AC30...master volume or VVR, or ???

[bcmatt]

Sweet! That is great! Thank you very much!
It all seems logical and straight-forward.

[Zippy]

You can use the thermal paste between the chassis and the heatsink. The paste is usually used for devices that bolt directly to a heatsink/chassis and doesn't require the insulator. It doesn't hurt to use it with an insulator and I have seen some guys use the paste to hold the insulator onto the mosfet so they can mount both a little easier at the same time.

Good call on the thermal paste. Regarding the insulator: Most materials that act as electrical insulators are also effective thermal barriers. For best heat sinking, avoid the insulator and apply thermal paste to all interfaces.

[UR12]

You can use the thermal paste between the chassis and the heatsink. The paste is usually used for devices that bolt directly to a heatsink/chassis and doesn't require the insulator. It doesn't hurt to use it with an insulator and I have seen some guys use the paste to hold the insulator onto the mosfet so they can mount both a little easier at the same time.

Good call on the thermal paste. Regarding the insulator: Most materials that act as electrical insulators are also effective thermal barriers. For best heat sinking, avoid the insulator and apply thermal paste to all interfaces.

Unfortunatly you can't bolt the mosfet directly to the chassis in this case and you absolutly need the insulator or you will short your Drain connection (HV) to ground and that would not be good. There are mosfets out there that are made to be bolted directly to the chassis but they are about $30 each. In this case the insulators isolate the Drain from ground but they have good thermal properties also

[dehughes]

Thank you, Dana. Your help and work is greatly appreciated!