Thanks guys, I also have a Rogue Cronus Magnum , it came with Sylvania & I have Siemens in it now - different presentations but I like it with either. Will experiement per normal.
RFT is not an expensive tube, but I like them. Priced so that you can give them a try and judge for yourself. Also lived with Electroharmonix, Telefunk, Sylvania, JAN, etc. Not interested in the ultra $$, but I agree with Rodman99999 that you don't want to go cheap.
My friend who purchased my Spirit when I upgraded to the Triton amp, well both of us just replaced the 12AU7 tubes on the Triton Amp and the on the Spirit with the RCA NOS tubes - an incredible 100% improvement over the TAD German 12AU7 tubes, which are the stock tubes. Much more precise and to put it into simple terms, a live soundstage. NOS is the only way to go, for sure, they are truly excellent.
I would second the RCA recommedation, both Blackgate or Clear Tops. The Clear Tops as pretty avaaible and not too expensive yet. Try Brent Jesse or Vintage Tube Services for these and other options.
I tried Amperex, RCS, Siemmens and Telefunken for my Jadis DA50S - I ended up liking the Telefunkens NOS for speed and resolution with the KT88 output valves. - Fernando
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