Re: Calibrate the QMX's time through Android APP(FT8TW)
Perhaps you downloaded ver 0.93 instead of ver 0.93a of the app. You are describing the prior app behavior. Stan KC7XE
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Stan Dye
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#146062
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Re: Calibrate the QMX's time through Android APP(FT8TW)
I watched this video and downloaded and set up the software.? The software communicates with my QMX as it is able to set the frequency.? However when I press "SYNC TIME" my QMX clock display area
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Brien - KE7WB
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#146061
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Re: 50 Watt Power Amplifier - Low Power, High Harmonics
#50w
#50wpa
Is my gate drive voltage way too high? I rewatched the NA5Y video tonight and he mentions in passing that the gate signals are 13 volts peak to peak.? The archived scope photos in the old posting by
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wtshyman@...
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#146060
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Re: New QMX+ Calibration victim
I agree with Stan. A limited current power supply is very useful, especially when first powering on a new build. If it current limits at something over the expected current, you can usually address
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Jerry Gaffke
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#146059
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Re: R520 Wrong component value.
10 means 10:1 1.0x is for near 1:1 Do check R520 and R522 and surrounding components, but it seems more like you have a T507 problem, a T501 problem, or a problem with your LPFs or the LPF switching
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Stan Dye
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#146058
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Re: RIT in N1MM
Not until the wizards of N1MM+ software development implement a QMX/QMX+ radio model that uses the QMX CAT in the way it wants to be used.
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Stan Dye
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#146057
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Re: Hi SWR, sometimes
Yes, and the 'default' frequency used is the band 'Frequency center' specified in the Band Configuration.
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Stan Dye
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#146056
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QLG2 GPS
I plan to build a QLG2 GPS Receiver Module to use it with my QCX+ I will add: - the blue LCD accessory kit; - the Customized case kit (enclosure). I guess I will have to order it with the "Front blank
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Pierre - FK8IH
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#146055
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Re: Solder pot for toroid leads
I have had mine for a long time and do not know how I got along without it after they got rid of Strip-X.? I use the default tips; although other sizes are available I haven't needed them.? Very
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Donald S Brant Jr
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#146053
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Re: T507 and SSB SWR
Hello everyone! I am happy to report that although the problem with initial SWR on my QMX+ being too high, and sometimes triggering the protection, is still there, I have managed to mitigate the
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Joel W9JFK
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#146052
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Re: 50 Watt Power Amplifier - Low Power, High Harmonics
#50w
#50wpa
I tried 100 mA standing bias this afternoon - some change in the waveforms at the output of T3, but no-where near what it should be according to the troubleshooting video by NA5Y. Guess I'm ordering
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wtshyman@...
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#146051
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Re: New QMX+ Calibration victim
True. However, a current-limited power supply is an important part of doing first power-on tests, and also debugging if you already have a short. It may not prevent damage to a part when there is
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Stan Dye
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#146050
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Re: FDIM 2025 - Bringing SSB to the QMX (Hans's presentation)
The cellular handset transmitter industry has been using polar modulation techniques for decades, and it was invented by Thomas Edison. It is certainly great that manufacturers are getting actual
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Donald S Brant Jr
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#146049
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Re: Introducing QMX CARROT
Chris, Your power draw looks pretty typical. I've done many activations with a 3 Ahr LFP and have never come close to running out of power, even when I have done 5 parks & summits in a row. Can't wait
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Daniel Walter
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#146048
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Re: QMX+ Broken Toroid Core
lol. ?I grabbed the gel/type superglue at HarborFreight. ?First time I¡¯d tried that. It was a bit blobby. ?I got rid of the excess with a toothpick. ?Let it cure while I was winding/installing
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Ed Meyer, WG5F
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#146047
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Re: QMX+ Broken Toroid Core
My two cents, from model ship building where lots of super glue is used - make sure your superglue is fresh. After about a year of sitting around, opened or unopened, it loses some of its adhesive
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PHILIP GRAITCER
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#146046
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Re: Solder pot for toroid leads
Agreed. I keep my odd bits of wire on the washing machine, at present. ;-) I keep several gauges of magnet wire on hand, but didn't have the exact size included in the kit so after screwing up one
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Lawrence KC6WOG
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#146045
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Re: QMX+ firmware feature request
My follow-on suggestion may get some pushback but I'll throw it out there... I'd like "Tune SWR" to be a *top level menu item,* or at least be optionally at the the top level, and the first item that
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VA3CJO - Chris "CJ"
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#146044
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Re: QMX 1n4007 diodes
Hans says the boards are specced for a 0.8mm drill size. With a 0.7mm lead that only leaves 0.1mm, or 4 thou in real units, for the through-hole plating (equivalent to just 2 thou on each side of the
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G0GNL
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#146043
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Re: QMX+ Broken Toroid Core
Wow, be sure to use plenty of glue! ;-) I use the water thin variety of c yanoacrylate glue for this sort of thing, you end up with virtually invisible repairs and it saturates all of the cracks. It's
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Lawrence KC6WOG
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#146042
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