So does anyone have a photo of what this amplifier used originally on the power supply mosfets.
This amplifier had thermal spreader pads on the power supply mosfets.
And the tan silicone tape on the outputs but the blue sticky type tape still stuck to the backs of the transistors and the new tape, none of the outputs were seated properly.
Im just wondering if these pads are supposed to be on this amplifier?
This amplifier had thermal spreader pads on the power supply mosfets.
And the tan silicone tape on the outputs but the blue sticky type tape still stuck to the backs of the transistors and the new tape, none of the outputs were seated properly.
Im just wondering if these pads are supposed to be on this amplifier?
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I typically find those with mica insulators behind the fets and on top of the heat spreader. Without the mica insulators ive had voltage leak through which caused noise/voltage on the heatsink.
If there is actual DC voltage being passed to the heatsink, the problem is much different than noise. If it's just noise, the shunt components from ground to the heatsink may need to be replaced/checked, possibly upgraded.
I don't think i have dc passing through or any noise, but if that is an issue. Wouldn't the mica insulators be better all by themselves?
He confirmed that the heat spreaders are common.
I was responding to him about the noise.
Adding mica to the stack would make things worse. The heat spreaders generally only make the transfer of heat better when they're soldered to the transistors or when the heatsink is rough.
I was responding to him about the noise.
Adding mica to the stack would make things worse. The heat spreaders generally only make the transfer of heat better when they're soldered to the transistors or when the heatsink is rough.
But i test voltage from main gound to the heatsink the 12.8v is there. What are the components that would need to be updated?
Or should get something like ceramic pads so i know it will not pass the voltage?
Or should get something like ceramic pads so i know it will not pass the voltage?
They have been removed. Silapads are now installed. Its idle current went from 15+amps to the 4.7amps.