<div dir="ltr">Think I'll buy one! I wonder if it can do CW with any of the apps?<div><br clear="all"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div>73 Jim K1IR<br></div></div></div></div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, May 1, 2022 at 3:26 PM William Smith <<a href="mailto:w_smith@compusmiths.com">w_smith@compusmiths.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div style="overflow-wrap: break-word;"><div>Some of you may remember the QDX 4-band 5W transceiver kit from QRP-Labs that sold out in minutes the last couple of times it became available. I bought one of the V1 boards and was very impressed, until a firmware error blew it up and then I was very sad. Ran FT8 and JS8Call flawlessly while it lasted. Yes, the firmware issues were fixed months ago.</div><div><br></div><div>They got anough parts for a couple of thousand of them, and they've just gone on sale, see below:</div><div><br></div><div>73, Willie N1JBJ</div><div><div><br></div></div><div><div style="margin:0px"><span style="font-family:-webkit-system-font,"Helvetica Neue",Helvetica,sans-serif;color:rgb(0,0,0)"><b>From: </b></span><span style="font-family:-webkit-system-font,"Helvetica Neue",Helvetica,sans-serif">"Hans Summers" <<a href="mailto:hans.summers@gmail.com" target="_blank">hans.summers@gmail.com</a>><br></span></div><div style="margin:0px"><span style="font-family:-webkit-system-font,"Helvetica Neue",Helvetica,sans-serif;color:rgb(0,0,0)"><b>Subject: </b></span><span style="font-family:-webkit-system-font,"Helvetica Neue",Helvetica,sans-serif"><b>[JS8Call] QRP Labs QDX 4-band 5W digi-modes transceiver kit is back in stock</b><br></span></div><div style="margin:0px"><span style="font-family:-webkit-system-font,"Helvetica Neue",Helvetica,sans-serif;color:rgb(0,0,0)"><b>Date: </b></span><span style="font-family:-webkit-system-font,"Helvetica Neue",Helvetica,sans-serif">May 1, 2022 at 2:57:09 PM EDT<br></span></div><div style="margin:0px"><span style="font-family:-webkit-system-font,"Helvetica Neue",Helvetica,sans-serif;color:rgb(0,0,0)"><b>To: </b></span><span style="font-family:-webkit-system-font,"Helvetica Neue",Helvetica,sans-serif"><a href="mailto:js8call@groups.io" target="_blank">js8call@groups.io</a><br></span></div><div style="margin:0px"><span style="font-family:-webkit-system-font,"Helvetica Neue",Helvetica,sans-serif;color:rgb(0,0,0)"><b>Reply-To: </b></span><span style="font-family:-webkit-system-font,"Helvetica Neue",Helvetica,sans-serif"><a href="mailto:js8call@groups.io" target="_blank">js8call@groups.io</a><br></span></div><br><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div><br></div></div></div></div><div class="gmail_quote"><div dir="ltr"><div class="gmail_quote"><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div>Hi all<br></div></div></div></div><div class="gmail_quote"><div dir="ltr"><div class="gmail_quote"><div dir="ltr"><div><br></div><div>After 5 months of searching for components, substitute components, and re-designing some sections to suit the substitute components - the QDX kit is now back in stock again, price $66, see <a href="http://shop.qrp-labs.com/qdx" target="_blank">http://shop.qrp-labs.com/qdx</a> </div><div><br></div><div>A key feature of QDX is very high performance - both on receive due to the 24-bit ADC and carefully crafted SDR; and on transmit due to the unique combination of built-in USB soundcard and measuring the audio tone from the PC software, then commanding the TCXO-locked PLL to that frequency - resulting in accurate transmissions with zero unwanted sideband or residual carrier or splatter, always. CAT control for easy use with WSJT-X etc. </div><div><br></div><div>The Rev 3 PCB design changes actually improve the noise floor by 6dB (see attached; test condx, -60dBm calibrated signal source on 7MHz; gain adjusted so it appears as -60dB FS when recorded on the PC in Audacity; Audacity's Plot Spectrum in Hanning window mode and 8192 points with a 48ksps recording). </div><div><br></div><div>The Rev 3 PCB batch design changes also add a PTT output connector (3.5mm jack) with active-low grounded, as well as +5V active output signals (configurable). There are new pads on the PCB for ground control outputs and </div><div><br></div><div>Features:</div><div><ul><li>Four bands 80, 40, 30 and 20m</li><li>Also works well on 60m, see John AE5X measurements <a href="https://ae5x.blogspot.com/2021/11/spectrum-analysis-qdx-on-60m.html" target="_blank">https://ae5x.blogspot.com/2021/11/spectrum-analysis-qdx-on-60m.html</a> </li><li>5W output at 9V supply (can be built for 4-5W at 12-13V supply)</li><li>Single signal transmission (zero unwanted sideband, zero residual carrier, zero intermodulation distortion)</li><li>Solid-state band switching and transmit/receive switching under CAT control</li><li>High performance embedded SDR SSB receiver with 60-70dB of unwanted sideband cancellation</li><li>Built-in 24-bit 48ksps USB sound card</li><li>Built-in USB Virtual COM Serial port for CAT control</li><li>Si5351A Synthesized VFO with 25MHz TCXO as standard</li><li>Easy to build single-board design, Professional quality double-sided, through-hole plated, silk-screen printed PCBs</li><li>All SMD components factory assembled</li><li>Connectors: 2.1mm power barrel connector, USB B (for audio and CAT control), BNC RF input/output</li><li>Built-in test signal generator and testing tools</li><li>Receive current 100mA, Transmit current 1.0-1.1A for 5W output with 9V supply (around 0.7A for 5W with 13V supply).</li><li>I-Q output mode if you wish to use a PC SDR program for demodulation rather than the internal SDR</li><li>PTT output connector (active grounded, or active high +5V)</li><li>QFU firmware update for lifetime free firmware udpates, easy installation on any PC without drivers, software or hardware e.g. programmer</li><li>Optional aluminium extruded cut/drilled/laser-etched black anodized enclosure (88.6 x 63 x 25 mm)</li></ul><div><div dir="ltr"><div dir="ltr"><div>73 Hans G0UPL<br><a href="http://qrp-labs.com/" target="_blank">http://qrp-labs.com</a></div><div><a href="https://www.buymeacoffee.com/g0upl" target="_blank">https://www.buymeacoffee.com/g0upl</a><br></div></div></div></div></div></div>
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