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  #4851  
Old 08-20-2018, 05:28 PM
decooney decooney is online now
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How many hours do you have on the Tung Sol KT150s so far?

When I first got my Hot Rod Inspire KT150s the sound was a tad bright, less musical, but smoothed out some more past few weeks.

Figured out was not my preamp either. I run mid 1950s Sylvania 6SN7 Black Plates in my Cary SLP98 preamp and it’s glorious sounding with my V12R amp which runs all 50s Sylvania front end tubes as well.

So, I gave the Inspire 150 more play time and more break in on the tubes and caps) as many here advised) and I’m pleased with it now. I kinda like the odd alien shape of the tubes too. Hahah. For new generation tubes, could not be happier. No desire to change tubes on the Inspire KT150 setup.
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  #4852  
Old 08-20-2018, 05:49 PM
Bombadil Bombadil is online now
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I do need more hours on the KT150s to be fair. Only have about 25 hours on them. In the past I have not noticed any change past that on any tube, but it is possible.

So far, except for their looks, I am liking the KT150s. Right there with the KT88s on top of my list.
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  #4853  
Old 08-21-2018, 11:05 AM
decooney decooney is online now
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Default research on burn-in and shape...

Quote:
Originally Posted by Bombadil View Post
I do need more hours on the KT150s to be fair. Only have about 25 hours on them. In the past I have not noticed any change past that on any tube, but it is possible. So far, except for their looks, I am liking the KT150s. Right there with the KT88s on top of my list.

re: KT150, found this for reference:

BURN-IN:
  • 72 hours pre-sale burn in time from some of the more reputable US tube dealers. Some won't sell them unless they have at least 72hrs of test & burn on them.


EGG SHAPE:
  • Quote:"The Tung-Sol KT150 glass envelope is a special egg shaped balloon that was developed to improve thermal dissipation and maintain a superior vacuum for the best sound. The fact that the glass envelope has no flat sides means the Tung-Sol KT150 has no problems with microphonics."



.
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  #4854  
Old 08-21-2018, 12:25 PM
Bombadil Bombadil is online now
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Mine were supposedly burned in for 24 hours and then matched. How does one know?
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  #4855  
Old 08-21-2018, 08:47 PM
decooney decooney is online now
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Quote:
Originally Posted by Bombadil View Post
Mine were supposedly burned in for 24 hours and then matched. How does one know?
Compare after time.

As others advised me, my Inspire amp sounds quite a bit different now after a few weeks of listening compared to when I first got it with new tubes. How much is tubes vs. other parts melting in, I'll never know until I try other tubes. Happy with the KT150s now after some good run-in time. That's all I know.
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