(!!!) (Recommended Single) 12BZ7 RCA gray plates branded Tungsol NOS 1960's (2.0/2.1ma) 1-2% section balance

1 low noise tube) 12BZ7 RCA gray plates branded Tungsol NOS 1960's 2.0ma Gm=2900 2.1ma Gm=3000     (Max ratings: 300Vplate, 1.5 watts)(Vfil=12.6V @ 300ma)(Typical Operation Class A amp: Vplate=250V, Vgrid=-2V, Ip=2.5ma, Rp=31.8Kohms, Gm=3200, Mu=100)(The 12BZ7 has been subbed for a 12AX7 in some circuits)(The 12BZ7 has 2 times the Gm (3200 versus 1600) and lower plate resistance (31K versus 62K) and higher filament current (300ma versus 150ma) than a 12AX7)(The 12BZ7 was designed primarily for use as a sync separator and sync amplifier in television receivers. It is also useful in clipping circuits and as a general purpose audio amplifer) - Cary V12R amp- Cary PH-301 phono- Cary Rocket 88R- Audio Electronics Supply/Cary Six Pacs