Thanks again David and Phil!
I will try the tubes with my 007t and 009s and see what happens and rebias somehow if I think I need it.
Thanks George. So would the RCA clear top 6FQ7 , 6CG7 tubes I see at Tube Depot be the same spec as the stock Stax tubes?
(Stax recommended these to me on the phone.)
I collected some information about tube amplifier bias adjustment in a post on the Norwegian forum Hifisentralen: "Biasjustering av rørforsterkere for elektrostathodetelefoner" including links to relevant Head-Fi threads and posts and YouTube videos. Google Translate from Norwegian to English: "Biasjustering of tube amplifiers for electrostatic headphones" (see post #359).
Good stuff. Thanks for all the help.
I like my 009s a lot but I've done a lot to perfect my stable of dynamics I like with my pinnacle amp, so I just get by with my 007t/ii when I am in the mood to
have my 009s tell it like it is (and I hope I can handle the truth when I listen to them).
(Like I said sometime earlier, I think the PSvane tube is the pick of the litter for the Pinnacle.)
If you're aiming to keep the 007/t, I read somewhere that Justin can do an upgrade which is much more significant than any tube swap.
I don't know how much this would cost or, considering his BHSE batch work, how long it would take.
The mod has also been detailed online so you could probably do it yourself as well
This is an incorrect and misleading statement. Stax manufactures extension cables for a reason