I agree with the results of that comparison the Gold Lion KT-77 is a flat out great sounding tube and good value I've been getting matched burned in quads from Tonal Tubes for $170 and free shipping. Beat the pants off the JJ 6ca7 and Winged C EL34s and PSvane Phillips EL34 replicas in my system my amp is a Deja Vu stereo pushpull wired in triode class A.
Ruby el34s sound flat?
I just put a new quad of Ruby EL34s in my Quicksilver Mid Monos. The highs are limited, the sound stage is smaller and it just sounds veiled. Is this just a bad choice for this amp or do they just need to "break in"? Previously I had Teslas. I am using Gallo 3.1's