(!!!!) (SINGLE) 12AU7A GE NOS 1963 copper grid posts (8.9/10.2ma)

1 low noise tube) 12AU7A GE NOS 1963 (warm / smooth / sweet sound, not bright)

1 section) 8.9ma Gm=2000

1 section) 10.2ma Gm=2200

Tested on Amplitrex

– Unison Research

– Head-Direct EF1 preamp

– Allen & Heath VF-1 compressor

– Ray Samuels

– Eastern Electric DAC

– Lexicon Signature 284

– Bravo