I was trying out WSPR with my high band QMX with settings as depicted in the instruction manual. I had my QLG2 attached and working with the green light blinking. I had the transmit set to 4 after the hour as in the instructions, and when that time arrived, the rig kicked into transmit mode. All appeared to be going with when the display suddenly changed to read the following: 14,097,140 CW 5 0 On the next line: VK4JAZ QG62 30.

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And there it remained, as if stuck. After a good few minutes I shut it down as nothing appeared to be happening.?

Any ideas what this means?

Actually I thought I read that the QMX+ already used the stm32 RTC output ?

Just to satisfy my curiosity : which TCXO chip comes with the QCX+ TCXO option?

73 - Pierre - FK8IH

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Most all recent USB-C power banks support PD, so it is likely to work.

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I would get a smaller/lighter one.? I have two small 10,000mAh Ankers, and each is good for several hours of QMX operation.?

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?

I finished assembling my QMX+ (including a battery mod) and finally got the chance to test it.? In the diagnostics everything appears to check out, until I press P.? At that point the SMPS bias current for every band is ~4.6mA (where the PIN forward bias is 30mA).? If I press T (while connected to a dummy load), the RF output and the Transmitter Voltage turn RED, with the Voltage reporting ~9.5-10.0V.? Power is consistently listed as 0.0W, and the SWR (into the 50 Ohm dummy load) is all over the map.

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Any ideas what I did wrong?? I've looked at all of my soldering connections multiple times and don't see any bad joints or bridges.? I've checked everywhere I can think of for continuity, and everything has checked out so far.

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 Bill,

No not the mic. The QMX+ is transmitting the tone to a nearby receiver. ?Not a feedback issue. ?I cannot hear any voice at all.

Mike

Ah yes, thanks Pierre. Very enlightening.

Mike,

??? When you press PTT, You hear a squeal *FROM THE MIC*???? And yet you're getting good transmissions??? Something about that doesn't make sense to me.

???? Can you explain the issue in more detail?

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Bill

W2EB

East Syracuse, NY

On 4/5/2025 at 7:53 PM, N0MPM via groups.io <n0mpm52@...> wrote:

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?

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SSB configurations are the same in all 3 radios..

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thanks

Mike. ?n0mpm

I don't think I can, there's no room for images in this site.

Here are the images, in case someone can coerce it into doing things

I ordered, but have not received yet, the:

Mark K9TR

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Tony, list of the countries:

73 - Pierre - FK8IH

On Sat, Apr 5, 2025 at 10:37 PM, <rentwist@...> wrote:

It’s not just FedEx, I had a similar experience with UPS recently (was not a QRP-Labs order). The UPS fees were more than the tariffs and in total amounted to 24% of the order total. ?Sucks.

Trouble with these measures is that it not only about the tariff, it is also about the extra work involved, with all the forms to fill it takes easily somebody 10 to 15 minutes to process it, plus they charge taxes plus overheard plus their margin.... Similarly, I got bitten after Brexit and paid more handling fees than taxes on a kit I bought in the UK. There was a movement against red tap in the 90s but it just got reversed about 10 years ago. It isn't just the US, all populists around the world do the same. The irony is that the very same people were whingeing about red tape, we live in a bizarre world.

It’s not just FedEx, I had a similar experience with UPS recently (was not a QRP-Labs order). The UPS fees were more than the tariffs and in total amounted to 24% of the order total. ?Sucks.

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So as @Ludwig_DH8WN pointed out, I checked the soldering of the L401, there were some toroid soldering points that were not making good contacts. After soldering them well, the measures are of around -10 to -18dB. Thanks to y'all for the help!?

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Now the unit works as expected I even managed to make a QSO with the new SSB firmware!?

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Thanks again for the help pointing out where to check!

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73 de EA4IIF.