Tubes Asylum

I don't mourn the loss of KT 120s and KT 150s

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garymuffley

In Reply to: RE: Why do they have to be Russian? Why not JJ? nt posted by Sondek on May 13, 2023 at 09:03:18

I can understand a manufacturer using KT 120s or 150s because of higher dissapation and plate voltage ratings, but in terms of linearity (plate curves), they are not as good as a KT 88, 6550 or EL 34. Ruggedness, yes. Sonic quality, no.

Follow Ups:

RE: I don't mourn the loss of KT 120s and KT 150s - Mendel 08:03:04 05/16/23 (0)
I've posted many times that the Russian Tung Sol KT120s are a crappy sounding tube in my Rogue amp even though that is the stock tube Rogue is using these days.
I agree manufacturers were using them because they are reliable and provide slightly higher power ratings. Definitely not because of sonics.
RE: I don't mourn the loss of KT 120s and KT 150s - Mendel 13:53:59 05/15/23 (0)
I've posted many times that the Russian Tung Sol KT120s are a crappy sounding tube in my Rogue amp even though that is the stock tube Rogue is using these days.
I agree manufacturers were using them because they are reliable and provide slightly higher power ratings. Definitely not because of sonics.
RE: I don't mourn the loss of KT 120s and KT 150s - hahax@verizon.net 19:54:04 05/13/23 (2)
I've been told that too by a manufacturer who uses them probably because most tube people have been led to believe they are better especially due to higher power output. But in the best amps linearity comes first. And that's where a good push/pull triode amp shines.
- RE: I don't mourn the loss of KT 120s and KT 150s - Sondek 06:36:28 05/14/23 (1)
  Ken Stevens of CAT is awfully partial to the 120 running in triode. He has no love at all for the 150 in any mode however.
  Fortunately for me, I don't have a dog in this tube fight. My Acoustat amps use 6GE5, a lowly TV sweep tube. I have a lifetime supply socked away.
  
  Edits: 05/14/23
  - RE: I don't mourn the loss of KT 120s and KT 150s - f1jim@yahoo.com 15:38:33 05/16/23 (0)
    Funny, I have two power amps that really shine with KT-150's. I mean really move up a few notches using them. I am sure there are technical reason for that but I have socked in a stash of KT-150's for that reason.
    f1jim
    
    Edits: 05/16/23

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