2. amps-preamps
  3. 195772-110571

Anyone know what the approx. B+ voltages are on CJ Premier 8 mono amps?

I am considering a pair of these amps, but I have no idea just how hard CJ ran the 6550 output tube voltage.  The old GE 6550 tubes from that era were very tough and could be run at higher B+ voltages than many newer Chinese tubes can.  If the B+ is too much more than what a more conservative build night be (less than 500V), I think I will pass as 16 output tubes is not a small price for retubing.

mckinneymike
ghdprentice
8,296 posts
 

I'd ask an AI and call Conrad Johnson.

mckinneymike OP
99 posts
 

Thanks for the reply sir.

  Calling Jeff at CJ is the best option, but I am sure he gets beat to death with calls.  Just wondering if anyone here might know before I called CJ.

johnss
628 posts
 

I used to have the prem 8s, don't recall the plate voltage but was not low. I would pass on any chinese 6550s or KT88s unless you are into fireworks. Would stick with either the Russian KT88s, GE 6550s or the KT90s. 

awise1961's avatar
awise1961
147 posts
 

I second calling Jeff at CJ.

Otherwise, post your question on the conradjohnsonowners forum.

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