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.

thanks for the confirmation Hans

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i may have to buy a QMX to have a play, as lack of multitone digital modes was all that was holding me back :)

Peter?

M0PWX

Figured it out. I got a solder bridge across two of the pins of IC204.

It continues to start up in boot loader mode. I can't talk to it using WSJT-X, it always starts up as a thumb drive.

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:

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.

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:

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:

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 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

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00,000,032

hh:mm:ss? < 32

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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.

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Hi Hans, it wasn't that tricky :-)
have a look at /g/QRPLabs/message/142338?p=%2C%2C%2C20%2C0%2C0%2C0%3A%3Arecentpostdate%2Fsticky%2C%2Cqmx+rtc%2C20%2C2%2C0%2C112053543

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:-) WOlfgang OE3WHU

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p.s. the cr2016 will be replaced by a LIR1025 and a little charging network.
If there is some spare time at any time? (hihi) ... i guess the STM32 can be configured to support charging of the RTC Batt .. but i know this is far at the end of the list :-)

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p.p.s? you delivered a master piece with the QMX

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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.

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Randy

VE3JO

Thanks Stan!? That fixed it.

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