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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.

I still fear doing SSB calibration after uploading the firmware. . And won't. Perhaps Hans can suggest safe guidelines to do this, maybe it's a new firmware thing. [email protected]> wrote:

Received the kit from FedEx in a perfectly intact box. The content check was positive with the exception of the L501 inductor with the partially broken edge. Can this defect affect the operation of

Ludwig, I see. Well I decided to send it off to Jeff (W1NC) to have it fixed. If it comes back working, I will NOT be doing the SSB calibration again, that’s for sure. Thank you for your input. Much

Hi Ludwig, Thanks for the link. It seems the LPF selection works fine, as voltages are like in the document also for the bands without any significant output power. However it seems that even though

I just built a Pacific Antenna mic kit for my QMX+ and it works great!! If you need a mic for your QRP-Labs transceiver kits I would look at this unit. Very simple to build and inexpensive. 73/GL

What power source were you using?

Hello, I ordered a fully assembled QMX in April, and got it about two weeks ago.? It died while i was listening to it. I maybe have listened to it a half hour total or less. i was switching bands and

Hello all.? Just received my pre built QMX low band today into the US via DHL Express.? No tariff / brokerage invoice attached.

Plenty of PA's have inputs nowhere close to? 50 ohms resistive.? ? ?What does the nanovna see looking into the PA ( for interest as impedance will likely change markedly? with input power level )

I have been running firmware 1_02_000 on my QMX+ with good results on CW and SSB (haven't tried Digi yet) since the release of that firmware. So yesterday, I updated my original QMX with 1_02. The

I realized it. I hope he can provide me with one...

Ludwig, Q508 was checked based on the values you gave and did not show any issues.? I did not check d516.? The failure may have occurred from severe rf feed back as right before failure I had qmx

I seldom print anything out these days. I keep all of my schematics and PDF manuals in the cloud, so I can access them anywhere with a laptop, phone or tablet. When building my QMX+ a few weeks ago, I

Robert, this would be wrong. There are rectangular pulses with 0 V for low and 5 V for high and duty cycle 50 %. Your DMM should read the mean value of 2.5 V. If realy 3 V IC503 could be wrong. This