[linrad] Re: softrock40

[Josh Logan <josh-linrad@xxxxxxxxxxxx>]

I had a lot of fun building this kit.  So far it looks like it is working,
but I need to use it some more.  I still don't have the right connector to
connect this to my delta44 in IQ configuration.  Need to find a streo 1/8"
to L/R 1/4" cable...  I used a mono connection and linrad saw lots of
signals.  I also connected it to my XP machine and ran the suggested
program, that also gave good signals.

Here is a link to some pictures during the building process.

http://www.flickr.com/photos/joshtlogan/sets/1230318/

This was my first surface mount soldering project.  That actually was a
lot easier then I expected.

I also connected up a mixer and a PTS 160 so I could tune to other
frequences.  This also worked well.


73, KD7HGL


On Thu, 15 Sep 2005, Bill Tracey wrote:

> As delivered the softrock board will work on 40 and 30 meters.  You should
> be able to get it on 20 if you change the input bandpass filter, can also
> probably get it on 17 meters.   15 meters is on the edge  -- the LT1719
> comparator  claims to work to 62.5 MHz, and the HC flipflops claim 70 MHz
> typical.
>
> Not sure I understand on widening the bandwidth for a Delta 44, I've used
> mine on a 44 and it works find.  The width of the QSD on the board is set
> to match a 48 khz sampling rate.  To do 96 khz sampling you'd probably have
> to change the QSD caps to widen it out a bit.
>
> Now if I could find some time and once and for all get Linrad running on
> one of my boxes I'd try it out with the SoftRock.
>
> Regards,
>
> Bill (kd5tfd)
>
> At 05:31 PM 9/14/2005, Josh Logan wrote:
>
> >Has anyone seen the design or tries the softrock40 with linrad?
> >http://www.amqrp.org/kits/softrock40/index.html
> >
> >
> >Does anyone know how frequency agile these chips are if you supply your
> >own frequency source?
> >
> >Just curious if this might be a good basic starting point for hardware to
> >use with Linrad.
> >
> >Also any suggestions on if the bandwidth could be increased for use with a
> >Delta 44.
> >
> >73, KD7HGL
> >
> >                                                 Later, JOSH
>
>
>
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