In SX Microcontrollers, SX/B Compiler and SX-Key Tool, dpaton wrote:

Andrew-

Good luck with your dad. My degree is in EE, and I'm pretty hard core about audio, and as much as I'd like to defend my lateral FETs with a clear advantage, the clear delineations between tubes and SS get blurry when you work at the highest echelons of performance. That said, 99% of SS amps will STOMP glass amps based on phase response, low end power, dampening factor, and transient response. Not to mention power density and durability. What I'm waiting for is a speaker with flat phase and frequency response that can reproduce a squarewave coherantly. Only then can I be sure I'm hearing exactly what I record.

Triacs would be a bad idea for volume control. Even tho they're 'bidirectional' rectifiers, they introduce stuff into the signal that's bad. Can you imagine a phase-angle chopped volume control? It'd sound like a squarewave on drugs. Ick.

It sounds like you're set for scrounging. If you can secure an aluminum billet and a day or so of CNC time with one of them, you can build some awesome custom heatsinks. I'm jealous.

Günther-

I remember the SXploded post in great detail. It was fun to look at, but a terrible thing to do to a wonderful chip.
I work with things from 1.8VDC up to 480VAC, and when some things pop around here, it can be a really amazing thing. A fire extinguisher  and a blast shield are required safety equipment for initial powerup of a few products. I still have a mark on my chest from shrapnel kicked out by a personal project of mine some time ago. Half an inch to the left and I woulnd't be typing this. High power is not for the faint of heart ;-)

-dave

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