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(!!) (#1 800 black plate single) 800=VT-64 RCA black plate like new 1940's (52ma, Gm=2430) (tested on Amplitrex)
(!!!) 7025 RCA ribbed gray plates used/good 1960's (Gm=1350/1600 and 0.6./1.1mA) (V1 guitar amp)
(!!!) (Best Single #2) 6F6G RCA NOS 1940's (37.5ma)
(!!) 6E5 RCA NOS early 1970 era (bright eye) (2 in stock)
(microphonic tube) JRP-5687 Raytheon NOS black plates D getter NOS 1956 (36/41ma)
(!!) (2nd Best Quad) 6CL6 RCA FAA NOS 1963 (31.6, 33, 33, 33ma)
(!) (Best Value Single) 6FQ7 GE branded RCA NOS 1966 (7.6/7.2ma)
(1) (Best Value) 5V4G RCA used/tests like new 1954 (59/40 and 60/40)
(!) 6BE6 RCA NOS 1960's (1.1ma Gm=800)
(!!!) (Best RCA Pair #2) 6BL7GTA RCA clear top side getter NOS 1966-1969 (38.5/39.5ma and 40.5/36.0ma)
(!!!!) (Best Pair #1) 5881 Tungsol used/good 1960's (63.2ma and 66ma)
(!!) 6E5 RCA NOS 1961 (bright eye)
(!!) (GOOD VALUE SINGLE) 5687 Tungsol rebranded IBM bronze plates "U" getter used/good 1959 (29/36ma)
(!) 6EU7 RCA NOS 1970 era (51/32 and 52/32)
(!!) 71A RCA/Cunningham NOS 1940 era (20ma)
(!!!!) (Single) 12AT7 RCA NOS 1965 (7.2/12.8ma) (good tone)
(!) (BEST PAIR) 6CA4 RCA NOS 1960's - 1972 (54-56/40 and 54-54/40) (Wright, Counterpoint, Cary, Zanden)
6HS6 RCA NOS 1960's (7.2ma)
(!!!) (Single 1943) 6X5GT=VT-126B RCA black plates NOS 1943 (51/40 and 54/40) (Best Sound)
5V6GT GE NOS 1961 (47ma)
