(!!!!) (Best Overall Pair) 6L6G=VT-115A RCA black plate coated glass NOS mid-1940's (81ma and 82.8ma) (rare) (same Gm)
(!!!) (Best Pair) 6C5 RCA / RCA Victor metal can NOS 1950-1951 (8.2ma and 8.8ma)
(!!!) (BEST PAIR) JAN-CRC-5693 RCA NOS 1961 original boxes (2.9ma/3.0ma) (same Gm) (premium low noise 6SJ7) (Peluso, Gibson)
(!!!) (Best Value Black Plate single) 6L6GC RCA Conn black plate used/good 1962 (67ma) (Gm like new)
(!!!) (Pair) 6C5 Raytheon metal can NOS 1950 (7ma and 8ma)
(!!) (Best Single) JAN-5693 GE JAN Black Can NOS 1978 (3.0ma)
(!!) (Best Single) JAN-CRC-5693 RCA red can NOS 1961 (3.4ma) (Peluso, Gibson)
(!!) 5693 RCA red can NOS 1949 (2.9ma)
(!) (Recommended Single) 6EU7 RCA NOS 1970's (51/32 and 60/32)
5693 RCA branded Raytheon used good 1960 (2.2ma)
5693 RCA branded Raytheon used good 1960 (2.7ma)
5693 RCA used good 1958 (2.4ma)
6C5 Ken Rad metal used/good 1940's (6.5ma)
6C5 Philco metal used/good 1952 (8.2ma)
6C5 RCA JAN NOS 1961 (8.2ma)
6C5 RCA metal used/very good 1964 (7.7ma)
6C5 RCA NOS 1946 (8.4ma)
6C5 RCA NOS 1951 (7.7ma)
6C5 Wards Airline by GE used/tests like new 1946 (9.0ma)
6C5G National Union used/good 1940 era (6.2ma)