Red Pitaya SDR update

[Jeff Scaparra]

Has anyone evaluated the clock on the RP or used it for JT65? Is it good
enough? Is there a way to provide a 10MHz reference that is common on some
other radios? I always wanted a good reason to build a rubidium clock
source. :) I do believe the Red Pitaya will be a better radio. 14 bit ADCs
and Direct Sampling should be able to have better dynamic range and less
noise. Some shielding will be needed for the Red Pitaya as I get much
better results with a metal cover over it (probably just picking up noise
in my "shack").

On Wed, Nov 11, 2015 at 2:50 PM, Terry N4TLF <n4tlf at wb4jfi.com> wrote:

> I am definitely interested Martin.  After I straighten out a few things, I
> can do both the LF and RP.  Right now, I have so many different versions of
> PowerSDR and Quisk on so many computers, it’s hard to keep track!
>
> I am glad that you are taking charge of this!  The Red Pitaya is
> definitely a wonderful SDR platform.  I wish the HPSDR guys would get more
> interested in it, as I think the RP platform would be better than the
> present Hermes Lite.  Of course, the RP costs a little more, but look at
> what the hardware can do!
> 73, Terry, N4TLF
>
>
> *From:* Martin <dcmk1mr2 at gmail.com>
> *Sent:* Wednesday, November 11, 2015 1:35 PM
> *To:* Tacos <tacos at amrad.org>
> *Subject:* Red Pitaya SDR update
>
> Thanks to Pavel Demin, the Red Pitaya now has a couple of SD card images
> to support a wide array of interesting and useful software.
>
> There's a dual receiver single transmitter
> <http://pavel-demin.github.io/red-pitaya-notes/sdr-transceiver-hpsdr/>
> configuration that acts like a HPSDR network interface with dual receivers
> and a transmitter.  This opens up the possibility of using PowerSDR, Quisk,
> an Android app or other software.  It seems like diversity reception works
> in PowerSDR.
>
> I'd like help design and build the rest of the stuff it takes to turn the
> RP into a robust, portable transceiver.  I've never done this before and
> hope there's others on this list who would be interested in joining me.  We
> have some great resources in the club although I know everyone is time
> constrained.  I'm willing to commit significant time and effort to the
> project.
>
> I realize there's time sensitive work going on in the AMRAD Low Frequency
> world. That said, I'd like to propose this as a AMRAD project to follow on
> the Charleston receiver as time permits.  As most of the digital heavy
> lifting has been done it's mostly a matter of building the analog
> transmit/receive chain and ancillary stuff.
>
> Terry N4TLF has done testing on the RP LF performance and found it too
> noisy to be useful but perhaps there's a fix.
>
> The Red Pitaya <http://store.redpitaya.com/red-pitaya-board.html> is now
> $238 so an affordable, complete HF SDR transceiver should be possible.
>
> This could be a great project for the club that hopefully attracts
> interest and new members.
>
> So - anyone else in?  What do you think?
>
> 73 Martin W6MRR.
>
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