(!!!!!) (Best Overall Pair) 7N7 Sylvania chrome top NOS 1956-1957 1-3% matched (8/9ma and 8.6/8.4ma) (best 6SN7 sub using adapter sockets)
(!!) (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)
(!) (SINGLE) 7N7 Sylvania TALL BOTTLE branded Hytron parallel black plates chrome top NOS 1952 (6.6/8.3ma)
(!) (SINGLE) 7N7 Sylvania TALL BOTTLE branded Hytron parallel black plates chrome top NOS 1952 (7.6/7.8ma)
(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)
7F8 Sylvania used/good 1956 (34/25 and 39/25)
7F8 Sylvania used/good 1957 (34/25 and 38/25)
7N7 Philco by Sylvania chrome top "parallel black plates" used/good 1949 (8.4/8.0ma)
7N7 Sylvania branded GE chrome top used/good 1956 (6.0/6.2ma)
