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(!!!!) (Best Value Pair) 71A RCA and Ken Rad used/good 1930's (22ma and 22.6ma)
(!!!!) (Highest Testing Pair) 71A Philco and Aristocrat test like new 1930's similar build (32.2ma and 32.5ma) 1-3% matched
(!!!) (Best Value Pair) 71A Sylvania branded Raytheon NOS 1947 (25.2ma and 29.2ma)
(!!!) (Good Pair) 71A Sylvania branded Raytheon NOS 1940's (25.8ma and 26.2ma)
(!!!) (Recommended Pair) 71A Sylvania and Sylvania branded Tungsol NOS 1947-1950 same build (30.2ma and 32.4ma) (Highest mA and Gm)
(!!) (Best Value Pair) 71A Philco and Aristocrat used/good 1930's similar build (25.6ma and 27ma) (same Gm)
(!!) (Good Value Pair) CX-71A and 71A RCA/Cunningham Balloon used/good 1930 era (21ma and 18.5ma) (same Gm)
(!!) (Pair) 71A RCA Victor and Super Silvertone used/good 1930's - 1940's (21.5ma and 25ma) (Same Gm)
(!!) 71A Philco used/good 1930's (18.5ma)
(!!) 71A RCA/Cunningham NOS 1940 era (20ma)
(READ REVIEW) 71A RCA branded Arcturus NOS 1940 era (22.6ma and 23.8ma) (same Gm)
171A RCA Radiotron Balloon used/good 1932 (20ma)
71A Cunningham Balloon used/tests like new 1930's (30ma)
71A Raytheon 4-Pillar box-plate used/good 1930's (23ma)
71A Raytheon 4-Pillar box-plate used/strong 1930's (24.8ma)
71A Super Silvertone by Sylvania engraved base NOS 1937 (19ma)
71A Sylvania NOS 1947 (25.3ma)
71A Sylvania used/good 1930's (21ma)
