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(!!) (Best Value Single) EL34 Mullard branded GE XF2 double halo "O-O" used/good 1964 (69ma)
(!!) (Best Value Single) JAN-5670W GE NOS 1986 (10/7.5ma)
(!!) (Good Value) 12AX7 Siemens Halske Germany rebranded "BOGEN" used/good 1960 (161 Series) (Gm=1400/1500 and 0.8/0.9ma)
(!!) (Recommended Single) 12BZ7 RCA gray plates NOS 1968 mica slightly tilted (2.1/2.2ma) (High Gm)
(!!) (slightly microphonic single) 12BZ7 RCA gray plates NOS 1966 (2.3/3.0ma)
(!) (PAIR) 0D3 RCA NOS 1951-1969 same build (argon)
(!) (SINGLE) 6BQ5=EL84 Heath Mullard Great Britain used/good 1959 (40ma)
(!) (SINGLE) 6L6GC GE NOS 1970's (69.5ma)
(!) (slightly microphonic single) 12AU7 Hitachi JAPAN branded IEC Mullard NOS ribbed plates 1968 (9.4/11ma)
(!) 12AU7A Hitachi JAPAN branded Realistic Lifetime NOS ribbed plates 1960 era (9.2/12.2ma)
(!) 12BH7A GE gray oval plates "O" getter halo used/good 1964 (7.2ma/8.5ma)
(!) 6L6Y RCA metal can (Y=brown bottom) NOS 1964 (72ma)
(!) 6L6Y RCA metal can (Y=brown bottom) NOS 1966 (77ma)
0C3A Sylvania used/like new 1970's (single)
1C21 NOS
407A Western Electric NOS 1974 (32/26 and 34/26)
5R4GYB RCA used/very good 1964 (51/40 and 54/40)
6080 RCA black plates used/good 1956 broken guide pin (66/77ma)
6463 GE 5 Star NOS 1960 (14/20ma)
6463 GE NOS 1965 (12.0/12.6ma)
