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Originally Posted by AAngel
BTW, I did find the little note in the Quark manual saying that if you need finer low speed control, you should narrow the neutral range, so this is probably why zpb has such fine low speed control and I don't. They do warn that running a narrow neutral range can cause cogging. I'll have to try it.
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Yeah, I narrowed my neutral range and can go VERY slow without cogging.
About the floating PCB; I kinda figured. Makes sense that it wasn't cooling if the FETs weren't even attached to the case! I know it's kind of a crappy solution, but S&T probably uses the pad so that they can remove it easily for service. Unfortunately, it doesn't last long. Once you do the "internal mod", your heat problems should be over. I say "should" because with your luck, it won't work. ;)
Adding caps should help even more...