(!!!!) (BEST PAIR) 6DN7 GE branded GE and CBS NOS 1959 same build (46.4/46.5ma and 8/9ma)

1 pair) 6DN7 GE branded GE and CBS NOS 1959 same build

1 tube) 46.4ma Gm=8100 and 8ma Gm=2400

1 tube) 46.5ma Gm=9000 and 9ma Gm=2600

Tested on Amplitrex

1 section) Good Ma=30-35ma and Gm=6000-7000

1 section) Good Ma=7-9ma and Gm=2400-2500

– Bottlehead S.E.X. amp (Headphone amp)
– Bottlehead SMACK
– CONN organ console amp 1970”s 2 channel
– MFA Luminence preamp 1990