(!) 6189=12AU7A GE NOS 1975 (9.6/10ma) 1-2% section balance

1 low noise tube) 6189=12AU7A GE NOS 1975 copper grid posts in white box

(warm / smooth / sweet sound, not bright)

9.6ma Gm=2200

10ma 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