That's how circuits get burnt up, errrrr Oops, looks like I already took care of that, lol. At least in your case you were undervolting it.
This ran very hot with the 24VCT trafo since I could really crank it loud. Not to hot I couldn't touch it, putting a cheap thermomoter on the heatsink read 115F after on hour of being cranked to just below audible distortion volume level. I never really ran it that long with the 28VCT trafo, at this point I can't tell ya until I get the other board built, but it never got that hot.
This is a good point, in my opinion this is almost the only reason left why I'm having this issue.
I wish I had a way to bring down the voltage using components I have on hand. My LM7818/LM7819's are only good up to 1 amp, my LM338K's won't work because the trafo is center tapped, not independant secondaries.
Any ideas on a regulated PSU using a minimal parts board ,easily available components, and that don't cost an arm and a leg? I don't have much room in my case once I get everything mounted.
Or I could just opt for another trafo just like my 24VCT, run them paralled to get the added amperage needed. That is probably the best solution on this, another $5 and the same amount of space (or less) than the regulated PSU would take up. Anyone see any issues with this?
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I honestly coulda sworn my sub was 8 ohms, but I just double checked and it is indeed 4 ohms. It could be why the extra voltage/amps was causing it to clip. I got involved in another project, so I still haven't built that 2nd kit yet. Soon as I do I will try it with my 8 ohm sub and see how that goes.
Thanks for pointing out an obvious mistake on my part.
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