(!!!!) (Best Value Single) 6X5GT Philips Miniwatt Australia NOS 1940's (49/40 and 50/40)
(!!!!) (READ REVIEW) 6106 Bendix rebranded 5Y3WGTA Heintz & Kaufman NOS (67/40 and 70/40)
(!!!!) (READ REVIEW) GB-5931 Sylvania brown base gold brand 1960's (60/40 and 65/40)
(!!!!) (Recommended 6106) 6106 Bendix rebranded 5Y3WGTA Heintz & Kaufman NOS (67/40 and 68/40)
(!!!!) (Recommended GE Pair) 5U4GB GE NOS 1966 (56-59/40 and 56-58/40)
(!!!!) (Recommended GE Pair) 5U4GB GE NOS 1968 same date codes (58-60/40 and 58-60/40)
(!!!!) (Recommended Pair) 5U4GB RCA NOS and like new 1962 (56-58/40 and 56-58/40)
(!!!!) (Recommended Pair) 6CA4 RFT East Germany (Funkwerk) NOS 1970's (48-48/40 and 49-49/40)
(!!!!) (Recommended Pair) 6CA4 RFT East Germany (Funkwerk) NOS 1970's (47-48/40 and 48-48/40)
(!!!!) (Recommended Pair) 6CA4 RFT East Germany (Funkwerk) NOS 1970's (48-48/40 and 48-49/40)
(!!!!) (Recommended Pair) 6CA4 RFT East Germany (Funkwerk) NOS 1970's (49-49/40 and 48-49/40)
(!!!!) (Recommended Pair) 83 GE NOS 1960's (62-65/40 and 62-63/40)
(!!!!) (Recommended Single) 6X5GT Philips Miniwatt Australia NOS 1940's (54/40 and 56/40)
(!!!!) (Recommended Single) GZ34 Mullard UK NOS 1975 (59/40 and 60/40)
(!!!!) (Recommended Single) GZ34 Mullard UK NOS 1975 (60/40 and 60/40)
(!!!!) (SINGLE) EZ81 Bogen Mullard Blackburn UK "D" getter like new 1963 (56/40 and 57/40)
(!!!!) 5AS4A Raytheon "D" getter 1960 era (58/40 and 62/40) (uprated 5U4GB)
(!!!!) 5U4G GE NOS 1952 (55/40 and 51/40)
(!!!!) UX-280 RCA Radiotron Balloon used/60% 1930 era some white oxide flakes inside tube (38/40 and 38/40)
(!!!) (Best Pair 1957) 5Z3G RCA NOS 1957 in gold colored boxes slightly tilted glass (59-60/40 and 60-60/40)
