1 matched pair) 6U8A GE NOS 1965-1968 era same build
1 tube) 12ma Gm=6600 (triode) and 7.0ma Gm=4600 (pentode)
1 tube) 12ma Gm=6800 (triode) and 7.4ma Gm=4900 (pentode)
Matched on Amplitrex
– VOX
– Radford STA-15 Series III 1965
– McIntosh MX-110
– Grommes PHI-26


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