[Amps] Force cooled heatsink aerodynamics

[Bill Turner]

ORIGINAL MESSAGE:          (may be snipped)

On 2/15/2014 9:04 AM, Alan Ibbetson wrote:
>
> I am planning on using TO-220 high voltage switching FETs which are 
> primarily targeted at SMPS use. The drain is connected to the mounting 
> tab. I did look into using a more conventional style of heatsink with 
> an Alumina plate as a thermally conductive but electrically insulating 
> interface between a copper heat spreader and the main heatsink, but 
> the US supplier let me down on delivery and in any case was wildly 
> expensive for overseas customers. This approach allows me to bolt the 
> FETs directly to two heatsinks (in a push-pull circuit) and float the 
> whole assemblies at drain voltage. I don't see this as being much 
> different from applying an external anode valve.
>
> At the danger of stating the obvious, I do plan on enclosing 
> everything inside a case for safety!
>
> 73, Alan G3XAQ
> ________________

REPLY:

Sounds interesting, Alan. Please keep us posted on your progress.

73, Bill W6WRT