Was the OT primaries, just reversed them and tried it with 6V6, 6L6, EL34 and KT66 all perfect. :cheer:
Just tried the KT66 with the Celestion Blue in my 5E3 and my missus came out to tell me it was a bit loud for 10pm.. Sounded really fawesome!
I’ve put the 6K6 back in anyway. Have also ordered the replacement boost caps.
Thanks for all your help!