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My directions were for rev03 QMX+ board that has SMPS's on the main board plus the JP105 connector. For earlier hardware with the SMPS boards, it's a matter of replacing those two plug in boards.

Steve, Thanks for getting back on this. Your 027 firmware is the latest, that is good to know. The V1 hardware should be fine. There are not many failures of this sort being reported in the forum,

Hi, Derek - I treated myself to a new soldering iron for the occasion of assembling my QMX+, a Hakko FX-888DX As you've probably seen here on the forum, the QMX+ requires lots of heat to properly get

Regarding winding toroids, I use and iPad, iPhone or other device with a camera, take a pic of the toroid and then enlarge as max as possible - makes it very easy to count the turns through the centre

My next CW practice session will be 28 January at 4:00 pm Eastern time 21:00 UTC on 20 meters. Anyone is welcome. This practice is intended for operators who are new to CW or they need some CW

I have been making notes from this thread because I will be starting my build of the QMX+ hopefully this weekend.? It's still inbound but, fingers crossed, it should be here on Friday. With all the

Jerry Gaffke via groups.io <jgaffke@...> wrote: Interesting... and truly impressive. Thanks for clarification, Jerry!

Jerry My hardware version in V.1 and the firmware 027. I don't know exactly what happens when there is a brief disconnection...and I'm not going to risk finding out...Ive used up all my luck in this

Bruce, I second your thoughts about winding toroids. It is fun and the main reason some are afraid is because someone said it was a daunting task. Don’t believe that BS. It’s just putting a wire

I've taken a similar route to Ian, only I removed the barrel connector socket completely and hard-wired a flying lead to the PCB, exiting the case through the now-vacant power connector hole. I have

I believe the gps is only needed if you intend running the QMX as a stand-alone WSPR node.

When soldering WATCH THE SOLDER!! It’s not about touching the iron to the joint /shovelling a blob onto the board / holding the iron on a wire. ? ? All of there can result in poor joints, bridges,

Roger, thanks info, will check it out. Paul

Hi Steve I concur 100% with your findings. I have lost at least 2 CPU's and PSU capacitors through this problem. My answer to it (although not elegant) is to hard wire the supply cable to the pads on

After running WSPR on Ultimate 3s, I have been running on 2 QDXs for quite some time on WSPR. One of the significant benefits of the QDX (for me) was running the timing off of my computer versus

A summary of hardware changes between the versions.? I think only the three rev1 to rev2 items are pertinent to your power situation.? You may want to update some of the others if you are having

Hi Stan, Thanks for all the infos, I have indeed a V1 kit, so I'm going to check carrefully if there are some shorts happening on the boards, I took a look at the solders to eliminate any obvious

When that screen indication is present immediately after Factory Reset, turn the bottom knob to rotate through the different selections, one of which will be "QMX+ 160-6m".? Then push the 'return'

And from the first page of the first section of the operations manual, the features overview, we have: *QMX is a standalone CW transceiver, or a Digimodes modem* You can use QMX on its own, plugging

If you have seen any videos with USB and LSB, they are referring to the receiver sideband setting, which is by default at USB to work with digital modes.? The QMX+ receives USB and LSB very nicely, a