(!!!!) (Best Pair) EF89=6DA6 Telefunken Germany <> bottom NOS 1966 (8ma and 8ma) 1-2% matched

1 matched pair) EF89=6DA6 Telefunken Germany <> Diamond Bottom NOS 1966

1 tube) 8ma Gm=3400

1 tube) 8ma Gm=3500

Tested on Amplitrex

Good Ma range = 7-8ma

Good Gm range = 3000-3500

for:

Telefunken OPUS 6 from 1956
Blaupunkt radio