> Holes under the resistors may actually increase the temperature - a
> closed box has little air circulation and air is a better thermal
> insulator than the FR4 substrate.
>
> dwayne

Yes, if you have on both sides of the board under the resistors you probably 
would be far better to use it as a "mini-heatsink" for the resistor. A 
couple of vias between sides will help the conduction nicely.

-- Bob Ammerman
RAm Systems

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