(!!) (Recommended Pair) 6HA5=6HM5=EC900 Amperex Holland “”Globe Logo”” NOS in white boxes 1971-1972 (17ma and 18ma) (Highest mA and Gm)

1 matched pair) 6HA5 Amperex Holland “”Globe Logo”” NOS in white boxes 1971-1972

1 tube) 17ma Gm=19,600

1 tube) 18ma Gm=18,800

Matched on Amplitrex

Good Ma range 10-11ma

Good Gm range 12-14,000

– Wright Sound Model 11 preamp (phono stage)
– Fisher 500C
– Milbert TC-4R Crossover