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(!!!) (Best Single 1953) JG-5814 GE NOS "square getter halo" and "short wide ribbed dark black plates" 1953 in white box (11.0/12.5ma)
(!!!) (Best Value) 6SN7GT Sylvania used/good 1951 (7.8/12ma)
(!!!) (Set of 10 tubes) 12AT7 GE NOS 1961 (set of 10 individual tubes)
(!!!) (Good Value Single) 12AU7 EICO Holland used/good 1961 (8.0/9.6ma)
(!!!) 12AU7WA Mullard branded Chelmer Valve used/good 1961 (7.7/8.8ma)
(!!!) 12AX7 Sylvania 1960-1965 used/tests like new small mica flake inside tube (Gm=2400/2800)
(!!!) 12AY7 GE NOS rebranded Raytheon 1960's (2.8/3.4ma)
(!!!) 12BH7A RCA branded Zenith NOS 1970 era (10/13.2ma)
(!!!) 12SN7GTA Sylvania branded RCA used/good 1967 (10/12.5ma)
(!!!) 286A Western Electric "top printing" NOS 1942-1945 (6.6ma)
(!!!) 286A Western Electric "top printing" NOS 1942-1945 (6.9ma)
(!!!) 286A Western Electric "top printing" NOS 1942-1945 (7.3ma)
(!!!) 286A Western Electric Engraved Base NOS 1930's (6.6ma)
(!!!) 286A Western Electric NOS "top printing" 1942-1945 smaller side getter (7.6ma)
(!!!) 311B Western Electric used/like new condition 1960 (25ma)
(!!!) 418A Western Electric NOS 1952 original box (34ma)
(!!!) 418A Western Electric NOS 1952 original box (41ma)
(!!!) (slightly microphonic) JRC-5751WA RCA black plates triple mica D getter 1957 NOS (2.3ma/2.2ma) (1-3% section balance
(!!!) (Best RCA Single) 6072 RCA gray plates NOS 1964 (2.6/3.1ma) (Fender, Apex)
(!!!) (Best Value Single) 6922=E88CC Tesla Czech Republic NOS 1967 (12/15.7ma) (mis-matched Gm) (recommended for mic)
