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In Reply to: RE: Shuguang Treasure KT88-Z vs PSVane KT88T with Cary posted by Mechans on January 02, 2017 at 05:27:22
I don't have white label Amperex, but I have orange label 6922s and green label JAN Amperex 7308s. When I replaced the latter tubes with Siemens/RCA 7308s, the midrange is no longer "recessed" because the Siemens/RCA tubes are brighter.
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Seems to be a constant problem with these expensive Chinese output tubes (Treasures, PisVanes). They sound great when they are working but just don't seem to be reliable over a reasonable period of time. I have never had trouble in the Rogue until I started spending stupid money on these fancy Chino output tubes. I'm done with them and do not recommend them to anyone. For that kind of money go vintage (GE 6550, EI KT90, SED 6550, GEC KT66, etc)
The good news? I replaced them with a quad of the Penta Labs KT88SC that I have had for years but couldn't seem to make it back into my amp because of these new fancy tubes. They sound great (different than the PisVanes but in the same league) and have always held perfect steady bias. They must have over a thousand hours by now.
The Gold Lion KT66 also sound great and have been rock solid in the Rogue. I believe you can use KT66 in your Cary?
Good luck in your search, and enjoy the roll!
Perhaps Rouge and those tubes just don't get along? I and many others have had no issues with them.
Hi SETdude.
Well the Rogue dose run over 500 volts on the plates I believe, more than some amps. But I have used many different kinds of output tubes on the amp with no problem, including the cheaper PentaLabs tubes also sourced from China.
I think for what they charge the Treasures and PisVanes should work in all amps.
Guys,
In the market for KT88 tubes and was wondering if the Penta SC are still the most reliable at their price point? Lots of choices to include GL, Valve Art and RAM is what most like and I'm not sure I want to spend $500 for Sophia, TJ Full Music or Canada Fuller...
Here's the customized KT88 Amp that's being built for me:
http://www.dsachsconsulting.com/custom%20kt88%20tube%20amp.html
Wig
I am not sure whether I can use the KT66s in my Cary. I tried them once, though, but it was obvious that they just were not 100% compatible - there was nothing except midrange...
yeah, Mendel,the Pentas rock the Rogue! thatīs true. do you have any experience with the "normal" Hifi series Pentas? a buddy told me they sound just the same as the SC series but i can not believe.
"Science just illustrates the current state of errors"
Edits: 01/02/17
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