Output tubes for ARC Ref 110


I am getting ready to replace the tubes in my ARC Ref 110.
I will be buying set of KT120 as main output tubes but was wondering if I should also replace at the same time the 6H30 stage tubes ?
I have done just a bit of reading and see that many people run the 6H30 much longer than the main power tubes.

What's the recommendation here ?

thanks!
ether

Showing 1 response by lostbears


 Yes, bias them the same at 65ma. The KT 120s should last much longer than 6550s. I have heard around 4000 in the Ref 110.