7B7 Sylvania NOS 1957 (72/43) (Best Single)
7B7 Tungsol NOS 1949
7C5 Philco Sylvania used 1940's (46.6ma)
7C5 Sylvania branded GE used 1951 (47ma)
7C6 RCA Victor like new 1948-1950 (23/15)
7C6 Sylvania branded CBS Hytron NOS 1952 (23/15)
7C6 Sylvania branded Raytheon NOS 1950's (1 in stock)
7C6 Sylvania branded RCA NOS 1952
7C6 Sylvania branded Tungsol NOS 1950's
7C6 Sylvania NOS branded RCA 1952 (24/15)
7X7=XXFM Sylvania branded Emerson NOS 1949 (97/60)
84=6Z4 RCA NOS GT-shape glass slightly tilted glass 1967 (44/40 and 47/40)
84=6Z4 RCA NOS GT-shape glass tilted glass 1967 (47/40 and 48/40)
99=X-199 Silvertone NOS 1934 (2.5ma, Gm=500) (strong single)
99=X-99 RCA Radiotron NOS 1930's in sealed box (2.2ma)
CX-299=99 Cunningham NOS 1930 era (2.1ma)
UX-199=199 RCA Radiotron NOS 1930 era (1.7ma)
