[hpsdr] Debugging Atlas

[Kjell Karlsen]

Hi Neal:

Have you checked the polarity of the tantalium capasitors on Atlas? My  
experience is that they are very good polarity protection devices but  
normaly they explode when driven by wrong polarity voltage, but they may  
survive sometimes.

73, LA2NI Kjell


På Sat, 31 Jan 2009 22:10:57 +0100, skrev Neal Campbell  
<nealk3nc at gmail.com>:

> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi all
>
> I have built what is my 5th Atlas board and I just cannot find what is
> wrong with it. If I do the continuity checks between ground and the
> +/- voltage outlets, it tests just fine. I have Tapr-built boards
> which also test as having no shorts between ground and the various
> feed voltages. Yet if I plug in the Janus card into any Atlas slot and
> apply power, it immediately shorts and blows the internal fuse of the
> power supply. I have tried 2 power supplies so I am sure its not in
> the power supply.
>
> Any guidance on where to look for problems? I have reviewed/resoldered
> everything under my microscope and it all looks proper!
>
> Thanks
>
> Neal Campbell
> Abroham Neal Software
> Programming Services for Windows, OS X and Linux
> www.abrohamnealsoftware.com
> (540) 242 0911
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