<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div class="">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 class=""><br class=""></div><div class="">They got anough parts for a couple of thousand of them, and they've just gone on sale, see below:</div><div class=""><br class=""></div><div class="">73, Willie N1JBJ</div><div class=""><div><br class=""></div></div><div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;" class=""><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif; color:rgba(0, 0, 0, 1.0);" class=""><b class="">From: </b></span><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif;" class="">"Hans Summers" <<a href="mailto:hans.summers@gmail.com" class="">hans.summers@gmail.com</a>><br class=""></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;" class=""><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif; color:rgba(0, 0, 0, 1.0);" class=""><b class="">Subject: </b></span><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif;" class=""><b class="">[JS8Call] QRP Labs QDX 4-band 5W digi-modes transceiver kit is back in stock</b><br class=""></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;" class=""><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif; color:rgba(0, 0, 0, 1.0);" class=""><b class="">Date: </b></span><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif;" class="">May 1, 2022 at 2:57:09 PM EDT<br class=""></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;" class=""><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif; color:rgba(0, 0, 0, 1.0);" class=""><b class="">To: </b></span><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif;" class=""><a href="mailto:js8call@groups.io" class="">js8call@groups.io</a><br class=""></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;" class=""><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif; color:rgba(0, 0, 0, 1.0);" class=""><b class="">Reply-To: </b></span><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif;" class=""><a href="mailto:js8call@groups.io" class="">js8call@groups.io</a><br class=""></span></div><br class=""><div class=""><div dir="ltr" class=""><div class=""><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr" class=""><div class=""><br class=""></div></div></div></div><div class="gmail_quote"><div dir="ltr" class=""><div class="gmail_quote"><div dir="ltr" class=""><div class=""><div dir="ltr" data-smartmail="gmail_signature" class=""><div dir="ltr" class=""><div class="">Hi all<br class=""></div></div></div></div><div class="gmail_quote"><div dir="ltr" class=""><div class="gmail_quote"><div dir="ltr" class=""><div class=""><br class=""></div><div class="">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" class="">http://shop.qrp-labs.com/qdx</a> </div><div class=""><br class=""></div><div class="">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 class=""><br class=""></div><div class="">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 class=""><br class=""></div><div class="">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 class=""><br class=""></div><div class="">Features:</div><div class=""><ul class=""><li class="">Four bands 80, 40, 30 and 20m</li><li class="">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" class="">https://ae5x.blogspot.com/2021/11/spectrum-analysis-qdx-on-60m.html</a> </li><li class="">5W output at 9V supply (can be built for 4-5W at 12-13V supply)</li><li class="">Single signal transmission (zero unwanted sideband, zero residual carrier, zero intermodulation distortion)</li><li class="">Solid-state band switching and transmit/receive switching under CAT control</li><li class="">High performance embedded SDR SSB receiver with 60-70dB of unwanted sideband cancellation</li><li class="">Built-in 24-bit 48ksps USB sound card</li><li class="">Built-in USB Virtual COM Serial port for CAT control</li><li class="">Si5351A Synthesized VFO with 25MHz TCXO as standard</li><li class="">Easy to build single-board design, Professional quality double-sided, through-hole plated, silk-screen printed PCBs</li><li class="">All SMD components factory assembled</li><li class="">Connectors: 2.1mm power barrel connector, USB B (for audio and CAT control), BNC RF input/output</li><li class="">Built-in test signal generator and testing tools</li><li class="">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 class="">I-Q output mode if you wish to use a PC SDR program for demodulation rather than the internal SDR</li><li class="">PTT output connector (active grounded, or active high +5V)</li><li class="">QFU firmware update for lifetime free firmware udpates, easy installation on any PC without drivers, software or hardware e.g. programmer</li><li class="">Optional aluminium extruded cut/drilled/laser-etched black anodized enclosure (88.6 x 63 x 25 mm)</li></ul><div class=""><div dir="ltr" data-smartmail="gmail_signature" class=""><div dir="ltr" class=""><div class="">73 Hans G0UPL<br class=""><a href="http://qrp-labs.com/" target="_blank" class="">http://qrp-labs.com</a></div><div class=""><a href="https://www.buymeacoffee.com/g0upl" target="_blank" class="">https://www.buymeacoffee.com/g0upl</a><br class=""></div></div></div></div></div></div>
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