(slightly microphonic) 12BZ7 GE black plates NOS 1960's (1.5/2.5ma)

(slightly microphonic) 12BZ7 GE black plates NOS 1960's (1.5/2.5ma)

$ 12.99

1 slightly microphonic low noise tube) 12BZ7 GE black plates NOS 1960's

1 section) 1.5ma Gm=2000

1 section) 2.5ma Gm=2800


- Most 12BZ7 are slightly microphonic due to their very high gain and

high Gm


(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)

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- Cary PH-301 phono
- Cary Rocket 88R
- Audio Electronics Supply/Cary Six Pacs

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