(!!!!) (Recommended Single) JAN-7308 Raytheon NOS 1968 (12.5/16.8ma)
(!!!!) (Recommended XF4 Pair) EL34 Mullard XF4 branded GE NOS and Philips used/like new 1975-1977 (99ma and 106ma)
(!!!!) (Slightly microphonic Single) CV4004=12AX7 Mullard box plates NOS 1981 (Gm=1400/1500) (0.8/1.1ma)
(!!!) (Best 12AT7WC Single) JAN-12AT7WC Sylvania black plates NOS 1978 (9/10ma)
(!!!) (Best Overall Pair) EL84 Mullard UK NOS 1971-1973 (45.6mA and 47.5mA)
(!!!) (Best Single) 5751 Sylvania NOS 1970's (2.4/2.4ma) 1% section balance
(!!!) EL34 Mullard branded Philips NOS XF4 1979 (101.5ma)
(!!) (Recommended Pair) 6AW8A GE NOS 1976 (3.1/3.3ma and 22/23ma) (Shindo)
(!!) 5842 Raytheon branded RCA NOS 1976 (20ma and Gm=20,000)
(!!) EF80=6BX6 RTC by EI Yugoslavia NOS 1976 (14ma)
CV1377=GZ34 Mullard Blackburn UK NOS 1976 (read review)