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(!!!) (Recommended Single) 5Z3G RCA NOS 1954 (58/40 and 60/40)
(!!!) (Recommended Single) 5Z3G RCA NOS 1957 (58/40 and 60/40)
(!!!) (Recommended Single) 5Z3G RCA NOS 1957 (60/40 and 62/40)
(!!!) (Recommended Single) 5Z3G RCA NOS 1957 (60/40 and 63/40)
(!!!) (Recommended Single) 5Z3G RCA NOS 1971 (56/40 and 58/40)
(!!!) CX-380 Cunningham Balloon used/good 1930 era (46/40 and 56/40)
(!!) (Best Single) 26 Deforest Audion balloon tests like new 1920's (8.3ma, Gm=1300)
(!!) (Best Single) UX-120=20 Radiotron used/tests like new 1920's (7.3ma)
(!!) (Best Value Pair) 71A Philco and Aristocrat used/good 1930's similar build (25.6ma and 27ma) (same Gm)
(!!) (DISPLAY TUBE) 180 Arcturus Blue 1930 era (does not work - display tube only)
(!!) (Pair) 71A RCA Victor and Super Silvertone used/good 1930's - 1940's (21.5ma and 25ma) (Same Gm)
(!!) (Recommended Pair) CX-112A Cunningham Balloon engraved base used/good 1930 era (6.2ma and 7.0ma) (same Gm)
(!!) (Recommended Pair) UX-171A and CX-371A RCA/Cunningham Balloon used/test like new 1930 era same build (24.6ma and 27.2ma) (same Gm)
(!!) (Single) 201A=UV-201-A Supertron Hoboken New Jersey NOS 1926 (2.5ma) (good Gm)
(!!) (Single) UX-120=20 Radiotron used/60% 1920's (4.8ma)
(!!) 26 Cunningham NOS 1946 (5.4ma, Gm=1000)
(!!) 26 GE NOS 1946 (6.7ma, Gm=1200)
(!!) 26 RCA NOS 1946 (4.3ma, Gm=900)
(!!) 26 Super Silvertone by National Union NOS 1940's (5.7ma, Gm=1200)
(!!) 26 Tungsol NOS 1945 (4.4ma, Gm=1000)
