Heat Sinks for WB was RE: WBO2 testing

[Nic van der Walt]

>It is starting to appear that I have significantly 
>underestimated the amount of heat sink required for 

You could try to mount the resistor and the power transistor
to the aluminium case, instead of on the PCB. The box
can be a great heatsink.

Use three wires to the PCB, and a silicon isolation washer
and some heatsink compound between the case and the tranny's
tab.

Use a panel mount power resistor.

Take a look at:

Resistors:
http://info.digikey.com/T013/V5/551.pdf (89 type)

Heat sink pads:
http://info.digikey.com/T013/V5/347.pdf

Heat sink compound:
http://info.digikey.com/T013/V5/342.pdf

N.

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