Please help me with a Cary Audio tube question

You can but it will require surgery and some changes, how good are you with a hot iron.

Cary is a good company, they will probably respond, and probably even offer to do the mod for you, they are slow on e-mail. Give them a couple of weeks if they haven't responded and you might follow up with them again.

jeff

you could wait for a response,
OR just Call????

If you want a KT-90 amp, then why not sell the CAD-40M Signatures and buy the design that you really are after?

You'll probably spend less money, and end up with a better result.

I can understand your desire to move away from those tubby EL34's. They certainly aren't my favorite power tube, either.