2. amps-preamps
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time to discuss kt-88's

It is time to retube. I have quicksilver 90's, and I understand different amps like, or may like, different tubes. I have searched the archives and found little discussion on kt-88 types. I have also wacthed a few post go through without a responce on different amps seeking advice on which tube that use kt-88's.
There are more options for kt-88's lately from svetlana, sovtek, jj and electro-harmonix. I feel that we, as audiogonners, should be discussing them. What are your opinions of these different tubes? What are the differences between them, how do they compare to n.o.s.? Any great bargains or sleepers? ect.
basement

Showing 1 response by ampup

ampup
12 posts
 
One thing I don't see discussed much, except in this posting is the compatabity issue. Bias voltage, and plate voltage seem to be different for this tube, and they don't seem to be a drop in substitution for Kt88s, or 6550, if all paramaters are not met, resulting in plate glowing, short live, etc. Has Any one used them in dynaco mark IIIs, what luck, and what mods were made to accomodate them, from bias, to plate voltage? Check out the Citation page on the web to see comments about bias, and voltage, which makes me post this, as I need to retube, and am unsure of going with the EH Kt88, or the EI Kt90. Then of course there is the Kt 100 which we don't seem to hear much about.

Any suggestions?
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