Guys & girls... anybody has any idea how much heater current (mA) will Aune T1 be able to feed? PCC88/PCC189/ECC189 and even PCC85 seem to work despite higher heater voltage required (not in case of Aune tube buffer) but can it handle tubes with little higher heater current like ECC85 (~435mA, 6.3V) ? Is it depending on components inside T1 or power brick able to feed higher currents?
It will handle some higher current tubes, others don't seem to work well. It's been hit or miss. Some ECC85 and PCC85 will work, others won't. I've got several different types of PCC85 (9AQ8) here and only a few of them work well, including early 70s herleen manufactured Amperex, RTC, Philips and Mullard. The Tungsram, Zaerix (no easily identifiable mfg), and a few others did not. I've got some very early production Telefunken (Germany) and Mullard (Blackburn) 9AQ8s that I have not yet tried.
I haven't been able to track down any specs that list the maximum mA it can handle. Since all three sections are powered from the same 15-0-15 VAC input, I've thought about pulling the amp board to see if it frees up more input power for the tube heater circuit.