[hpsdr] Fwd: Re: Mercury questions

[Jim Sanford]

Thanks to all who responded -- great help as usual!

73,

Jim

wb4gcs at amsat.org



On 1/7/2017 3:08 PM, Terry Fox wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> Also look for heat sink kits for the Raspberry Pi.  They often come in 
> sets of three.
> 73, Terry, N4TLF
>
>
> -----Original Message----- From: Kjell Karlsen
> Sent: Saturday, January 07, 2017 1:16 PM
> To: hpsdr at lists.openhpsdr.org
> Subject: [hpsdr] Fwd: Re: Mercury questions
>
> ***** High Performance Software Defined Radio Discussion List *****
>
>
>
> ------- 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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