Keep in mind and please disregard all my comments about kt88=6550
Richard Gray showed me in his Sylvania Tube text book,
a kt88 is NOT equal to a 6550.
Close but no cigar.
They have slightly dif specs. The 6550 has a tad more power handling, spec #'s.
I have Svet 6550's.
I have ohh 400 hrs on them, , Next year when they have 2500+ hrs I plan to try the EH 6550s.
Richard Gray showed me in his Sylvania Tube text book,
a kt88 is NOT equal to a 6550.
Close but no cigar.
They have slightly dif specs. The 6550 has a tad more power handling, spec #'s.
I have Svet 6550's.
I have ohh 400 hrs on them, , Next year when they have 2500+ hrs I plan to try the EH 6550s.