(!!!) (Recommended Pair) 12BZ7 RCA NOS 1969 (1.6/2.1ma and 1.8/2.2ma) (High Gm)
By Tube World
1 matched pair) 12BZ7 RCA gray plates NOS same date codes (CQ=1969)
1 tube) 1.6/2.1ma Gm=3000/3300
1 tube) 1.8/2.2ma Gm=3000/3500
Amplitrex Matched
Vplate=250V
Vgrid=-2V
Good Iplate = 2.0 - 2.5ma
Good Gm = 3000-3500
(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
 (Recommended Pair) 12BZ7 RCA NOS 1969 (1.6/2.1ma and 1.8/2.2ma) (High Gm)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/products/8.jpg?v=1633441740){kind=link}
 (Recommended Pair) 12BZ7 RCA NOS 1969 (1.6/2.1ma and 1.8/2.2ma) (High Gm) "Pin It")