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(!!!) 7025 RCA ribbed gray plates used/good 1960's (Gm=1350/1600 and 0.6./1.1mA) (V1 guitar amp)
(!!!) 80 RCA used/strong new 1946 (54/40 and 58/40)
(!!!) 80 RCA Victor NOS 1948 (56/40 and 58/40)
(!!!) 8417 GE NOS 1986 (103.5ma)
(!!!) CX-301-A Cunningham NOS 1930 era (2.6ma Gm=800)
(!!!) CX-380 Cunningham Balloon used/good 1930 era (46/40 and 56/40)
(!!!) CX-380 Cunningham Balloon used/good/70% 1930 era (42/40 and 44/40)
(!!!) USN-CRC-1629=VT-138 RCA NOS 1940 (bright eye) (oldest single)
(!!!) UX-213 (sub for Type 80) Rectron Balloon 1920's used/60% thropiated tungsten filaments (38/40 and 38/40) (rare)
(!!!) UX-280 RCA Radiotron Balloon used/good 1930 era some white oxide flakes at bottom of tube (46/40 and 48/40)
(!!) (#1 6HM5 Japan Pair) 6HA5=6HM5 Hitachi Japan branded RCA NOS 1970's (14.5ma and 15ma) (Highest Ma and Gm)
(!!) (#1 7551 Pair) 7551 RCA black plate branded Motorola NOS 1970's (45.2ma and 46ma)
(!!) (#1 7551 Pair) 7551 RCA black plate branded Motorola NOS 1970's (48ma and 48.2ma)
(!!) (#1 800 black plate single) 800=VT-64 RCA black plate like new 1940's (52ma, Gm=2430) (tested on Amplitrex)
(!!) (#1 81 Balloon) 81 Arcturus Balloon used/tests like new engraved base 1930's like new condition (53/40)
(!!) (#2 6HM5 Japan Pair) 6HA5=6HM5 Hitachi Japan branded RCA NOS 1970's (12ma and 13ma)
(!!) (#2 800 gray plate) 800=VT-64 RCA gray plate NOS late 1940's (47.5ma, Gm=2150) (tested on Amplitrex)
(!!) (#3 7551 Pair) 7551 RCA black plate branded Motorola NOS 1970's (44ma and 45ma)
(!!) (#4 Type 30 PAIR) USN-CRC-30 RCA NOS 1940's "L" bracket (2.4ma and 2.8ma)
(!!) (1 Pair) 30 RCA Cunningham NOS 1946 (2.6ma and 3.1ma)
