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
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Fernando,the friend of mine using the Premier 8 is a former reviewer for TAS.I had the retubing discussion with him,and,he continues to use the tubes supplied by CJ themselves.He had spoken with Lew Johnson who feels the stock tubes are fine.This is not to say that tube rolling won't be better,but it could save you some money,as well as the possibility that you may actually get best performance from CJ's own stock.
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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Thanks to all for your feedback.

I have a quotation from CJ at about $650 per amp for a full retube set, those are GE if I am correct.

I also have a friend who can get Svets 6550c, which some say have the best sonic behaviour in terms of tonality and dynamics, this route will cost mearound $500 for both amps.

I currently have Sovteks 6550, sounding great to my ears but at the end of their operational life.

Fernando
Thye prem 8a's sound just fine with the Svetlana 6550's. Lew Johnson strongly recommends them.
I have also used EV KT88's and they sound slightly different. They are a little leaner in the bass so give the impression of slightly more extension.
I would listen to the amps as is , then make a decision on how it integrates into your system.
Downunder -I´ve done that and really liked the sound of the Premier8, I was just wondering tube recommendations for the neccesary re-tubing this unit needs shortly.

Since the Avalons does not go that low, I think I will lean towards a more robust sounding tube, looks like the 6550 is such a ticket.

Fernando