the best by far are the Original Tungsol 6550,black plates,
then the other 2 grey plates.for kt-88 the Superb golden lions from Genelex. For modern tubes ,
the new Tungsol tubes can handle a minimum 5 more volts on the plate around 43v ,for under 100 for a quad worth a try.
then the other 2 grey plates.for kt-88 the Superb golden lions from Genelex. For modern tubes ,
the new Tungsol tubes can handle a minimum 5 more volts on the plate around 43v ,for under 100 for a quad worth a try.