(!!) (#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)
– Fisher 500C
– Milbert TC-4R Crossover