Byron A Jeff wrote:

>On Tue, Aug 28, 2001 at 08:22:27AM -0500, Jim wrote:
>
>>Can you somehow couple this heat-load to the
>>metal mower deck? (If indeed the mower deck is
>>made of metal.)
>>
>
>It's not. Believe it or not it's a $5 round particleboard tabletop.
>
>But to beg the question. Since historically heatsink tabs are connected to
>one or the other of the transistor pins, how does one electrically isolate
>yet thermally couple. I know that the mica washers are supposed to work, but
>do they really?
>
Mica is the insulator, heat grease is the thermal conductor.
The FAR better solution is a sil-pad which does both.

>
>BAJ
>
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