cantenna' s web site' s web site has the answer.

 

Thanks Bay Wolf.   That will work!   Can I assume the software that comes with this product will "disable"
the internal antenna, or does that not matter at all?   Thanks again for the tip.

I suspect that you will have to "disable" it manually.  But that is fairly easy to do.

Just go to Start > control panel > Network connections

 

Then just right click on the internal wireless connection and select disable.