[hpsdr] Ground: Some questions of a newbie

[Ronald Cox]

Alexander,
I have built two systems in cases now and used metal spacers to a  
metal case in both with good results. I have had good results using  
cases with built-in power supplies from Antec. I have noticed that at  
10 MHz an internal signal is present in the case where atlas is  
located next to the computer motherboard. In my last installation, I  
put the atlas board in a separate compartment, in with the power  
supply where the optical drive used to be located. In this location I  
don't see the 10 MHz signal from the Motherboard. No signals from the  
power supply are detected in either case.

Ron, W9KFB
On Feb 11, 2009, at 4:20 AM, Alexander Geckeler wrote:

> ***** High Performance Software Defined Radio Discussion List *****
>
> Dear all!
>
> I'm a happy owner of a HPSDR Reveiver (Atlas, Ozy and Mercury) which  
> I successfully brought to life two days ago with the support of  
> Horst (DL6KBF) who provided me the right version of PowerSDR.
>
> Because I feel a bit uncomfortable to have the Atlas board and the  
> modules on it without any housing on my desk, I will build a case  
> for it. Regarding this small project I came up with some questions  
> re. ground, which I can't answer by myself because I missed the  
> knowledge (To be honest, I'm a newbie).
> Maybe someone of you guys can help me and give me some answers.
> The questions are:
> 1. Is it necessary to mount ground to the Atlas board. If so, how?
> 2. Should Atlas be connected to the case (planned is a metall  
> hounsing) and the case to ground?
> 3. What kind of board spacer is appropriate - metall or plastic - to  
> mount Atlas into the case?
>
> Many thanks in advance for your answers and help.
>
> 73, Alexander
>
> -- 
> _________________________
> Alexander Geckeler (SWL)
> Hamburg
> Germany
>
>
> _______________________________________________
> HPSDR Discussion List
> To post msg: hpsdr at hpsdr.org
> Subscription help: http://lists.hpsdr.org/listinfo.cgi/hpsdr-hpsdr.org
> HPSDR web page: http://hpsdr.org
> Archives: http://lists.hpsdr.org/pipermail/hpsdr-hpsdr.org/


 1234368199.0