Big Katuna wrote:
Have you measured any temperatures on the devices? Mostly rated for 90 degree C junction temps which is pretty hot. Too hot to touch.
Just a little air movement is needed to break up the laminar air flow.
Dang! My error. I failed to explain this right. High junction temperature radiates lots of BTU's. Where my knees start knocking is when I read jim in Denver's report of unplanned Megawatt demise.
Landy's cheapo obviously burned out more than the bi-polar devices after he overload-waterboarded it. one stupid resistor, one IC, one ANYTHING fails and I am left something worth only hurling at barking dogs. Moonshot mentality must prevail here. It's an expensive attitude. A 400-amp rated shottky isolation rectifier, a mil-spec electroswitch that cost more than 100 dollars thirty years ago (SOLID silver contacts) Bourne A grade 100,000 cycle precision pots. Hospital green dot power cord. All low and high voltage pilot lights are mil-spec LED. A killer transient voltage protection package.
The Mega can digest a very wide input voltage and frequency range without so much as a hiccup.
Wait until Niner posts my images. The stupid circuit board has circulation vents BELOW it but no flow path to pass thermal to the upper chamber. Maybe they want to keep circuit traces cool?
Electronics are a lot like automatic transmissions. The cooler the better. Component lifespan and working temperature go hand in hand.
I have not dismounted the OEM fan, but for sure (?) it is sleeve type? I forgot to ask this a dozen posts ago. Ralph Scheidler of Sure Power educated me about forced draft induction and forced air exhaust cooling efficiency decades ago. Screw pushing bore columns of air is a hell of a lot different than relying on 14.7 PSI absurd max theorecticals pushing it. Light a match behind the fan and go Oooooooo.
