BTW, I just swapped in two new quads of the PS KT88 a couple weeks ago. The old quads were trouble-free for around 2,500 hours, then developed a bit of a hum in a couple of tubes. No bias issues, just a hum. The other six still sounded good and biased fine but I went ahead and replaced them all, anyway. IMO, that’s a solid KT88.
Alternatives to Psvane KT-88's ?
For the third retubing of my VAC Phil 300.1, I returned to the once reliable Psvane power (CV-181) and output (KT-88) tubes. Sadly, it seems that something has changed in their production specs. My guess is that their KT-88's now operate with higher plate voltage, making biasing a real challenge. Has anyone out here experienced similar difficulties ? What I'm listening to now is more mid-fi than the magic that had me hooked me for years. Can you suggest alternatives that can continue bring out the best of my Shindo pre-amp, Wilson Sophia 3's, and Purist cables ? I thank you for your input; the virtual beauty that used to enliven the space between, behind, above and outside my speakers is gone, leaving me with a similar vacancy.
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