[hpsdr] Anyone with a good memory?

[AA8K73 GMail]

Hmmm.  I found this in my archive about
replacing the -15 volt DC1, but the link
to the KB seems to be obsolete.


-------------

"Interesting Noise" 2007


This is a well known artifact and been discussed on the 
reflector.  It is noise from the DC-DC converter in the radio.

Here is a Reflector archive search on the topic
http://www.mail-archive.com/search?l=flexradio%40flex-radio.biz&q=dc-dc


Here is a KB articles that address how to clean up DC-DC 
converter noise.

http://kb.flex-radio.com/article.aspx?id=10276


-Tim


Chris Day wrote:
> ***** High Performance Software Defined Radio Discussion List *****
> 
> 
> 
> ------------------------------------------------------------------------
> 
> Long ago in SDR time, i.e., a couple of years back, there was an article 
> somewhere about substituting an ultra low noise +/- 15V power supply for 
> the switching unit in the SDR-1000, with the intent of lowering the 
> noise in the quadrature output op amps. I now have the time, SDR-1000 
> and ultra low noise supply to do the job, but haven't relocated the 
> article yet. Anybody have a pointer? Thanks so much.
>  
>  
> Chris Day
> AE6VK
>  

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