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Retubing an ARC VT100 mkll

Thinking of tube rolling my VT100 mkll. Currently using EH for both the 6922 input and 6550 output tubes. Less than 800 hours on the entire set, so its not that I need an entire retube, just looking to improve the sound if possible. What would give the biggest improvement, changing out the input or output tubes to KT88/90? Bear in mind I would need a closely matched OCTECT of either so bizarre/rare vintage tubes are out of the question. Thinking of Gold Lions or similar, any thoughts from the scholars?
spinaker01
hifigeek1
770 posts
 
I believe there have been a few issues with the 6550EH's and ARC gear. They are currently using the Sovtek 6550WE. I would continue to use the 6922EH as that is the tube that product was voiced with.
spinaker01 OP
491 posts
 
Thanks to all. Guess the 6922EH's stay, and an octect of GL KT-88's are on the upgrade menu.
bifwynne
2,206 posts
 
Hifigeek (Gary), will the VT 100 MkII take the KT120. I found the KT120 to be substantially superior to the 6550.
hifigeek1
770 posts
 
Bifwynne, I have to find my thread or the list of ARC products that can use it. I think there is an issue with space in the VT100 series. The KT-120 is too tall I believe.....
spinaker01 OP
491 posts
 
From what I can see, there should be oodles of room to physical fit KT-120's. Not sure if the bias range or power supply can support this tube though. Anyone know for sure as I have also heard good things about this tube, but have not investigated it as I did not think it was compatible. Anyone know for sure?
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