Author Topic: Tube Comparison  (Read 1772 times)

Offline steve

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Tube Comparison
« on: May 03, 2019, 10:16:01 AM »
I have a quad of JJ KT88s from approximately year 2000. The pins are smaller but supposively new tubes are ok
pin wise.

What I am wondering is has the "sound" changed from between 2000 to now? In otherwards,
if I were to purchase new JJ KT88s, would the sound be different from the old JJs?

Second question, has any one compared the typical $37.00 chinese tubes to the JJ KT88s? What is the sonic difference?

Thanks for any insights.

steve
Steve Sammet (Owner, Designer, Electron Eng, SAS Audio Labs, Ret)
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Offline rollo

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Re: Tube Comparison
« Reply #1 on: May 15, 2019, 10:39:23 AM »
  Steve unless a different run or batch the answer is no. JJ's IMHO are quite good overall vs NOS. I found that any inexpensive Chinese tubes are unreliable as well as sonic disasters.


charles
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Offline steve

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Re: Tube Comparison
« Reply #2 on: May 16, 2019, 03:37:43 PM »
  Steve unless a different run or batch the answer is no. JJ's IMHO are quite good overall vs NOS. I found that any inexpensive Chinese tubes are unreliable as well as sonic disasters.


charles

Thanks for the information and heads up Charles. I also like the JJs in my system.

I have been comparing the old JJ KT88s and JJ E88cc input tube, and then flip two switches (in power supply) and then using Winged C KT88s and Bugleboy input tube. Did not know if the new JJs might mess up my adjustments.

I have it where I don't know if I can tell the difference, except maybe in width of sound stage, and crispness. Got to use more selections just to make sure.

Cheers

steve
Steve Sammet (Owner, Designer, Electron Eng, SAS Audio Labs, Ret)
SAS "V" 39pf/m 6N copper ICs,
SAS Test Phono Stage
Accutex 320 iii STR Mov Iron Cart
SAS 11A Ref Tube Preamp
SAS 25 W Reference Triode/UL Monoblocks
2 way Floor standing Test Speaker