Thanks Bifwynne for the update. I'm heeding your advice before ordering the KT-120 tubes. I'm checking with Jolida to see if the stock JD-502P can handle the Tung Sol KT-120 to be sure.
They work great in my new Jolida JD502P...I talked to everybody except the janitor (unless I DID talk to the janitor) at Jolida before risking transformer meltdown and was assured it was fine...they do run hotter than 6550s, but sound more refined with seemingly more dynamic range and treble accuracy than the 6550s...not as much physical "tube glow" since the grids are less exposed, but that's OK. I now have the original 6550's, KT120s, and a set of new Svetlana KT88s (just got those) for the damn thing so off I roll!
Damn Wolf that is a lot of tubes for the Jolida. I'm curious to know your findings on the Svetlana KT88 tubes with the 502P. When I went to one tube e-tailer inquiring about the Tung Sol KT-120 he said he won't be carrying the KT-120 but recommended the Penta KT-88SC for the Jolida. At $208 for the quad I'll keep them in mind but right now I'm focusing in on the KT-120.
My KT120s weren't that expensive, and they're back in the amp as of today. After comparing them to the other tubes I think I'm gonna hang with these for a while.
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