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Tung-Sol kt170 tube started glowing brighter

I installed 8 Tong-Sol kt170 tubes in my Sonic Frontier Power 2 amp. One tube started glowing a bright orange, yellow at the lower portion. I hear no sound interference. Should I replace it? If so, replace paired, right channel quad or all eight for matching purposes? I did swap the tube into different socket and it is the tube.

kitegod
jacobsdad2000
433 posts
 

I would just buy one tube and pray for the best, keep the bright one as a backup. If purchased new you should have a 30day warranty I am sure you are past that. 

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ibmjunkman's avatar
ibmjunkman
260 posts
 

Thermal runaway. Runaway yourself!

dekay's avatar
dekay
5,848 posts
 

Don't reuse the tube that glowed red (not worth the risk).

Pretty certain the P2 has individual bias adjustment for each power tube and if this is the case pick up a new replacement and bias it per SF's instructions.

 

DeKay

kitegod's avatar
kitegod OP
36 posts
 

That's what I wanted to be assured of.   Thanks

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