Well described. I wonder if the "sil pad's" presence is just for electrical insulation. I've shared some of these photos with an online friend who does electronics repair for a living and he said the thermal grease is a surprise, that the 'thermal pad',his term, is usually sufficient. He said the thermal pad is very easy to tear.
There is no thermal grease in between the pad, and the aluminum heatsink, nor between the aluminum heatsink and the casing, and the aluminum heat sink does not sit completely flat on the case, so I believe thermal grease will vastly help increase heat flow away from mosfet placed in these areas.
But as you say there is no way to easily tell if this will actually keep mosfet cooler. The side of the case with these mosfets did get very very warm when maxxed out passing 37.5 amps. I think a fan blowing over the case itself could be beneficial. More finned heat sink should then be more beneficial too. I hope I still have that inverter case. It will make my power supply much more impressive visually, which of course will make it go faster :)
it was only slightly warm passing 15 amps.
It was cool to the touch passing 6 amps.
I'd like to discuss the 10 turn POT, and my Ohm readings if we may.
872 ohms falls within the +/- 25% spec listed on the Amico 102 trim pot linked to previously, which claims to be a 1000 ohm pot.
This Pot dialed in for max voltage, fully clock wise, read 0 ohms
This Pot dialed in for minimum voltage, fully CCW, read 872 ohms.
How much difference would there be if the pot was removed from circuit board and tested outside it?
I'd like to know the correct value 10 turn wirewound pot was in the mail.
The sooner it is the sooner we get to see macro pics of it installed and get a function report :)
I might need to get a 4 decimal place voltmeter to really Oooh and Ahhh.
