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Re-biasing a CJ Premier 8

I am considering to get a used CJ Premier 8 amp, current tubes are 75%-50% of their life (12 6550 per side) and dealer recommends me to re-tube both units.

1.- Which are the best options considering a high price/performance ratio?

2.- Any word on domestic Svetlanas vs fying "c" options?

3.- What about trying KT90´s?

Thanks for your feedback.

Fernando
flg2001

Showing 3 responses by jeffreybehr

jeffreybehr's avatar
jeffreybehr
805 posts
 
I used Ei KT90s in my Elevens very succesfully. They seem to be loved by many.

Enjoy your Eights; they're fabulous amps

BTW, I think you meant 'retubing'.
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jeffreybehr's avatar
jeffreybehr
805 posts
 
I'd be surprised if c-j is selling their presumed-selected-and-burned-in 6550s for less than the $70 per pair you can buy Ei KT90s for.
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jeffreybehr's avatar
jeffreybehr
805 posts
 
If you're about to spend a perhaps over a thousand dollars on tubes, spend a few bucks on the recent issue of 'Vacuum Tube Valley' that has MUCH info on new and old 6550s/KT88s/KT90s.

A 2-amp set of Ei KT90s from The Tube Depot would be $560.
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