(!!!!!) (Best Overall Quad) 10Y=VT-25 SYLVANIA NOS 1940's (28, 28, 28, 28.8ma) 1-3% matched
(!!!!!) (Best Pair) 10Y=VT-25 SYLVANIA NOS 1940's (25.0ma and 25.6ma) 1-3% matched (same Gm)
(!!!!!) (Best Pair) 10Y=VT-25 SYLVANIA NOS 1940's (25.2ma and 26.2ma)
(!!!!!) (Best Pair) 10Y=VT-25 SYLVANIA NOS 1940's branded National 1962 (25.8ma and 26.4ma) 1-3% matched (same Gm)
(!!!!) (2nd Best Pair) JHY-6AK5 Hytron black plate NOS 1952 (9.8ma and 9.4ma) 1-5% matched
(!!!!) (Best Overall Pair) JHY-6AK5 Hytron black plate NOS 1952 (8.1ma and 8.1ma) 1-2% matched
(!!!!) (Pair) 0D3 Hytron NOS and like new 1948 (argon)
(!!!!) (Recommended Pair) JHY-6AK5 Hytron black plate NOS 1952 (7.3ma and 7.6ma)
(!!!!) (Recommended Pair) JHY-6AK5 Hytron black plate NOS 1952-1953 (7.5ma and 7.6ma)
(!!!) (Best Pair) 864=VT-24 Hytron USA NOS 1940's (3.1ma and 3.1ma)
(!!!) (Best Pair) 864=VT-24 Hytron USA NOS 1940's (3.2ma and 3.2ma)
(!!!) (Best Pair) 864=VT-24 Hytron USA NOS 1940's (3.4ma and 3.4ma)
(!!!) (Recommended Pair) JHY-6AK5 Hytron black plate NOS 1952 (5.8ma and 5.8ma)
(!!!) (Recommended Pair) JHY-6AK5 Hytron black plate NOS 1952 (8.0ma and 8.2ma)
(!!) (BEST PAIR 1950's) 0C3 CBS NOS 1955 (argon)
(!!) (Recommended Single) 5Y3GT Hytron NOS 1951 (56/40 and 60/40)
(!!) 0C3 Sylvania branded GE NOS 1972-1976 (1 Pair)
(!!) 6V6GT Philco by Sylvania tests like new 1957 (42.2ma)
(!) (Best Single) 5Z3G Hytron NOS 1947 (51/40 and 51/40)
(!) (Best Value Pair) US Navy-CNU-1626 National Union NOS 1940's (30ma and 32.5ma)