(!!!!) (Best Pair #1) 12BH7A RCA gray plates NOS 1969 (10.2/10.4ma and 11/12ma)

1 low noise tube) 12BH7A RCA gray plates NOS 1969 1 tube) 10.2/10.4ma Gm=3000/3100 1 tube) 11.0/12.0ma Gm=3200/3300   Tested on Amplitrex Good NOS Ma range 8-12ma Good NOS Gm range 2800-3200 Low Noise and not microphonic   Recommended for - McIntosh- VTL- Manley- Kora Hermes DAC in place of 12AU7- Octave M90 mono amps (http://www.octave.de/)- BLACKSTAR HT-5 (replacing Sovtek)- Luxman MA-88 amp- Requisite Audio preamp- Teletronix LA-2A Compressor/Limiter- Art Audio Diavolo amp- Ray Samuels- Kendrick Solo 7- Valvet L1