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(!!!!!) (READ REVIEW) 6J5GT Raytheon black ribbed plate NOS 1950 era (9.2ma and 9.2ma) 1-2% matched
(!!!!!) (Recommended Single) M8137=CV4004=12AX7 Mullard branded Philips box plates NOS 1966 (Gm=1500/1400 and 1.0/0.8mA)
(!!!!!) (Set of 4) 6J5GT Raytheon black ribbed plate NOS 1950 era (set of 4 tubes between 7-10ma)
(!!!!) (Best Overall Single) CV4004=12AX7 Mullard box plates NOS 1971-1972 (Gm=1600/1700) (1.3/1.5ma)
(!!!!) (Best Pair #1) 6J5GT Raytheon metal base black ribbed plate NOS 1940's (8.5ma and 8.7ma) (1-3% matched)
(!!!!) (Best Pair #3) 6J5GT Raytheon black ribbed plate NOS 1940's tilted bottom mica (8.6ma and 8.2ma) (best value)
(!!!!) (Best Pair) CV4004=12AX7 Mullard box plates NOS 1981 (0.9/1.2ma and 0.9/1.1ma)
(!!!!) (Best Value Pair) 6J5GT Raytheon metal base black ribbed plate NOS 1940's (9.6ma and 9.8ma) (1-3% matched)
(!!!!) (Slightly microphonic Single) CV4004=12AX7 Mullard box plates NOS 1981 (Gm=1400/1500) (0.8/1.1ma)
(!) (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)
JAN-6080WC Sylvania used/good 1981 (81ma/98ma)