Class D is just Dandy!

One thing I do not agree with Putzeys on is that reality is logical. Reality IS. We can understand it logically, emotionally, sexually, spiritually, intuitively.. or, hopefully, all of the above and more.

I would like to hear more impressions of that ATI amp...how is it performing now that it has a few days on it?

You can use a Tube stage to slow down the signal or other circuit designs in solid stage to do that as well.

Agreed- **and** FWIW, there does not have to be anything slow about tubes. Keep in mind that in order for color TV to have existed, tubes had to be able to operate with bandwidth over a range of multiple MHz.

Tubes are only slow because of the design of the circuit, not because of tubes in general. In fact you can build a class D amp using tubes as the output switching devices, and switch them at some really crazy high frequencies- in excess of 100MHz- and likely with no need for dead time circuitry. That's pretty fast! I'm pretty sure solid state isn't there yet (but that's off the top of my head; haven't checked).

in excess of 100MHz- and likely with no need for dead time circuitry

This would be a spectacular improvement upon the state of the art. I can't wait to see it in real life.

Don't even need a working amplifier to try this, just hook up two tubes and have them switch back and forth as you suggest. Please post the pics of the results. By pics, I mean of the smoke. :)

Best,


Erik