6DN7 RCA Mexco coin-base same internals as Sylvania NOS 1970”s (40ma and 8.5ma)

1 tube) 6DN7 RCA Mexco coin-base same internals as Sylvania NOS 1970”s

40ma Gm=12,500

8.5ma Gm=2600

Tested on Amplitrex

1 section) Good NOS Ma=35-40ma and Gm=7000-7700

1 section) Good NOS Ma=8ma and Gm=2500

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