(!) (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)
(!) JAN-CLRV-6SN7WGTA GE Canada brown base NOS 1970 (7/10ma)
(slightly microphonic) JAN-CHS-6SN7W Sylvania "SHORT BOTTLE" used/good 1945 (7.0/7.6ma)
6AH4GT RCA NOS 1960's (17.5ma)
6AH4GT Sylvania branded Hytron narrow plate "D" getter 1952 used/good (26ma)
6AH4GT Sylvania branded Raytheon chrome top 1956 (21ma)
6AH4GT Sylvania chrome top NOS 1950's (22ma)
6AH4GT Sylvania rebranded GE low hours/like new 1960's (27ma)
6X5GT GE used/good 1951 (49/40 and 50/40)
6X5GT GE used/good 1963 (48/40 and 49/40)
6X5GT Ken Rad 1940's used/good (51/40 and 53/40) (RCA construction)
6X5GT Philco by Sylvania used/good 1940's tilted top mica (54/40 and 60/40)
6X5GT RCA branded Raytheon NOS 1950's (51/40 and 52/40)
6X5GT Sylvania chrome top NOS 1958 (51/40 and 52/40)
6X5GT Tungsol no printing used/good 1940's (55/40 and 68/40)
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)
7N7 Sylvania branded RCA chrome top used/good 1956 (6.6/8.4ma)
7N7 Sylvania chrome top branded GE low hours/tests like new 1957 (7.4/11.4ma)
