No, not really. I expected 5 watts EVERY band and have fiddled and diddled with windings and spacing and chanting in strange languages to get what you got which was not that much different than anyone else.

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The BIG difference for the QMX+ for me was rewinding T501 with the Really Weird Twisted Sister as I should have in the first place.

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You got a good unit for 25 to 50 extra bucks! I love? building this stuff but the people who build them for Hans do a pretty good job for not much moolah.

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73
Karl
KI4ZUQ

On Tue, Dec 24, 2024 at 04:23 PM, <terompet@...> wrote:

Should I be disappointed?

Oh, no. 3.3 W compared to 5 W means only 0.3 s steps lower.

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73 Ludwig

I guess I should have had 3 watt expectations when I ordered. C'est la vie.

On Tue, Dec 24, 2024 at 05:53 PM, @Ludwig_DH8WN wrote:

give us a glue

oooh, sorry, I don't want to glue. Please read clue.

Hello Rico,

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you may follow .

Without success screen shots from Terminal QMX QMX_plus Terminal - Hardware tests are helpful. The results may give us a glue where to search for problems.

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73 Ludwig

Rico,

All good suggestions for you in these replies. Don't look at this as an expensive mistake; it is a great learning opportunity to learn troubleshooting. Another approach is to get in touch with someone from your local ham club or group. I am sure someone there can give you assistance. In any case, it is very likely that your problems are solvable.?

Good luck and have fun learning!

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And Merry Christmas!

--

73, Dan? NM3A

Those look pretty good. Remember this is a QRP rig. The slightly lower output from what you expected will only make a difference in your mind, and will likely help preserve your finals.

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73, Dan - W2DLC

Ge

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Many thanks for the information I will get back to you with how I got on in a couple of days.?

Thanks again.

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Paul

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m0pnn

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My new assembled QMX+ showed up on my doorstep yesterday and I was very excited!? Everything checks out fine, but I find that I am disappointed in the reported power output levels: 160m 5.7w, 80m 4.8w, 60m 4.1w, 40m 3.9w, 30m 4.5w, 20m 3.3w, 17m 3.1w, 15m 4.5w, 12m 3.2w, 10m 3.8w, 6m 3.1w.? I am most disappointed with 3.3w on 20 meters since that is my goto qrp band.? I guess that I was expecting power output numbers on all bands to be closer to 5 watts.? Should I be disappointed?

works as expected... thanks Hans and team for the brilliant work....

vy 73 de Udo DF4BJ

I fitted all three to mine John. My U3 isn’t currently on the air due to a rearrangement of my antennas, though previously it has provided years of continuous service, it is just coming up to 11 years old. I remember that the GPS chip required some careful soldering, as this was before Hans developed a dedicated GPS module. 73 Nick G0OQK

Have you got a multimeter Rico?
A visual inspection of the solder joint is not sufficient in this instance if you are having problems. Set your multimeter to the resistance mode and check for low impedance across each coil. ?The measurement should be equal to that of the meter leads shorted together. My preference is to check on the coil side of the circuit board on the plated through holes where the coil wires pass through. This avoids the possibility of touching a bare wire end, that has not been properly soldered. ?Checking carefully means actually taking measurements in my opinion. Due to the large areas of ground plane acting as a heatsink, more care and attention than on other boards you may have soldered is required. 73 Nick G0OQK

Thanks, Stan,

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Using the refrigerator, I have confirmed that it is heat-dependent.? At 40 degrees, it took ~10 minutes to settle down. At 70 degrees, about 20 seconds.

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I wonder if there is a batch of QMX's with improperly soldered PCM1804's ? The thought of replacing the 1804 seems daunting, but I may look into a low-cost rework station.

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73,

Steve, N2IC

Tnx Todd,

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I’ve checked the soldering after I fitted the coils very carefully because I knew those are delicate.?

Interesting is the fact that the sound coming out of the little guy doesn’t change at all whether there is an antenna connected or not.?
But since I’m not good in electronics I’ve got no idea what to look at.?

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73 and merry Christmas

Rico, DG5BQ?

There are modifications for encoder mechanic you can do to get more slide filling.

Hello

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I am using a QMX and QMX+, but do not like the encoder to tuning the band up and down.

Every step is a grid.

Is there a replacement possible for the rotary encoder to tune the bands like on a K1/K2?

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73 de Harry, DK2GZ