[hpsdr] Janus U7 gets very hot

[Joe - AB1DO]

Chuck/Scotty,

thanks for the response. Keeping fingers crossed here...........

73 de Joe - AB1DO

Chuck Hutton wrote:


> ***** High Performance Software Defined Radio Discussion List *****
>
>
> Date: Wed, 30 May 2007 18:09:15 -0700
> From: Scott Cowling <scotty at tonks.com>
> Subject: Re: [hpsdr] Janus U7 gets very hot
> To: hpsdr at hpsdr.org
> Message-ID: <7.0.1.0.2.20070530180857.034bdeb0 at tonks.com>
> Content-Type: text/plain; charset="us-ascii"; format=flowed
>
> Hi Joe,
>
> We noticed this during testing.
>
> A quick check of the data sheet shows that typical power dissipation
> of the AK5394A is over 600mW.
>
> That would, in fact, make it run hot!
>
> A heat sink couldn't hurt, but is probably not necessary.
>
>
> 73,
> Scotty WA2DFI
>
>
>
> At 20:28 2007-05-30 -0400, you wrote:
>>***** High Performance Software Defined Radio Discussion List *****
>>
>>
>>Hi All,
>>
>>I've started using Ozy/Janus with my SDR-1000 and I'm noticing that
>>on Janus U7, the AK5394, gets really hot to the point where it can
>>barely be touched. Is this normal for this chip? Should I consider
>>mounting a heat sink on the chip?
>>
>>73 de Joe - AB1DO
> _________________________________________________________________________
>
> Joe and Scott:
>
> Take a look at this similar concern:
> http://recforums.prosoundweb.com/index.php/t/2962/0/
>
> AKM doesn't tell us the thermal resistance from junction (die) to case so 
> we
> have no way to know for sure whether a heat sink is needed. We'll just 
> have
> to do a dangerous thing and take the word of their marketing manager..
>
>
> Chuck


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