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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.

We had seven folks join the MI QRP Zoom Chat on 03 April. Please join us Thursday April 10 (and every Thursday) at 4PM Eastern for the Michigan QRP Club weekly QRP Chat where the main topics will be QRP and other ham interests. New hams are encouraged to participate and ask questions. It's fun, it's easy, and it's free. You only need a computer, a smart phone, or a tablet that can connect to the Internet. OR if you can't be close to any of those you can join by audio with any standard phone. Just follow the directions below. No software needs be loaded or installed. Anyone can join and non members are welcome. Details are here: https://www.miqrp.net/zoom Zoom ID: 811 0835 6229 The topic for Thursday, 10 April will be an open forum. Ed AB8DF Ernie NE3TE Tony W8CDC Stan WB8QJZ Stuart M0SGV John K4XNY Jean in France John is near Atlanta. He has a 50 foot end feed in the backyard, 20 meter dipole and a 17 foot Chameleon antenna vertical. He uses a Wolf River coil for 40 meters with the 17 foot vertical. https://chameleonantenna.com/collections/vertical-antennas/products/stainless-steal-whip Ernie just got a NANOVNA and wants to test a choke he built. But Taxes!!! are limiting his haming. Stuart got his Michigan Mighty Mite to work and will add some LPF from QRP Labs before getting on the air with it. He just got a TinySA but has not played with it yet. Stan is doing some Slow scan TV using satellites. ISS is one of the birds he’s is playing with. We all want to hear about the results next week. Tony survived all of the bad weather. Got a Michigan Mighty Mite board from the QRP Guys and is going though his junk box to see what parts he may need to order. Ernie is still looking at that the PERformer Antenna and how to add weight to stabilize the tripod. Here are articles that has some info on elevated radials: https://rudys.typepad.com/files/qst-march-2010-ground-systems.pdf https://drive.google.com/file/d/1LwSbXXeovjJdT8ijpOi-9FYR--nNsxgD/view Jean in France could not get the audio to work. We all hope he can join us next time. We talked about the new Yaesu QRP radio and the rumors about it. One rumor was that it has the same receiver front end as the FTDX10 receiver and will have similar capability which ranks highest on the Sherwood list. The agenda for the 10 April QRP Chat: Ernie to do a short introduction and acknowledge any new folks to the Zoom chat. The topic for next week will be an open forum. During the open forum anyone can take the floor. We will go one by one until all have had a chance to have the floor. Files, pictures and presentations can be shared if you have any. Please try to stay muted when someone has the floor. Thanks Ed AB8DF

I just completed loading the new firmware using Putty on my Win11 laptop, I also did the calibration. I took my time and made sure the QMX didn't get too warm, all seems like a success. I have tried BPSK31 and FSQ, it is working well and now to try WSJTX. I have not tried SSB voice as I don't have a suitable mic yet. Randy VE3JO

I have programmed my first message into the qmx+, but when I play it back on the air, it appends lots of extra characters at the end. The characters do not appear in the message memory when you view or edit it.