Bwhite, my 350 B's are WE's but I suspect the NU's are exactly the same tube. You might want to ask in the Tube Asylum. I am sure someone there can give you a definitive answer.
Grannyring, I know that Bryan isn't as big of a fan as I am of the 6L6 metal tube, but I liked them even better than the GEC KT 66's. And they are about $35 a tube. If I wasn't running WE 350 B's I would use the 6L6 metals.
I know the isolation issue was debated here earlier, but in my system I found a solution that worked wonders. I ordered the DH Labs large cones and put them under my Supratek on top of a piece of 12 x 12 slate - not tile, but a cheap slate from India that I found at Lowes. When you tap this slate there is no ring, just a dead thud. I thought what the heck, I'll try it. Under the slate is another layer of material I also found at Lowes. It is an inter-locking mat that is sold for garage floors, weight rooms, etc. I cut a 12 x 12 piece of this material, which has a 1/16 inch thick hard plastic outer shell laminated to a tough 1/2 inch resilient foam. Under this foam I put a 12 x 12 piece of Sorbothane with another piece of the foam under the Sorbothane and another piece of slate under that with one more piece of foam under the slate resting on the MDF shelf.
The resolution and soundstage is amazing when the Supratek is resting on this sandwich. A deaf person could here the difference. As clear as I thought my system was before, it is laughable how big the difference is since employing this combination. And the most expensive part is the sheet of Sorbothane.
I now have all of my components on this same sandwich and I am thrilled with the results. Only my transport is not sitting on this combo, resting instead on a Neuance shelf which is even more amazing.
Since I plan on over-hauling my entire system in about 9 months, I haven't ordered more Neuance shelves, but I highly recommend them. My home-made shelf seems to be very close to the Neuance shelf, but I suspect it adds some color to the sound that the Neuance shelf doesn't. But I can happily live with whatever color my home-made solution may be adding.
I did not find cones and an isolation sandwich for the power supply section as beneficial as the linestage, but the PS does sit on one of my DIY isolation sandwichs. If you don't have your Supratek isolated yet, you may want to try it. It made this giant killer even better for me. YMMV
When I upgrade my System, I suspect I will seriously consider the Grange or Cabernet, but after reading about the H-Cat, I would love to hear one. If it as good or better than the Suprateks, I would probably go with the H-Cat to avoid the hassle of tubes, but I am skeptical that the H-Cat will better the Grange. Just a guess, but as good as my Chardonnay is with NOS tubes, I can only imagine how good the Grange must be.
