Hi Kel. I have not heard the new mullard russian clones however.... I have heard the jj el34, as well the svetlanas el 34's. Compared to the older mullard xf1,xf2 through to xf4 series, the current offererings just don't cut it for me. As inexpensive as they may seem,I personally think your throwing good money at bad.You couldn't give them to me. Once one hears them side by side, it's immediately apparent. There are other good sounding alternatives to the expensive nos mullards xf tubes... the american fat bottle 6ca7 is a very good tube, the 1980's vintage tesla el34 is a superb tube and can be found for well under $200 a quad.
