[hpsdr] hardware question ( Mercury HPSDR)

[Kjell Karlsen]

Hi Gedas.

Have you run the calibration from PowerSDR Setup?

Just a stupid suggestion.......

73, Kjell



På Sat, 17 Jul 2010 07:53:15 +0200, skrev Gediminas Kasparaitis  
<kaunas69 at gmail.com>:

> ***** High Performance Software Defined Radio Discussion List *****
>
> Hello all,
>
> I need more help ;-)
>
> I'm interested in how PowerSDR screen looks on others computers with
> with antenna disconnected.
>
> Here is my test ( demonstration):
>
> http://www.youtube.com/watch?v=zkoTY3CESJs
>
>
> I did put on heatsinks on A/D, they are nice, but I believe that noise
> increased after that ( I played in the park for few hours, listened to
> VP5/W5CW pileup)...,
> later  I removed them, noise is the same (elevated)...not going down.
>
> Heatsinks cool chip efectively....
>
> . I don't know, I don't want blame power supply,
> before I also tried with ATX power supply....I guess that LPU is OK,
> I would rather suspect AD... or something on the Mercury board ( preamp?)
>
>
> Otherwise it works, but it seems to me somewhat too noisy ?
> I'm in Columbus OH, is here anyone who would like to compare Mercury  
> boards?
>
> 73, Gedas, nx2px
> ...that A/D is expensive...cheapest I saw at newark.com...something over  
> 130
> USD for
> -40 - 85 C version, don't want to do expensive "science" yet.
>
>
>
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