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(!!!) (Best Single) 26 RCA ST-14 tests like new 1952 (8.5ma)
(!!!) (Best Value Pair) 12A Sylvania NOS and Philco like new 1930's - 1940's same build (6.7ma and 6.8ma)
(!!!) (Best Value Pair) 26 RCA ST-14 engraved base used/good 1930's (3.9/4.0ma)
(!!!) (Best Value Pair) 26 RCA/Cunningham ST-14 used/good 1940's (3.8ma and 3.8ma)
(!!!) (Best Value Pair) 47 RCA branded ARCTURUS NOS 1940's (33.2ma and 33ma)
(!!!) (Good Value Pair) 26 Super Silvertone ST-14 engraved base used/good 1930's (4.3ma and 4.8ma)
(!!!) (Recommended Pair) 26 GE and Ken Rad NOS same build 1940's (3.9ma and 4.0ma)
(!!!) (Recommended Pair) 26 Sylvania branded Zenith black plate NOS 1946 (4.9ma and 5.0ma) (rare) 1% matched
(!!!) (Recommended Pair) CX-326 Cunningham balloon used/good 1930 era (5.0ma and 5.2ma)
(!!!) (Recommended Single) 127 Arcturus Blue Balloon used/good 1930 era in white box (4.3ma)
(!!!) (Recommended Single) C-299=UV-99 Cunningham NOS 1920's (2.3ma) (highest Ma) (UV have small pins) (strong Gm)
(!!!) (Recommended Single) C-299=UV-99 Cunningham NOS 1920's with tube data sheet (2.4ma) (highest Ma) (UV have small pins) (strong Gm)
(!!!) CX-380 Cunningham Balloon used/65% 1930 era some white oxide flakes inside tube (39/40 and 44/40)
(!!) (Best Single) 26 Deforest Audion balloon tests like new 1920's (8.3ma, Gm=1300)
(!!) (Best Single) UY-227 RCA Radiotron Balloon tests like new 1930 era (10.2ma)
(!!) (Best Value Pair) 71A Philco and Aristocrat used/good 1930's similar build (25.6ma and 27ma) (same Gm)
(!!) (DISPLAY TUBE) 180 Arcturus Blue 1930 era (does not work - display tube only)
(!!) (Pair) 71A RCA Victor and Super Silvertone used/good 1930's - 1940's (21.5ma and 25ma) (Same Gm)
(!!) (Recommended 27 Balloon) C-327 Cunningham Balloon mesh-plate used/very good 1930's (5.2ma)
(!!) (Recommended Pair) CX-112A Cunningham Balloon engraved base used/good 1930 era (6.2ma and 7.0ma) (same Gm)
