[hpsdr] Front End protection

[Jeroen Bastemeijer]

Hi Francis,

It wasn't a god, but a dog-like creature called Ceberus (if my memory 
serves me well).

In my opninion a combination of resistors and diodes (to the power suply 
lines) is the best solution. The resistors will limit the current and 
provide some "soft clipping". By soft-clipping all sorts of distortion 
generated by the receiver are avoided.

Regards, Jeroen PE1RGE

FRANCIS CARCIA wrote:

>***** High Performance Software Defined Radio Discussion List *****
>
>  
>
>
> ------------------------------------------------------------------------
>
> I don't know which Greek God guarded the gate but how are we going to 
> protect this fast A/D from static and lightning transients? Racal used 
> an interesting active limiter ahead of the RA6830 because the older 
> RA6790 had real bad burnout problems with the FETs in the first mixer. 
> I would think we need more than a NE2 across the input.  Frank WA1GFZ
>
>------------------------------------------------------------------------
>
>_______________________________________________
>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/
>

-- 
Ing. Jeroen Bastemeijer

Delft University of Technology
Department of Electrical Engineering
Electronic Instrumentation Laboratory
Mekelweg 4, Room 13.090
2628 CD Delft
The Netherlands

Phone: +31.15.27.86542
Fax: +31.15.27.85755
E-mail: J.Bastemeijer at TUDelft.nl

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/attachments/20070222/51b36a58/attachment-0004.htm>