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(!!!!!) (Best Overall Pair) 7N7 Sylvania chrome top NOS 1950's 1-2% matched (8.6/8.6ma and 8.6/8.4ma) (same Gm) (best 6SN7 sub using adapter sockets)
(!!!!) (Recommended Pair) 7N7 Sylvania branded GE chrome top NOS 1954-1956 (7.4/7.0ma and 7.4/7.2ma) 1-2% matched
(!!!) (Recommended Pair) 7N7 Sylvania NOS branded GE and RCA 1960-1965 (9.4/8.0ma and 8.0/8.4ma) (close Gm)
(!!) (Best Single) 7N7 Sylvania branded Philco NOS parallel black plates 1940's (7.5/7.9ma)
(!!) 7N7 Sylvania branded Philco used/good short bottle parallel gray plates 1948 (7.2/7.6ma)
(!!) 7N7 Sylvania NOS 1960's (8.6/10.2ma)
(!) (Best Single) 7N7 Sylvania NOS 1960 era (10.8/11.2ma)
(!) (Good Single) 7N7 Sylvania branded GE NOS 1961-1962 (7.5/8.3ma)
(BEST PRICE) 50X6 US Brands NOS (10 for $24.99)
(BEST PRICE) 7C5 US Brands used/good mostly 1950's (4 tubes for $16.99)
(BEST PRICE) 7X6 US Brands NOS (4 tubes for $9.99)
0E3=85A1 Amperex UK NOS 1962
0E3=85A1 Mullard UK NOS 1960's (2 in stock)
35A5 US Brands NOS (3 in stock) (Loktal Base)
50X6 US Brands NOS (11 in stock)
7A4=XXL GE NOS 1949 (102/50)
7A4=XXL National Union NOS
7A4=XXL Sylvania branded JEWEL NOS 1940's in tan box (118/50)
7F8 Sylvania used/good 1957 (34/25 and 38/25)
7N7 Sylvania branded RCA chrome top used/good 1956 (6.6/8.4ma)
