I had my CJ Premier 8A (operating in triode) upgraded to full teflon (V-Caps) performed by rhBSoundDezign in Churchville, Pa. The amps had already had extensive power supply upgrades and the rhBSoundDezign JB Gold mods and the internal wiring upgraded to gold/silver wire. I am using Svetlana Winged C 6550 output tubes which are my tube of choice even over the original GE 6550 NOS tubes that I have.
The V-Cap upgrade made a significant difference particularly in smoothness and detail. A caution though. It takes a long time for the teflon caps to break in. I don't think that you hear the full improvement until at least 300 hours minimum.
The V-Cap upgrade made a significant difference particularly in smoothness and detail. A caution though. It takes a long time for the teflon caps to break in. I don't think that you hear the full improvement until at least 300 hours minimum.