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In Reply to: RE: upgrade OPT for TU-8200 posted by Oface on March 04, 2016 at 12:27:31
If you buy your tube from a reliable source, you should be ok.
For the OPT, I am waiting the smaller Lundahl OPT. The price is more or less the same.
I have a friend that is letting me borrow a pair of kt90's and 6550's to compare against the KT88's I bought. He also said he has some kt120's he'll let me borrow.
Can I use the kt120 with the 8200?
no, you cannot use kt120. kt120 requires higher current. you can use el34, 6l6gc, 6550c, kt88, k90
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