[hpsdr] Mercury questions

[Jim Sanford]

All:

I am helping a friend get an HPSDR going.  In comparing his Mercury 
board with my two boards, I see that one of mine has a heatsink on U5.  
My other board (purchased from TAPR years ago) and my friend's board do 
not have a heatsink on U-5.

I do not see a reference to a heatsink in the BOM.  Thermal imaging 
predictably shows higher temperatures on the devices without a 
heatsink.  (161F versus 150F or so on the heatsink.)

This was obviously added to my one board somewhere along the way.  Does 
anybody know when/why?

Specifically, should I be looking for heatsinks for the two boards?  If 
so, does anybody have/remember part number and source?

Or is this "nice to have" but not necessary?

Thanks & 73,

Jim

wb4gcs at amsat.org



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