KT77 tubes in a MC275 amp

I have a MC275 and blew a KT88 tube - I also have a MC240 and a bunch of spare KT77 tubes.

Can I use KT77 tubes in my MC275?

dseeker06-10-2023 12:02am

dseeker OP Details Discussions Posts This discussion Message User 2 posts 06-10-2023 at 05:08am Copy Comment URL Report Comment Edit Delete Sarcasm is the refuge of the weak. My question is serious. Will it damage the tubes, or the amp?
Post removed Jun 10, 2023
jjss49 Details Discussions Posts This discussion Message User 6,612 posts 06-10-2023 at 06:19am Copy Comment URL Report Comment Edit Delete Can I use KT77 tubes in my MC275? no you cannot... the kt77 will not run correctly and will be destroyed if run in place of the kt88/6550 output tubes, for which the amp was designed... the amp may also be damaged
Post removed Jun 10, 2023
dseeker OP Details Discussions Posts This discussion Message User 2 posts 06-10-2023 at 02:32pm Copy Comment URL Report Comment Edit Delete I spent about an hour reading both of the owner's manuals, and then ran a few searches and couldn't find the answer so I decided to ask here cuz everybody seems very knowledgeable. I appreciate the answers. I guess I just have to wait for the delivery of new kt88 tubes. Thanks everyone!