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(!) (SINGLE) 7027A RCA NOS 1968 (85ma)
(!) (Single) 7189 Mullard UK used/strong 1962 (43.8ma)
(!) (Single) 7591 EICO Westinghouse used/70% 1961 top edge of base is chipped (42ma and Gm=7350)
(!) (SINGLE) 841=VT-51 Hytron NOS 1940's (5.2ma Gm=1200)
(!) (Single) EL34 Mullard XF2 double halo "O-O" used/70% 1962 (62.5ma)
(!) (sold out) F2a Siemens NOS 1960's (112ma) Tested on Amplitrex (sold out)
(!) 17BF11 GE Admiral NOS 1960's (80-82/60) (CAYIN)
(!) 17BF11 Westinghouse Japan 1970's (80-82/60) (CAYIN)
(!) 203A Sylvania brass base tests like new 1930's
(!) 247=47 RCA Balloon used/60-65% 1930's (20ma)
(!) 247=47 Tungsol Balloon used/good 1930's (23.2ma)
(!) 31 Ken Rad NOS engraved base 1940 era (11ma)
(!) 31 Tungsol NOS 1940's (11.8ma)
(!) 47 Raytheon engraved base box plate used/good 1930's (25.2ma Gm=1940)
(!) 47 RCA Radiotron Balloon used/good 1930's (23.4ma)
(!) 47 RCA Radiotron engraved base used/good 1930's (27.5ma Gm=2250)
(!) 47 Tungsol Aristocrat low hours/tests like new 1940's (38ma Gm=2770) (highest mA and Gm)
(!) 5C22 ITT Electron Tube Division low hours/good condition 1967 some scratches on the base
(!) 6080 RCA gray plates NOS 1974 (74ma/105ma)
(!) 6BQ5 GE used/good 1960's (35.5ma)
