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Has anyone had problems running kt-120s tubes in there power amp?

Hi everyone I have bought a set of kt-120's for my cary audio CAD 120s power amp and checked with the manufacture. But some audio research people have told me of problems after running them in there older amps, like the vs115. After they where told they can run them in there amp. So I put my stock kt-88s back in. Has anyone had issues with these kt-120 tubes? especially in the Cad-120s?


128x128jakecanada
brf
1,715 posts
 
AR doesn't recommend kt120 tubes for use in their Kt88/6550 amps and you wonder why people who ignore AR are having problems. Cary says it's okay to use KT120 and I have not read any reported Cary problems. I don't see your delemia 
jakecanada's avatar
jakecanada OP
80 posts
 
My friends with audio research amps said it was lamicods on the transformers and breaking them down which ended up having to replace the whole transformers of there amps. Because of the demand on the kt-120 tubes was to hard on the transformers. Also my Cary Cad 120s is my biggest and most beloved audio purchase and i runs hot enough as is. I got it when the Canadian dollar was at par with the US dollar and never had an issue with it. And i plan on keeping it for over 30years. So I want to take the best care of it so i never afford to replace it now. Thats all
facten
2,882 posts
 
Two different amps and apparently your manufacturer told you you can use them. Did you try them or simply put them aside because they don't work in AR amps?
stereo5's avatar
stereo5
6,449 posts
 

Since you aren't running an ARC amp, I really don't see what your concern is.   Obviously the transformers in those particular ARC amps couldn't handle the KT-120 tubes.  Cary already told you the tubes will work fine in your amp, so what is the problem?  The KT-120 tube is like a KT88 on steroids.  Everything is better about them.  You are really missing out by not using them.

FYI, the newer ARC amps work fine with the KT-120 tubes now.

rluthy57
35 posts
 
Hello again, I just answered you on the Marantz SA-11S3. I've been using the KT-120 tubes (12) in my older Rogue Zuess amp with great results. Tremendous increase in blissful easy power. Night and day difference to the KT-88 tubes.
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