<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue-Light, Helvetica Neue Light, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:14px"><div dir="ltr" id="yui_3_16_0_ym19_1_1477652385676_39217"><span id="yui_3_16_0_ym19_1_1477652385676_39216">wow, Steve, super job!</span></div><div dir="ltr"><span><br></span></div><div class="qtdSeparateBR" id="yui_3_16_0_ym19_1_1477652385676_39218"><br><br></div><div class="yahoo_quoted" id="yui_3_16_0_ym19_1_1477652385676_39222" style="display: block;"> <div style="font-family: HelveticaNeue-Light, Helvetica Neue Light, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 14px;" id="yui_3_16_0_ym19_1_1477652385676_39221"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_ym19_1_1477652385676_39220"> <div dir="ltr" id="yui_3_16_0_ym19_1_1477652385676_39219"> <font size="2" face="Arial" id="yui_3_16_0_ym19_1_1477652385676_39225"> <hr size="1"> <b id="yui_3_16_0_ym19_1_1477652385676_39224"><span style="font-weight:bold;" id="yui_3_16_0_ym19_1_1477652385676_39223">From:</span></b> Steven Wilson <wevets@gmail.com><br> <b><span style="font-weight: bold;">To:</span></b> hpsdr@lists.openhpsdr.org <br> <b><span style="font-weight: bold;">Sent:</span></b> Friday, October 28, 2016 6:08 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> [hpsdr] RP board design<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_ym19_1_1477652385676_39226"><br><div id="yiv6912126245"><div dir="ltr" id="yui_3_16_0_ym19_1_1477652385676_39231"><div id="yui_3_16_0_ym19_1_1477652385676_39230"><div id="yui_3_16_0_ym19_1_1477652385676_39229"><div id="yui_3_16_0_ym19_1_1477652385676_39228"><div id="yui_3_16_0_ym19_1_1477652385676_39227">Helmut, and Terry,<br><br></div>I've been working on a Homebrew RP transceiver design for most of this year. I'm on the 4th iteration of the board.<br><br></div>Today I also took my first stab at creating a github repository. You'll find the Kicad schematics and gerbers for the board there:<br><br><a rel="nofollow" target="_blank" href="https://github.com/ka6s/rp_adapter" id="yui_3_16_0_ym19_1_1477652385676_39232">https://github.com/ka6s/rp_adapter</a><br><br></div>The board is based heavily on work done by OpenHPSDR. I've incorporated the LPU, T/R relay and 1W PA design from Penelope into the board. (Note - any layout issues etc are mine as these are complete re-layouts). The board has an 18db-ish LNA incorporated into it along with control for an external RX/TX filter. It is BUILT to match up with the cabling required by the EB104.ru HERMES RX filter, and their 300W LPF board. The boards are about $100ish US each -so the price is right. <br></div><div><br></div><div>I'm using a Raspberry Pi 3 + LCD to provide a GUI control of the unit running John Melton, G0ORX's PiHPSDR code. Here is a video of the basic unit if you want to see what I've put together.<br><br><a rel="nofollow" target="_blank" href="https://www.facebook.com/dontwantemailhere/videos/vb.1345107848/10210568670396717/?type=2&theater">https://www.facebook.com/dontwantemailhere/videos/vb.1345107848/10210568670396717/?type=2&theater</a><br><br></div><div>I have been having a BLAST working on this. It has been frustrating and rewarding at the same time ;-) <br><br></div><div>One thing I'll mention that you can't see in the video - there is a 9:1 UnUn between the LNA and the RP. This is a MUST. It is a practical solution to the RPs high input impedance. <br><br></div><div>Hope you find it interesting.<br><br></div><div>73 de Steve KA6S<br><br></div><div>(and many many many thanks to Phil, John Melton, and all the others that have put the OpenHPSDR systems together!)<br></div></div></div><br>***** High Performance Software Defined Radio Discussion List *****<br><br><br>_______________________________________________<br>HPSDR Discussion List<br>To post msg: <a ymailto="mailto:hpsdr@openhpsdr.org" href="mailto:hpsdr@openhpsdr.org">hpsdr@openhpsdr.org</a><br>Subscription help: <a href="http://lists.openhpsdr.org/listinfo.cgi/hpsdr-openhpsdr.org" target="_blank">http://lists.openhpsdr.org/listinfo.cgi/hpsdr-openhpsdr.org</a><br>HPSDR web page: <a href="http://openhpsdr.org/" target="_blank">http://openhpsdr.org</a><br>Archives: <a href="http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/" target="_blank">http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/</a><br><br></div> </div> </div> </div></div></body></html>