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Anybody try these? How does it compare to other kt88, kt120, kt150 or other?
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I've heard of at least one manufacturer and one British reviewer who won't get near any KT120 saying they don't come close to the linearity of a KT88. The KT150 however seems to be a much better solution if you're looking for a high power output tube.
When Mike Sanders upgraded his Silver 88 amps (KT88) to the new Mono 120, the only tubes he recommends are either KT88 or KT150. Note what he skipped over. ;^)
"The piano ain't got no wrong notes." Thelonious Monk
Edits: 08/05/16
Said so in detail on the VAC website (I'm too lazy to see if the blurb is still there).
Looking at the curves, I can see why. Check the link.
It really doesn't come off as a forgiving tube. You'd have to bias somewhere down to -9V and operate with a 4VRMS signal to meet your linearity demands. Fwomp.
On that note, if I understand things right, wouldn't it make a power section work more like a bad half-wave compressor? It reminded me of the 6386 data sheet - it's a tube used in a lot of old compressors like the Fairchild (look at what happens in the data before/after -17V - you see why they used it). But, you'd only get that effect on the signal's rise in the case of using a KT120 for power. On the trough, you'd lose detail and a feeling of power, no? (Forgive the ramblings, still learning)
Anyway, thanks for pointing out the data sheet. Makes me reconsider this tube's overall use. After looking at the KT150 data, I'm not really any more impressed, but at least there's a functional range between -10V to -20V.
I guess it really depends on the amp's driver stage and what it's meant to feed.
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May your tubes be lively, warm, and long-lasting. Holy be thy heater.
I know it's not the same tube but I have a set of their EL34's and they impressed the pants off of me!
So did Gold Lions KT66s.
They are right up there with the best tubes I have ever heard in my Rogue Stereo 90 when they were working.
Unfortunately quality control appears to be an issue, my first quad had a tube that would not bias, and the second replacement quad would not hold steady bias after a few days of use. The Tung Sol KT120 are rock solid in my amp but don't sound nearly as good.
If you do try them, please report back on the sound quality and reliability. I will be trying them again one day if they ever get them working right. The sound is that good.
Mendel, what tubes are you using now? In your amp after the kt120z what was the best sounding tubes? -in order please. Thanks
Hi Kujocku.
My Rogue amp can use many different output tubes. I like KT66/6L6 sound and am currently using the Gold Lion KT66 reissues.
It is hard to say which tubes are the best, but I like the Psvane grey glass KT88, EI KT90, Penta Labs KT88SC, Russian 6P3S-E, vintage GEC KT66, and Treasure KT88 and 6CA7.
Enjoy the roll!
Ku
I've heard great things about the TungSol KT120 and I like the Shuggie Treasures a lot.I've only heard the KT88z and the Penta/Shuggie solid plates,both excellent tubes.I personally have never heard a bad sounding Shuguang tube.They are a very advanced and upscale company and it's pretty white collar if you visit their website.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
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