The power scaling idea does seem interesting, but it seems to be something exclusive to distorted sounds. I mean, it's hard to imagine an amp putting out a decent clean tone at drastically lowered voltages. Like anything, I won't be able to really form an opinion about it until I experiment with it myself. Thanks for the link to the article... I'm not willing to pay $80+ for the TUT book just to learn about how he wires up a voltage regulator!
I suppose I could just start from scratch with a regulator design. The Art of Electronics
certainly has all I'd ever need to learn about regulators... and it's a book I WAS willing to pay $80+, because it's REAL knowledge, not some amp mojo silliness. Seriously, I might consider purchasing TUT if I could actually read through it first and see if it's actually worth the money. It took me only five minutes of browsing in Barnes & Noble to be sold on The Art
. Anyway, I know the main mojo behind the Power Scaling design is that it scales the biasing to match up with the plate voltage level.