(!!!!) (Best Pair) 80=U50 Marconi Madrid Spain tall bottle NOS 1949 (54-64/40 and 57-62/40)
(!!!!) (Recommended Pair) 6F6G Marconi Spain NOS 1940's (33.2ma and 34.2ma)
(!!!!) (Recommended Pair) 6F6G Marconi Spain NOS 1940's (35.2ma and 34.0ma)
(!!!!) (Recommended Pair) 6F6G Marconi Spain NOS 1940's (37.5ma and 39ma)
(!!!) (Recommended Pair) 12BZ7 National Union branded Admiral and Sylvania "U" getter NOS 1960-1961 era (1.6/1.6ma and 1.7/1.8ma)
(!!!) (Recommended Pair) 12BZ7 RCA NOS 1964 and 1968 (1.8/1.8ma and 1.8/1.9ma)
(!!!) 6BL7GTA GE branded Marconi NOS 1960 era tilted glass (46/53ma) (High Gm) strong single
(!!) (Best Pair) 6A7G Marconi Radiotron Canada NOS sealed NOS 1950's
(!!) 12AT7 Marconi Italy gray plates large "O" getter halo NOS 1960's (10.2/11.2ma)
(!!) 12AY7 GE branded Marconi "D" getter used/good 1950's (2.3/2.4ma)
(!!) 5814A RCA black plates used/good 1964 (7.2/8.4ma)
(!) (BEST SINGLE) 45 Sylvania branded RCA NOS 1952 getter stain top of glass (33ma)
(!) (Best Single) 6111 France NOS 1962 (7.6/8.2ma)
(!) (Best Single) 6111 France NOS 1962 (7.8/8.2ma) (best triode balance)
(!) (Best Single) 6111 France NOS 1962 (8.4/9.5ma)
(slightly microphonic) 12BZ7 CBS NOS rebranded Westinghouse early 1950's large D getter (2.4/3.3ma)
12DB5 US Brands NOS (6 in stock)
5R4GYA GE NOS 1959 (48/40 and 50/40)
6111 France NOS 1962 (6.3/7.4ma)