[hpsdr] Hot parts

[k5nwa]

At 09:01 AM 5/31/2007, FRANCIS CARCIA wrote:
>***** High Performance Software Defined Radio Discussion List *****
>
>
>Hi All,
>I was just looking at the A/D pc board layout. At work we usuall put 
>a blob ot thermal epoxy under hot parts to sink heat to a thermal 
>plane on the surface of the pc board. Usually the part is mounted 
>over a small hole so the epoxy can be injected under the part die.
>You guys building your own boards may consider a thermal transfer 
>pad under the part to cool it down a bit.
>The part is rated to work at 70 degree C ambient but hot parts die young.
>I think I will glue a hunk of copper to the top of my part. frank

I agree that part is too expensive and hard to get, and a heat sink 
is cheap. 10 degrees C can make a world of difference in terms of 
reliability. It's cheap insurance.


Cecil
KD5NWA
www.softrockradio.org  www.qrpradio.com  www.hpsdr.com

"Blessed are the cracked, for they shall let in the light." 


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