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Hi all I updated the SSB beta testing webpage of the brave, here: https://qrp-labs.com/qmxp/ssbbeta.html and released firmware version 1_01_003 to it. These are the changes: Bug fix: Initial value for noise gate samples was 100 (should be max 99) - makes no real difference but it needed to be fixed Added TX indication underlining the A character when transmitting from USB sound card in SSB mode. Note that the two possible states for this indication are a single dot (indicating PTT has been applied and now the radio is in TX mode) and the solid bar (indicating audio is being received from the PC and transmitted). There is no double-dot like there is in Digi mode indicating insufficient volume, because in SSB mode the radio transmits whatever you give it, even if the volume is low. Bug fix: CAT command TQ1; did not cause transmit when in SSB mode. Now TQ1; and TQ0; work properly in SSB mode. Bug fix: Prevent button presses from accidentally activating VOX, which was happening due to sound picked up from the internal (cancellation reference channel) microphone when you pressed buttons right next to it, and that prevented band change because the second click of the double click was ignored because by then the radio was in transmit mode. All fixed! Now you can click buttons however you like and when button clicks are done, VOX is temporarily disabled until your button pushing frenzy is over. Power meter now reads Peak Envelope Power (PEP) when in SSB mode. Previously it was just reading a sampled value (NOT an average); so if the power meter was updated 10x a second, the updates would just randomly pick a value from the SSB amplitude envelope, which was most unlikely to be its peak value. Bug fixL Calibration hung at DAC 1300 when run on LCD. Now the calibration completes properly when run from the LCD. Many thanks for all the feedback so far, SSB in QMX is getting better and better! 73 Hans G0UPL http://qrp-labs.com https://www.buymeacoffee.com/g0upl

QMX+, Rev1 board, 1-00-027 Program I checked the advanced section and all 3 items are set to Enable. I still have a horrible Clunk when keying the QMX+. No clunk when not in transmit mode. So I think its when the PA gets switched on?? Please advise!

I recently built the WA3TFS linear amplifier featured in the March QST. The build went very well and with my old MFJ 20M QRP CW radio, 3W in gives 20W out with a peak 4A draw. So, I tried to interface my QMX+ to it and was surprised to see the QMX+ stop transmitting after the first dit. It would recover after a time and would transmit fine by itself or through the amp but it didn’t like it all when I activated the amp. The firmware hasn’t been upgraded in awhile so I’m not sure if this has already been addressed. I’m not sure the RF detection is maybe not fast enough ?? Any ideas appreciated. 73, Jamie WB4YDL

Sorry for all the questions, I thought I had everything working, but now when I open the measurements screen and press the button, nothing happens. It will do an SWR scan with the Serial interface but not just show when you press tune.

I have FW 1_01_03 FW loaded on my QMX+ but am seeing problems with seeing any GPS plots when i have logged into Putty and checking the GPS Viewer. The System config - GPS source is set to QMX+ Internal. Is any one else with the Beta firmware having any issues with GPS?

Finally after waiting 2 weeks to get a suitable Mic set up, today is the day. Was very impressed by the QMX+ setting itself up to make SSB. Tomorrow I go on air to test it out. Using the dummy load to test I only found one undesirable trait. Noted a spluttering on the audio that sounded a bit like RF feedback into the Mic input. However discovered that this was caused by activating "Mic noise cancelling". Left it disabled for now, thinking possibly phasing issue between internal and external mic? Incidentally the mic is a Chinese one for the usdx......I disconnected the internal speaker and corrected the wiring to suit. de VK6XT

I recently purchased this microphone kit from Pacific Antennas https://www.qrpkits.com/microphone.html for $15. The kit was easy to build and seems to work ok with the QMX+ usng a MIC Gain set at 50. Anyway I made my first SSB contact today on 10m so I'm satisfied. I've enjoyed reading about what others are trying and look forward experimenting some more. Les, N1SV

Hi Hans, thank you so much for the amazing little QMX, I'm loving it, and the fact that the SSB firmware allows me to run Vara/Winlink is amazing. I don't know if there is a feature request/wishlist somewhere, but it would be really amazing if there was some way to adjust (limit) the output power that could be adjusted from the front panel controls. I am primarily looking at it from the perspective of setting the CW or USB max output to a series of steps such as 250mW, 500mW, 1W, 2.5W, 5W. This would be especially useful if you were using the QMX to drive an RF PA for example, but didn't want or need it to put out it's full maximum output. I know the power level can be set when putting the QMX into tuning mode, being able to do this in operational mode would be really useful (to me at least). If there's a technical reason not to do this, fair enough, but if it is technically possible, is this something which could be considered? 73, Stefan MI0PYN

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

hi, may i`m wrong with some qmx+ config, but sending cw from stored messages isn?t possible without loosing some characters, as like as "cq de df4bj" may ends in "ca de dfuba" or something else. Same behavior if sending from logging programm via cat. Did i don`t have correct configs or is that an known issue? I have installed the v1_01_003, updated from 1_00_027 on QMX+ Rev 3 , but going back to a non ssb fw doesn`t help. any suggestions ? vy 72/73 de Udo DF4BJ /qrp

Installing the new SSB operating software on the QMX+ worked right away. Initial setup was completed without any instructions. Impressive work from the developer! By the way: You can see how to quickly dismantle a 20m antenna mast here. :) https://www.facebook.com/share/v/1EbbHBmeX6/

The output on the upper bands seem a bit weak on my QMX+. Is there a tutorial on tuning up the QMX+ like you can the QCX?

I have been trying to capture the digital signals driving the 2x16 LCD on my fully functional QMX transceiver. I am using an application called Scopy and the ADALM2000 learning module hardware from Analog Devices. I don't understand the captured data. I am hoping someone on this forum is familiar with this protocol and can provide some insight. My two main questions I have are: 1) Should the Enable line go high when the microprocessor of the radio is writing to the screen? From what I have captured so far these does not seem to be the case. However the reference material I read on line about typical 2x16 LCD screens indicates the Enable signal means write to the screen. 2) Should the Register Select (RS) line go high when the microprocessor is writing an ASCII character and low when it is writing a screen command? My data collection shows that there seems to be far more RS pulses than Enable pulses, which I don't understand. Am am attaching a screen shot of the data collected when I power up the QMX receiver with the factory reset splash screen. I have the Enable pin tied to input bit 0, the RS pin tied to input bit 1 and LCD data bit 0 through 7 tied to input pins 2-9 respectively. Any info on this would be greatly appreciated. Thanks in advance Mike (KC2EHR)

I know its a little cheeky but any idea how long to an update. None of my QMXs will calibrate and I have to turn the pre phase and amplitude off.

A new chat has been created: All, I've built the QMX rev 4 60-15m transceiver. I've ran all the terminal test and analysis sweep with positive results. I've even made an FT8 contact on 15m, and CW contact on 20m. However, the radio has had a behavior repeated multiple times that I don't know where to start to investigate. When I reach over to adjust a knob, push a button, or simply touch the case, the radio's screen will loose all characters, and audio will go to a loud hiss. Powering off and then on resolves the issue. The issue has repeated itself possible 8 to 10 times over the past ~10 hours of on time. Any ideas on what might be causing the issue, and/or how to resolve. Regards, Wilson Little (NT5AT) By: NT5AT - Wilson <wilsonlittle66@...> View/Join This Chat Do not reply to this message to post to the chat. You can participate in chats only through the group's website.