Thanks for the tips!
I just ordered 4 Electro-Harmonix 6922 Gold Tip tubes from Upscale. I did go for the Platinum grade, non-cryo versions. I was considering the Gold Lions, but figured I could always go that route if I wanted a more lush, warm sound than what the EH tubes will give. As this will be the first time replacing the tubes for me, I wanted something “close” to the stock sound I’ve grown to love…which, from what I’ve researched, the EH are, but with a touch more warmth and presence in the mid-range. I also did check the tube connections and contacts; all seemed good, but the problem remained. So, I’m hoping the replacement tubes are all I need…
Will let you guys know how it goes when I get them installed. Thanks again!
Arvin