(!!!!!) (Best Pair) 5670W GE JAN NOS 1986 (9.2/9.0ma and 9.8/8.8ma)
(!!!!!) (Best Single) PCC88=7DJ8 Siemens Germany branded Pope NOS 1979 (14.2/14.5ma)
(!!!!) (Best Overall Pair) JAN-6528A Raytheon NOS 1978 (132/138ma and 143/144ma)
(!!!!) (BEST PAIR #3) JAN-5755 Raytheon Black Plates NOS 1979 (1.7/1.7ma and 1.8/1.8ma)
(!!!!) (Best Pair) 6189W Sylvania NOS 1976-1979 (9.5/9.6ma and 9.2/10.2ma) 1-3% matched
(!!!!) (Best Single) 420A Western Electric NOS 1977 (2.2/2.3ma) 1-2% section balance
(!!!!) (Best Value Pair) 6L6WGB=5881 Sylvania NOS and like new same build 1970's (74ma and 75ma)
(!!!!) (BEST XF4 Pair) EL34 Philips Mullard NOS XF4 1979 (91ma and 94ma)
(!!!!) (Good Value Pair) 6L6WGB=5881 Sylvania and Philips JAN black base 1979-1986 (72ma and 73.4ma)
(!!!!) (Recommended Pair) 6L6WGB=5881 Sylvania NOS same build 1980 era (81ma and 84ma) (same Gm)
(!!!!) (Recommended Pair) JAN-12AT7WC Sylvania black plates NOS 1978 (8.7/10.8ma and 8.4/10.6ma)
(!!!!) (Recommended Pair) JAN-12AT7WC Sylvania black plates NOS 1978-1979 (8.6/12.4ma and 9.0/11.8ma)
(!!!!) (Recommended XF4 Pair) EL34 Mullard XF4 branded GE NOS and Philips used/like new 1975-1977 (99ma and 106ma)
(!!!) (Best Single) KT77 Gold Lion brown base NOS with faded Gold Lion logo (7848=1978) (95ma) (Gm=12,800)
(!!!) (BEST VALUE SINGLE) 6922=E88CC Tungsram Hungary NOS 1979 (12.2/12.8ma)
(!!!) (BEST VALUE SINGLE) 6922=E88CC Tungsram Hungary NOS 1979 (12.7/15.6ma)
(!!!) (Best Value Single) 6DJ8 Valvo Germany made in India (Philips Plant) NOS 1973 (18.5/15.6ma) (same internals as Mullard)
(!!!) (Recommended Pair) JAN-6189W Sylvania NOS 1977-1978 (8.7/9.1ma and 8.6/8.8ma) 1-2% matched
(!!!) (Single) 6080 GE NOS 1977 (95/115ma)
(!!!) EL34 Mullard branded Philips NOS XF4 1979 (101.5ma)