<div dir="ltr">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"). </div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Nov 11, 2015 at 2:50 PM, Terry N4TLF <span dir="ltr"><<a href="mailto:n4tlf@wb4jfi.com" target="_blank">n4tlf@wb4jfi.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<div>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!</div>
<div> </div>
<div>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!</div>
<div>73, Terry, N4TLF</div>
<div> </div>
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<div><b>From:</b> <a title="dcmk1mr2@gmail.com" href="mailto:dcmk1mr2@gmail.com" target="_blank">Martin</a> </div>
<div><b>Sent:</b> Wednesday, November 11, 2015 1:35 PM</div>
<div><b>To:</b> <a title="tacos@amrad.org" href="mailto:tacos@amrad.org" target="_blank">Tacos</a>
</div>
<div><b>Subject:</b> Red Pitaya SDR update</div></div></div>
<div> </div></div>
<div style="FONT-SIZE:small;TEXT-DECORATION:none;FONT-FAMILY:"Calibri";FONT-WEIGHT:normal;COLOR:#000000;FONT-STYLE:normal;DISPLAY:inline"><div><div class="h5">
<div dir="ltr">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.
<div> </div>
<div>There's a <a href="http://pavel-demin.github.io/red-pitaya-notes/sdr-transceiver-hpsdr/" target="_blank">dual receiver single transmitter</a> 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.</div>
<div> </div>
<div>
<div>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.</div>
<div> </div>
<div>
<div>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. </div>
<div> </div>
<div>Terry N4TLF has done testing on the RP LF performance and found it too
noisy to be useful but perhaps there's a fix. </div>
<div> </div>
<div>The <a href="http://store.redpitaya.com/red-pitaya-board.html" target="_blank">Red Pitaya</a> is now $238 so an affordable, complete HF SDR
transceiver should be possible. <br></div>
<div> </div>
<div>This could be a great project for the club that hopefully attracts interest
and new members. </div>
<div> </div>
<div>So - anyone else in? What do you think?</div>
<div> </div>
<div>73 Martin W6MRR.<br></div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
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<div> </div></div></div></div>
</div></div><p>
</p><hr><span class="">
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