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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.

A new chat has been created: Hello Hans, hello guys, I designed my QRX+ for a supply voltage of 9V by appropriately designing the output transformers. I have now also tested the current beta firmware 1_01_003. I assume that the choice of operating voltage is irrelevant for the firmware. Of course, the required calibration was also performed before the tests. Optimal parameters were found in all individual calibration runs. During testing, however, I noticed that the PD parameters on my QRX+ behave differently. The effect of the software switch for phase pre-distortion is reversed, i.e., the ID3 spacing improves when phase pre-distortion = OFF. The CESSB and amplitude pre-distortion parameters have no effect. I also noticed that with a drive level of 900, in addition to the highest output power, the best ID3 spacing is also achieved. Reducing the drive level steadily worsens both parameters. A dependency of the curves as shown in the diagram could not be observed. Any speculation as to why the firmware on my QMX+ exhibits this behavior? vy 73 Juergen dl9jgo By: Goeckeritz Juergen <groups@...> 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.

I have a nice QMX+ and QDX for sale. The QMX+ has a case and GPS unit installed. Work good. Typical power outputs. It has the SSB software but has nor been calibrated. $185 shipped to CONUS (Lower 48) The QDX has the case as well and also has the typical Power outputs. $90 Shipped to CONUS Email markf1952 at hotmail dot com N5MF

Kudos to Hans - the beta was well worth the wait! Thanks again to the folks that helped me earlier this year locate and replace the bad switch. I had not used the little beast that much after confirming the repair, mostly due to time commitments. Did get some good reports on CW, then shelved it until firmware beta 1-01-003 that covered SSB was dropped. The firmware upgrade was straight forward. I constructed two Mic adapters, one for a spare ICOM HM-219 and one for a Heil ProSet Elite iC. Both worked well without adjustments of any kind. First voice QSO was this afternoon on 40M with VA3XV up in Ontario (about 400+ miles). He reported the audio to be as very nice, as good as my 7610. The QMX+ even received a 54 sig report when the QSB and adjacent frequency QRM was not present. Next up configuring it for fldigi - FSQ and other digital modes... and of course portable ops. So far this has proved an excellent and surprisingly full featured little rig. -- Jack Spitznagel KD4IZ FM19oo Parkton, MD

Hi, I've just finished my QMX+ rev.3 (firmware 1_00_027). Everything seems to be working correctly, except for the SWR and PWR does not show. They don't appear on the LCD, even though I have them enabled ON in the setup. The LCD display is working properly, showing the battery icon and clock, frequency, etc. Any advice would be welcome Thank you so much! 73 Miguel

I am a newbie and have purchased three of the ProgRock2 units and planned to use them as crystal substitutes for some HC6/U crystals I’m unable to obtain (without waiting a long time for these to be built). Frequencies between 8 and 20 mhz are needed for a WWV receiver I’m restoring. I’ve gone to the QRPLabs site for instructions but unable to follow what I need to do. I’m using a Windows 10 desktop computer and have the USB cable with the proper connector to plug into the ProgRock2 connection. The online instructions appear to be using a Linux app that I can’t find on my Windows computer. What I need is a “cookbook” process for programming the ProgRock2 to the frequencies I need. I realize the output is a square wave and this may be a problem but first I would like to get them set up for my needed frequency before dealing with any square issues. Any help with this would be greatly appreciated. Tom N5AMA

Hi I built a QMX mid-band, it started up first time and everything seemed pretty normal except for low power output. tx into a dummy load with a 11.9v supply: 60m 9.5v(red) 1.7w 1.04swr 40m 9.5v 2.4w 1.05swr 30m 9.5v 2.4w 1.05swr 20m 9.5v 1.8w 1.10swr 17m 9.5v 1.5w 1.14swr 15m 9.6v 1.3w 1.2swr Thinking the RF out was low, and seeing the low voltage on the transmit diagnostics, I looked at the 4 output transistors, without the washer heatsink. After a few of seconds of tx, 3 transistors were hot to the touch, and one was cool (Q504). I visually checked again for problems around the PA, nothing visible. I was attempting to measure the ground to gate voltage, my hand slipped and the DMM probe shorted something near the PA, my (non-current-limited PSU) made a nice high-current humming sound and now QMX won't switch on, no terminal on USB, nothing. I'm hoping that all I've done is cook one or both SMPSUs? or will it be worse than that? I found a guide to testing the SMPSUs, do we think I should start with that? /g/QRPLabs/topic/qmx_troubleshooting_help/100642561 I'm seeing 12.06v in and 11.30v at the pins of one SMPSU board but nothing else. Any tips or pointers would be appreciated. Hopefully its not just"buy a current limited psu and a new kit". Cheers Dan G7NNZ

I seem to remember reading a post that when powered with 9V, QMX+ will give a steady 5W output on all bands, but I cannot find that message now. Is this true or is it my memory playing a game on me? 73! de Bekir TA2RX

Everything else seems to work, but no AGC. As a result, there is distortion on loud CW sigs. Yes, it is enabled in the Audio menu. 027 firmware. Any ideas would be appreciated. Thanks, Dick, K5AND

Hi, Although I got my licence over 40 years ago, I never pursued amateur radio as an interest until now. So, I was very excited this week to take delivery of my first HF rig - a new assembled QMX+. Even more excited, when connecting it to a homebrew efhw I could hear CW and see the decoded morse code (which I am currently learning). But all that excitement was marred by me being an idiot and not inserting the cr2032 battery for the RTC correctly. I assumed I just had to push it into the holder when I should have slid it in under the +ve connectors - so when the time was being lost on shutting down the rig I found that I had bent the +ve positive pins so they were in contact with the -ve terminal of the battery. I bent them back so when inserting the battery correctly they are now in contact with the +ve side of the battery but I lose the time every time I power down. I have tried different configurations with the Real time clock parameter set to QMX+ RTC or software, manually setting the time or attaching the antenna for the internal GPS module and letting that set the time but with no success. So have I damaged the RTC components? Paul G8MAD PS it was reading the posts in this group and all the support that it offers that made me decide to go for a QRP Labs radio. Thanks.

Bought a QDX-M on Ebay for 10m, was supposed to be working. Instead, it got shipped to me with blown finals and a broken BPF toroid wire. Replaced the BS170s with QRP-Labs supplied parts, re-wound the BPF toroid and added a diode across L14. Worked great then, putting out just under 4W with a 12V supply. Took it to Brazil on vacation, and it worked well for me there on both 10m and 12m. Brought it back and putting it up for sale, as I have 4 other QDXs and don't need this one further. $100 shipped within the lower 48. (through this group... priced a bit higher on QRZ) https://forums.qrz.com/index.php?threads/qrp-labs-qdx-qdx-m-for-10m-12m.947603/ -Nate N8BTR