[hpsdr] Fwd: Re: Mercury questions

[Kjell Karlsen]

------- Videresendt melding -------
Fra: "Kjell Karlsen" <la2ni at online.no>
Til: wb4gcs at amsat.org
Cc:
Emne: Re: [hpsdr] Mercury questions
Dato: Sat, 07 Jan 2017 17:58:11 +0100

Hi Jim.

The heat sink is probably placed on the ADC.

I bought a lot of them on e-bay some years ago. They are made for use on
RAM chips in a PC, they I got have PN: RHS-03 but anyone works. 12x13 mm
or so.

73, Kjell




På Sat, 07 Jan 2017 16:16:25 +0100, skrev Jim Sanford <wb4gcs at wb4gcs.org>:

> ***** High Performance Software Defined Radio Discussion List *****
>
> 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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