I have been using KT150's as power tubes, bought from a UK seller, in my Elise for the last month and they sound gorgeous, better than any other power tube I've heard in Elise except perhaps for the the KT120, but those have a different sound signature. Both are better to my ears in Elise than the much vaunted KT88, using HD800.
I would never buy from Kevin/Upscale Audio again. I bought a pair of "matched" EH 6CA7 to find a 20% plate dissipation difference. Unacceptable for a PP application. Swapped them out for an eBay pair, no more hum.
I love you man you're the most honest seller I have ever met in my life you're knowledge about tubes and audio electronics is so good I'm telling you that as a guy who was 👨🎓 electronics an as a guy who is musician and who built his own guitar amplifier. All the best from Poland
When you say " "no other tube seller is doing this attention to detail", I ask the question, "Have you visited and contacted every other tube seller in world to check?" because if you haven't you are spouting BS. In the UK The Advertising standards Committee would be knocking on your door to call you out on claims like that. Its a nice ploy to justify your prices though, but most will see through it. This is fairly standard practice to make such wildly absurd claims, you wouldn't last 5 mins in the UK.
Interesting Comments There are UK HIFI sellers in the UK making stupid statements with regard to Naim power cords with their fancy 13 amp plugs and I E C connector on the other end of the cable and asking in one case £600 You can go on line and bye the same thing with out branded Naim on it for £5. one ebay seller is asking £80 for a 13 amp plug because it has Naim stamped on it and you can go into Pound Stretcher and bye a 13 amp plug for £2 .
Hi Kevin. I am in Ghana West Africa. Been watching you on RU-vid and you got me interested in the Prima Luna integrated amps. Been using a Caver amp with a Klipsh LaScala with a Velodyne sub woofers. Have to say you got me interested but l have to make a decision.
I always wipe the glass after touching tubes to remove any grease but it is not necessary, the reason it is important with car headlight bulbs is because they get so hot with thin glass and the oil from your hands could create a spot hot enough to make bubbles in the glass and eventually break. Vacuum tubes have thicker glass and run much cooler so no worries.
If it "works", the Russians will ship it. And "works" is a rather loose definition of what they'll ship. I recently got a new 12AX7, Mullard reissue, which has so much measured gain it's crazy. On my tube tester, a value of 20 is typical. 40 is as high a transconductance value as I normally find. This one...62 on one side. It's got so much gain that I can make you think your amp has several problems just by putting in your amp. The amp will simply misbehave. I want a KT150 just for display purposes. Not to run it.
Most tubes guys said over and over again about not touching tubes with bare hands but Kevin, you and the working guys behind you both didn’t ware any gloves.🤦🏻♂️
I just received 8 matched KT150 tubes from Uncle Kevin for my ARC Ref 110 this week. I've tried Winged C 6550's, KT120s, and find the KT150's sound bigger and more authoritative. Kevin is 100% correct about buying tubes elsewhere. I bought my first set of "matched" KT150's from another seller. After a couple hundred hours of use, I couldn't can't get the tubes to bias correctly any longer as the values have drifted. Those tubes would be OK in a different amp that has individual tube bias settings, but not my Ref 110. ARC guys shouldn't shop anywhere else except Upscale Audio.
I have a Yaqin MC-100b integrated tube amplifier with KT88 tubes. Can i get KT120 tubes to replace them and if so should i? would i get more power? Is this advisable? and lastly, how much would 4 KT120 tubes cost me from you?
He is saying do not trust the manufacturer and trust me and for that I will sell you the tube for higher the price. Buy cheap tubes and brand them upscal and sell them.