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
I still only have about 15-20 hours on the Spirit 2 and set it up with Sylvania's - EC882 & a 5814 - one of each on each side - like the sound ; after awhileI am going to try RFTs that I bought. Also, to the point a couple of you made about the RCAs, Paul at USA Tube Audio emailed me the other night about trying the RCAs with this amp , so I'll plan on giving them a whirl given his and your recommendations
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