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(!!) (Single) 46 RCA Radiotron / Cunningham Balloon used/good 1930's (46ma Gm=2200)
(Single) 46 National Union NOS 1950 era (56ma Gm=3000)
(Single) 46 Philco by Sylvania NOS 1940's (50ma Gm=2600)
(Single) 46 RCA NOS original box 1940's (59ma Gm=2900)
46=VT-63 Ken Rad used/tests like new 1940's (57.2ma Gm=2660)
