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13:00 session only Jorma OH8TX remembered the date without announcement. Lets hope others will have time for 19:00 Martin DK3UW

Hi all, someone stated elsewhere, that the QMX+ was a good rig for contest. Not really I think. I just used it in the CQWPX as well as my Flex 1500. Well the waterfall is a + for the flex ( I dont

Hi - Wow! Thanks for your hard work. ?This looks like a worthy addition to my QMX+. ?Please add me to the second group buy of this new kit, if there is one! 73 Bob WA2I

Hi Stan, Had access to a current limiting supply this moment and I took the chance to run the functional tests on the power supply board, as well as flashing firmware like you suggested to access the

The wiki page QMX QMX_plus Debugging ( /g/QRPLabs/wiki/39617/222894 ) has been updated by @Ludwig_DH8WN <DH8WN@...>. Compare Revisions (

Thank you Jerry! I've managed to add proper capacitor at the input of PA (parallel to the secondary winding of the input transformer) and reduce the SWR from 1.9 to 1.1-1.3. It is for 20 m and 15 m

Good conversation. All I would add is that the 'charge to 3.85V' approach is fine short term if they get fully charged every few uses /? few times a year. Reason is that increasingly lithium

Likewise for a US group buy. Thanks? Dean N2TNN

I just finished my QMX+ and thought I would share my RF power out readings. I did my best to wind all the torroids evenly though not perfect. Measurements are made with an Oak Hills QRP meter into 50

Probably same thing happened to me. I didn't hear any strange sounds but once I disconnected battery and tried to boot it again, the unit is completely blacked out. Makes just "pop" sound on the

Please count me in for the group buy M0MZB in UK

Please include me as well in the US group buy. Thanks. Bill AD6JV

Starting a new thread. Scouring the web, here's mention by KG7AGO of using a GaN-FET similar to the INN650D240A getting 300 W on 20 meters with a 60v supply. https://www.qrz.com/db/KJ7AGO

I'm fully aware what the convention around C for charging rate means. Have been dealing with it for years. But the anal engineer in me is bothered that it isn't stated in the form of? "0.4C/hr".

OK - lets just suppose (until proven otherwise) that the backlight wasn't on.? Because if it was on, somehow you were getting voltage on the 5V VCC output without the processor running its firmware,

I don't think there are a set of values that will work for every build.? I tried Ellis's, and they didn't work for me, but tried several other settings and finally it worked.? Then I changed back to

Highly unlikely.? I have run calibration several times on my four different QMX* devices, always with a battery supply that can deliver a few amps (no current limit) - and have never had a problem.

Gerry, C is the capacity of the battery a decimal fraction of that is an acceptable charge rate.? ?IT measn you need to know the capacity and the acceptable chrage rate for it.? Don't beat me up

1) I have found that the low level sound card output to wsjt-x works fine.? But if you want to increase it, you can use the audio level adjustment per band in the Band Configuration.? See the

On Tue, Apr 8, 2025 at 04:09 PM, Rey Machado wrote: > > @ZL1REY Count me in for the ZL group buy