(!!!) (BEST PAIR #2) 47 RCA branded ARCTURUS NOS 1940's (34.5ma and 35.2ma)
(!!!) (BEST PAIR #3) 47 RCA branded ARCTURUS NOS 1940's (40ma and 40.2ma)
(!!) (Best Single) 47 RCA NOS 1949 (38.2ma Gm=2630)
(!!) (Recommended Single) 47 Raytheon NOS 1955 (35.6ma Gm=2680)
(!!) (Recommended Single) 47 Sylvania NOS 1952 (38.6ma Gm=2750)
(!!) (Single) 47 RCA Victor NOS 1940's (32ma Gm=2620)
(!) (#1 47 Single) 47 RCA NOS 1940's reprinted - small hairline crack in base (37ma Gm=2700) (highest Ma and Gm)
(!) 47 Cunningham used/good 1940's (26.6ma Gm=2020)
(!) 47 Raytheon engraved base box plate used/good 1930's (25.2ma Gm=1940)
(!) 47 RCA Radiotron engraved base used/good 1930's (27.5ma Gm=2250)
(!) 47 Sylvania branded Philco used/very good 1940's (28.6ma Gm=2650)
(!) 47 Tungsol Aristocrat low hours/tests like new 1940's (38ma Gm=2770) (highest mA and Gm)
47 RCA used/good 1940's rebranded Silvertone (30ma Gm=2150)
PZ=47 Arcturus Blue NOS low emission (display tube)
