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Hello Matt I can implement that yes. No problem. I'll add it to my list. QMX has 1, 2 or 3 Virtual COM Serial ports according to how you configure it in the System configurarion menu. Currently no

The wiki page QMX QMX_plus SSB Calibration and Predistortion ( /g/QRPLabs/wiki/39506/222685 ) has been updated by Stan Dye <standye@...>. *Reason:* Added new intro material,

The only things lost by not doing calibration are: 1) the phase pre-distortion compensation doesn't do anything (as if you had turned it off) 2) the sideband phase/amplitude synchronization is set to

D505 has an odd appearance, it's missing the T4 label and appears damaged, but tests fine with a multimeter diode tester The 331 SMD inductor in the second photo has a missing bit on the top. Should

I received my fully assembled QMX about a week ago, but dont have a mic, or a cw key yet.? I got the high bands since I am a tech so i could use 10m now, and planning on getting my general in

Thank you, Stan.? I thought this might be the case.? ?Thankfully nothing seemed to have gone wrong from the calibration of my knock-around QMX.? Already had replaced the BS170s on that one last

First the simple questions: 1) Are you sure you are not somehow stuck in CW mode, and hearing the pulses of 'dits' or 'dahs' from the keyer?? Maybe change the keyer speed and see if the pulsing also

Jonas, It is very uncommon for IC501/IC502 to fail, but quite common for IC503 to fail with blown finals. So I would first lift a leg of IC503 that connects to the output of IC501 or IC502, and make

Hi guys I have built a QMX+ Wound for 12V. FW 1_02_000 From the get go, on TX, I have in my headphones a pulsing sound. No tone to it. It’s a fast pace pulse. Maybe 3-4hz. When using the SWR tune

Two comments: 1.? If calibrated at a lower excitation voltage then operated at higher excitation there will be co compensations for the higher voltage.? This is the same as if a calibration does not

That's too bad.? This is the first one I've heard of with the wire broken from the factory.? Chips off the top are common, and don't affect performance. If the broken wire happens to be from an

Thats what I said I have to reach for perfection in my build couldn't help myself ?

No, Mike, you don't want to do that, unless you also want to run the QMX at that lower voltage. This is because the calibration routines store the phase compensation values for voltages across the

No

Would it help to feed the QMX under update with a lower voltage, so as to reduce the strain on the BS170's during calibration?? For example, if I feed my 12V QMX with 9V, the power drops by about

Thanks Richard for the reply, but further checking also highlighted the thread breakage. Honestly, I don't understand how it happened to be and it's not cikpa of transport. I'll ask Hans Süuto to

Of course I know he said this. But what the heck. [email protected]> wrote:

ABS version 1.2 was released by Sardar late last year.? Detailed info is at: https://github.com/AC8L/QMX_Plus_Autotuner_Internal_Battery_Speaker/tree/version1.2?tab=readme-ov-file Cal and I did a

The consensus seems to be it doesn't affect it at all. If you have the little piece and it bothers you super glue it later. You can search on broken coil etc.

Do not do it if your not comfortable.? Hans said calibration is not required and the unit works fine in SSB without it.