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Bill, N4QA/QRP <wb4hio@...> updated the photo album QMX-PLUS-FT8-OKI : QMX-PLUS-FT8-OKI

Bill, N4QA/QRP <wb4hio@...> added the photo album QMX-PLUS-FT8-OKI : QMX-PLUS-FT8-OKI

I just finished playing in the CQ World Wide SSB contest! My setup included the QMX+ (firmware 1_01_003) and a 3-el yagi at 15 metres above ground. The QMX+ performed beautifully. I made 118 contacts on 3 bands. Worked 32 different DXCC Entities in NA, SA, Eu, Asia and Africa. My final claimed score is 29,952. All this with 3 watts or less! I had lots of fun! Thanks Hans! -- 73, Rick VE7TK Website: https://www.ve7tk.ca/

New broken QMX+, need repairhelp in Sweden. Regards Roger SM7RYR Contact: sm7ryr@...

I was just building a microphone for the qmx and then I plugged it into my power supply to test it. I on purpose to turn the voltage down from 13.8 and then turn it on. It worked fine but I needed to turn it off and back on again for it to connect to my computer. I turned it off and then when I tried to turn it back on it was a high-pitched noise for about half a second in the screen backlight turned on and then it turned off and now shows no signs of Life except power draw when I press the button.

Hello, I tested the internal microphone in the menu microphone test. Nice. Now a question: once the beta firmware results in a release, what will be the way to transmit? All controls seem to have already a function and there seems to be nothing left for the PTT function. Jindra

I just finished building a QDX board version 3 with the latest 1.10 firmware installed and have been testing it. I built it for 9v operation and am using a variable bench power supply to test it. I have made a few FT8 QSOs on both 40m and 20m, I am noticing the power starts out at about 4w and slowly drops to about 2w by the end of the FT8 transmission cycle. The voltage from the power supply is a rock solid 9v. The current draw on transmit starts at about 1.02 amps and drops to about .4 - .5 amps by the end of the transmission cycle. Is this normal and if not, what should I be looking at? 73 Doug WB5WRC

Or should I wait to see what's coming out at Dayton that will be even more amazing? But then I won't have time to get it ready for Field Day. Decisions, decisions.

I know it's been a Han's project for many years, with many "interruptions", such as SSB on the QMX+!!! Anyway, I recall that at one time, Han's had the vision/plans for a QMX++ (I forget it's real name), that was to be an upgraded QMX+ with a color display, larger case, etc. Does anyone remember the name of this (hopefully) future radio? At last years' FDIM, when I spoke to Hans about the different radios, I nicknamed them the QMX-lite, QMX-home-edition, and QMX-Pro-edition. I recall he said his current priority was SSB (bravo, Hans!!) and that all of the QMX series radios would use the same firmware, etc. No, I AM NOT COMPLAINING, I am just trying to remember the name of the color display enhanced radio, along with the latest WAG on availability. Thanks, Roy K2RMA

Hello to all, is there a hardware reset for the QMX? THANKS

Hi all, I have an unbuilt 50-watt amp kit and I'm trying to figure out how to best build it. I just completed a 5-band (40-15 meters) homebrew rig (it's not a QMX, but it works!). I'd like to use the amp on multiple bands for this radio (and possibly a QMX). I am thinking of just building the amp for the highest band I need and adding a switchable external low-pass filter. But I had a question: obviously the output of the amp won't be as large on higher bands. However, if I build the amp for 15 meters and transmit on say 40 meters (with a 40 meter external low-pass filter) should I still similar output as I would get if I built the amp for 40 meters, or would there be a significant sacrifice running though the 15 meter filter first? I'm sure some of you have experience trying this out. Thank you! 72, Sam WN5C

Hi all, Next monday, March 31 is the next QCX Challenge, on the regular bands. Times are 1300Z, 1900Z and 0300Z (Tuesday). Time to get on the air with your QCX, QDX or QMX rigs! Use any accepted mode where you can exchange a signal report, your name, rig and power. Note that from now on, this means that also SSB can be used by those that have a QMX/QMX+ with the new firmware :-) See all info here : https://www.qrp-labs.com/party.html Enter your scores at https://3830scores.com/ Join the discord page in the #qcx-qrp-operation channel to post your QRG or exchange other info, or just have a chat with other QRP Labs friends ... https://discord.com/invite/GdZzmhuU8p Also check out the spotting website by Tom,DK3DUA : https://www.hamserver.de/qcxparty.php PS : note that from now on, the QCX WARC Party has moved to the second monday of the month, so the next one is on April 14. 73 es GL, Luc ON7DQ

Hello, I am testing ARIM + ARDOP between QMX+dummy load and TS590+normal antenna. I can hear both signals both ways very well. ARDOP listening to QMX can decode all frames. ARDOP on TS590 cannot receive a single frame sent via QMX. QMX mode is set to DIGI. I think I should rather use USB, right? Jindra

I updated my QMX and in the process I get no sound during practice. It is sending but there is no volume. any ideas as to the issue? Has to be a new setting. In the process of figuring this out I am updating my QMX Menu Reference. Quick Menu Reference to Firmware 1_01_003

Hello! Browsing the QRP-labs website, I was excited to find that Hans has released beta SSB software. I immediately loaded it into my QMX+. After a few false starts, it was making power, using a Baofeng microphone from my UbitxV6. I did have to make an adaptor becuause the tip/Ring wiring is opposite from my other radios. The mic does behave well in the hardware microphone test. I piped the output into my FTDX10 with a bunch of attenuation: a 30dB 500W Bird, then two 20dB inline attenuators, then 18dB inside the '10. It's recognizably SSB. Once I got it attenuated enough so it wasn't overloading the radio, it looked nice & clean on the bandscope. Alas, with 3W output, I probably won't be making many SSB QSO's. What I need is to patch it into my homebrew 1kW linear. It wouldn't drive the linear to full output, but it would make 300W or so, enough to play. To do that, I need the QMX+ to output a PTT signal and also a 4-bit Yaesu band code. I did buy the "dev" kit for the QMX+, it's in my junque somewhere. But - what about the software? Can't output that 4-bit code without software. Hans did promise some sort of BASIC interpreter for the QMX, is there a timeline for that? Can't hack the existing software because it's closed source & encrypted. I suppose I could put another CPU in the box, and patch into the band-choosing lines, but what a waste - there's a perfectly good CPU in there already. Which surely knows what band it's on. - Jerry, KF6VB

Hello my QMX after installing the latest version of the beta software for SSB has become completely deaf on 20 meter band. In transmissions everything is ok, the other band are ok also in reception- (it's the 80/20 meter Qmx). I tried to install the official version 1_00_027 again but nothing changes. What can I try to do? Any idea ? 73 And IW0HK -- Andrea Borgnino IW0HK http://www.mediasuk.org/iw0hk http://www.mediasuk.org/archive

Hi all I hereby officially retire the QSX project http://qrp-labs.com/qsx which was started in 2018 and aimed to provide a low cost, high performance multi-band multi-mode QRP transceiver. QSX was an ambitious project, probably TOO ambitious. I did probably bite off more than I could chew. As a result of publicity around the project it also caused a lot of pressure and stress. But things developed regardless; and it was a happy day when I decided to take a break from it, and put it on the shelf for a while while I continued with other developments. Numerous new kits came about including the QCX 50W PA, then the QCX+, QCX-mini, QDX, QMX and QMX+. Many people noticed and commented that many of these new kits took steps towards my original goals for QSX. I was getting there, step by step. Now with the implementation of SSB and CESSB in QMX+, there is at least a 95% overlap between the planned functionality of QSX and the planned/delivered functionality of QMX+. In many ways QMX+ surpasses the QSX plan in features and performance, and does so at a lower price ($125 compared to my $150 target for QSX, both without enclosure). I am measuring for example, IMD -40 dB PEP two-tone test results in QMX+ on 40m; that compares to -30 dB PEP measured on the 10W Linear module of a QSX, -35 dB PEP for Elecraft K3S (ARRL lab measurement in QST review) and -36 dB PEP for Elecraft KX2 (ARRL lab measurement in QST review). Of course two-tone testing isn't everything but as a single number comparison point, it's not a bad indication. So we'll continue and focus on QMX/QMX+ firmware development. And consign QSX to history, with respect to the ambition, innovation and ongoing development which it inspired, and whose end result is now the QMX-series. 73 Hans G0UPL http://qrp-labs.com https://www.buymeacoffee.com/g0upl

Hi, I've just ordered a QMX+. I want to print the assembly manual out. I'm assuming it'll be a Rev 3 PCB but I'm wondering if I should wait until the kit arrives to be sure and not 'waste' paper and ink? Thanks Mike