(!!) (#1 6HM5 Japan Pair) 6HA5=6HM5 Hitachi Japan branded RCA NOS 1970's (14.5ma and 15ma) (Highest Ma and Gm)

1 matched pair) 6HA5=6HM5 Hitachi Japan branded RCA NOS 1970's

1 tube) 14.5ma Gm=18,000

1 tube) 15.0ma Gm=18,500

Good Ma range 10-12ma

Good Gm range 12-14,000

- Wright Sound Model 11 preamp (phono stage)
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