On 3 Oct 2005 at 0:39, Bob Bruhns wrote: > That's amazing. Can't argue with success. And > the 7.5W-300V-16K p-p adds up. The published > 12AX7 plate dissipation spec must be overly > conservative, and the cathode must be pretty > efficient. > > I always thought of the12AX7 as an audio preamp > tube.
It is... There HAS to be a good reason why manufacturers used things like 6AQ5 and 6BM8 for 4 watt audio output stages instead of a 6C4 or 12AX7 !!
