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I was trying out WSPR with my high band QMX with settings as depicted in the instruction manual. I had my QLG2 attached and working with the green light blinking. I had the transmit set to 4 after the hour as in the instructions, and when that time arrived, the rig kicked into transmit mode. All appeared to be going with when the display suddenly changed to read the following: 14,097,140 CW 5 0 On the next line: VK4JAZ QG62 30. And there it remained, as if stuck. After a good few minutes I shut it down as nothing appeared to be happening. Any ideas what this means?

Here's one source Bill https://kitsandparts.com/toroids.php Ron

Hi all, This is my experience with the SSB beta release. After much fear and consternation, I took the plunge today and installed the SSB beta firmware in a QMX Rev 1. I attempted to do a calibration on Putty, but the R and O commands would not work. This could be due to my inexperience with Putty or a failure to understand the instructions. I disconnected the QMX from my laptop and was able to run the calibration from the Hardware Tests screen on the radio. The QMX got a little warm, but the calibration was apparently successful. Afterward, I checked the CW power output on several bands, and it appeared to be normal (same output I had before the calibration). I did not put the QMX back on Putty to check the calibration curves. I tested the SSB mode with a QRPguys microphone kit and made 8 successful phone contacts on 20M. Audio and signal strength reports were good. The mic is covered by a cutdown foam windscreen purchased from Amazon, and the only mic setting I adjusted was compression set at 5. I found the best output occurred while talking straight down into the mic held about an inch from my mouth. Probably because the mic element is a setback from the vinyl cap. I have not tried other bands yet. I am mainly a CW op, but after the successful SSB implementation I may have to start making more phone contacts. I'm almost embarrassed to say it was fun! 72, Randy NR5N

So far everything seems to be functioning well. I have noticed that when using the swr tune function that on some bands the swr reading does not change while tuning an antenna and I have to turn it off then on again to get a new reading. This didn't happen before and would change as I operated a tuner. Randy VE3JO

When I use SSB mode do the 2 m by the USB icon change? Because I'm on an antenna with 1.3 SWR but it's showing much higher when I use SSB mode.

I have a QMX built by QRP Labs. I haven't updated to the SSB firmware yet. Do I need to calibrate? How do I do the calibration process? Thanks.

I have a QMX (80-20) for 12 V that I built last year. It worked fine on FD, and was used occasionally since. A few weeks ago I was running it into a dummy load. Controlled by fldigi. Power was a LiFePO through a regulator at 12 V with a 1.5 A current limit. After messing around with the fldigi settings until I got it to "transmit" into the dummy load. Output power and input current looked good. Then I got distracted doing something else. After some time I looked at the regulator and it was showing 6.1 V at 1.5 A out. The radio is on, and the display works, but obviously something is seriously wrong. WSJT-X communicates with it. I can change frequencies and modes. I looked at the back of the main board with my IR camera. The hot spots appear to be associated with Q507 and Q504. So I've blown it up, but I don't know what I did. Is there a troubleshooting guide? I've opened it up and there's nothing visually apparent. In talking this out I've sort of convinced myself that I have a shorted Q504, drawing too much current and heating up Q507. Does anyone have any better ideas? Is there any way to test this hypothesis other than cutting Q504 out of the circuit and seeing if the excess power draw goes away?

The wiki page QMX External Microphone Options has been created by Andreas DM7AK <mail2dm7ak@...>.

Just to satisfy my curiosity : which TCXO chip comes with the QCX+ TCXO option? 73 - Pierre - FK8IH

Hello OGs, YLs, Question, actually it could be a feature request.. The stm32 chip has an internal real time clock. Wouldn't it be nice to make usable? Currently the clock may be shown on the display ant it starts counting - starting from zero on power-on. Two things would be needed: - software - a settigs menu where the user would be able to set current time without a need of playing with gps - hardware... the diagram shows that cpu's vbat leg is connected right to the gnd... adding small battery there would be required to persist the time on power off. And since stm32's rtc draws some microAmps, some small button battery should suffice. What do you think?

Just retried a change of tcxo frequency down by 6 Hz. As before it did not work...audio connectivity was lost and had to do a master reset to get it back. Very annoying as have to customise my rig over again. Yes running the 003 SSB firmware. There were other weird symptoms but won't "muddy the water" describing those. de Vk6xt

Fat fingers did it again… Accidently turned on the Two Tone Input. Changing to Ext Mic fixed my problem! Sorry for wasting a little bandwidth…. See you QMX SSB! Mike

Hi All, Upon PPT on the mic sends out a high pitch tone(squealing like a pig in the midwest!)…I am getting good SSB voice transmissions on both my high and low band QMXs’. So pretty sure the mic and cable are not the problem. Any others seen this on their QMX+?? Any ideas for where to look? SSB configurations are the same in all 3 radios.. thanks Mike. n0mpm

https://varac-hamradio.com/so/08PO64Srp 73 DE muhsin TA1MHS

Hi! I recently posted about having some bad reception on my qmx after updating the firmware... Well it seems that it is something related to the hardware of my unit. I checked the RF filter sweep and it seems that my unit became a bit deaf. How should I proceed from here? What tests should I do? This unit was working before, so my guess its that I messed up something This tests results are after a fresh firmware install and a factory reset. Thanks in advance! 73 de EA4IIF.

2 fairly simple question, not seen anything oblivious in the digest emails, so apologies if these have already been addressed @hans 1:- now we have the SSB firmware released, can we now do multitone digital modes? or does SSB only work on the mic input and not the USB sound card? 2:- if question one is yes multitone is now possible, will the SSB functionality be a possible enhancement to the QDX as well so it could also do multitone digital modes? thx Peter M0PWX

I replaced the bad output transistor in my QMX, and it wouldn't boot up. I get a USB drive, so I can talk to it through my computer. I tried dropping v27 firmware on it. It hangs on "Initializing: Radio Load" for a long time, then goes to "Band Version QMX 80-20m", which is right. If I leave it it goes to 00,000,032 hh:mm:ss < 32 Where hh:mm:ss appears to be the time it's been up. I've waited on that screen for a long time and it doesn't go anywhere. I can't turn it off from the power switch. So I cut the power. When I turn it back on it starts drawing power, but the display never comes on.