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M0FYA Andy · 11th May 2019, 4:34 pm

The problem revolves around using one of these modules. A pal of mine has been experimenting, and blown his up twice! I've bought one, but not put power on it yet as I'm still awaiting delivery of a heatsink.
He's on the forum, so hopefully will join in.
Our application is a bit unusual, rather than audio use we want to drive it with a 1600Hz sinewave to produce power to operate vintage radar equipment.
He reports very hot transistors, with the heatsink remaining cool. After blowing the first set, he discarded the aluminium angle (seen in the picture) and mounted the eight transistors directly on his big heatsink with insulating pads, but no improvement.

Andy

11th May 2019, 4:34 pm	#5
M0FYA Andy Nonode Join Date: May 2007 Location: Preston, Lancashire, UK. Posts: 2,511	Re: Power MOSFETs The problem revolves around using one of these modules. A pal of mine has been experimenting, and blown his up twice! I've bought one, but not put power on it yet as I'm still awaiting delivery of a heatsink. He's on the forum, so hopefully will join in. Our application is a bit unusual, rather than audio use we want to drive it with a 1600Hz sinewave to produce power to operate vintage radar equipment. He reports very hot transistors, with the heatsink remaining cool. After blowing the first set, he discarded the aluminium angle (seen in the picture) and mounted the eight transistors directly on his big heatsink with insulating pads, but no improvement. Andy Attached Thumbnails