culprit. One more note, the amps play fine when on the problem only occurs after shutting off the power.

If my assumption is correct and I need to replace the 6922, what tubes do you recommend. Budget would be up to 100$.
nick_sr

Showing 2 responses by nick_sr

nick_sr OP
263 posts
 
Thanks for the recommendations. In the end I heeded Bojack's, JPerry's and Mechans advice and I spoke with Mike Sanders.

I am really glad I did, he suggested that I change the input tubes as wells as the drivers. The end result was well worth the wait, everything sounds a lot tighter and more focused.
nick_sr OP
263 posts
 
I swapped the tube to the other channel and the noise followed. So I am sure that it is the culprit. Amps will remain off until I find a suitable replacement.

@jednite, my amp uses one 12ax7 as the input tube paired with one 6922 as the driver. I read in an older thread that this configuration has it own sonic signature that means that I will not likely hear the full potential of 6922 but a mix with sound of the 12ax7.

So I a reluctant to spend a lot on NOS tubes if I won't hear the difference.

Has anyone experimented with different 6922 on their Quicksilver Midmonos?
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