CJ-premier 11-A with KT-88's

[repman]

I have been running some Gold Lion KT-88's in place of 6550's in my CJ premier 11-A power amp.

They are biased properly and sound great, however I noticed the transformer seems to get much hotter than it ever did with the 6550's.

Do any of you have any experience with this combo ? are they drawing to much current for the transformer and therefore getting the amp to hot?

I do not want to damage the amp or is the increase in temp normal using a KT-88 and not to worry?

I appreciate any help you can lend on this , thanks