The jj kt77 really sounds great to me
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Yes, winged c's. As for the jolida 100a, my NOS favorites in order are:
Sylvania 5751 gold brand, gold pin: fantastic mids, balanced highs and lows.
GE triple mica black plates 5751.
But a great tube at a very reasonable price is the new
EI Elite Gold 12ax7. Excellent. As you know, tubes are system dependent. For a good run-down on 12ax7/5751s, google Joe's Tube Lore.