(!!!) (Recommended Pair) 6V6GTA Sylvania NOS 1970 era same build (40ma and 41ma)
(!!) (Best Pair) 6J5GT RCA NOS 1959-1960 (9.2ma and 9.0ma)
(!!) (Best Value Pair) JAN-5Y3WGTA Philips by Sylvania NOS 1985 (50-52/40 and 50-54/40)
(!) (slightly microphonic single) CV4004=12AX7 Mullard NOS 1981 (1.3/2.1ma)
412A Western Electric NOS 1981 (54/40 and 54/40)
6189W GE JAN NOS 1981 (8.4/9.0ma)
6J5GT Raytheon NOS 1940's small hairline crack in base (6.4ma)
6J5WGT Raytheon black ribbed plate NOS 1959 (11.4ma)
JAN-6080WC Sylvania used/good 1981 (81ma/98ma)
