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previous: Ricky is there any sonic differences in t... -- 1/10/2000 6:31 AM

Re: 12AT7 vs. 12AX7 for PI

1/10/2000 2:23 PM
Ken Gilbert	Re: 12AT7 vs. 12AX7 for PI Technically speaking the 12at7 is a far superior tube for driver applications. The wimpy (by comparison) 12ax7 should be used strictly for voltage gain applications, and the requirements for the driver are often current/slew rate/low impedance related. As such the 12ax7 has no business as a driver tube. The 12at7 has plenty of gain, a higher plate dissipation rating, and a much lower output impedance. In short, it is a better driver tube, especially if its increased max ratings (compared to the 12ax7) are taken advantage of. This will translate primarily into better HF reponse and transient recovery. Ken Ken

1/10/2000 2:23 PM

Ken Gilbert

Re: 12AT7 vs. 12AX7 for PI

Technically speaking the 12at7 is a far superior tube for driver applications. The wimpy (by comparison) 12ax7 should be used strictly for voltage gain applications, and the requirements for the driver are often current/slew rate/low impedance related. As such the 12ax7 has no business as a driver tube. The 12at7 has plenty of gain, a higher plate dissipation rating, and a much lower output impedance. In short, it is a better driver tube, especially if its increased max ratings (compared to the 12ax7) are taken advantage of. This will translate primarily into better HF reponse and transient recovery.

Ken

Ken

Replies:

John On that subject, who makes a good 1... -- 1/10/2000 9:35 PM
Jim S. On the other hand, it's common for ... -- 1/10/2000 9:57 PM