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Dear Greg, I didn't believe it but the GPS module did short out the Vdd bus.? I put a piece of tape over the jumper and now that doesn't happen.?? Hoping I was now past that problem I turned it on

Don't worry, the empty space will magically get filled with stuff soon enough!? Power/RF cables and adapters, earbuds, etc. tend to accumulate quickly. 73, Don N2VGU

NP0/C0G capacitors have none of these vices.? There is another level of performance available from porcelain dielectric capacitors, exemplified by the venerable ATC100A series, now produced by

Hi Greg, this is important. And I needed some time to think about your last post. The outputs from IC503 are better. How about the waveforms, something like rectangular (with smooth slopes)? Is the

When I wrote test procedures at RCA Astro, I would requisition a clerk from the typing pool (yes, we had one then), who knew nothing about electronics but was fairly bright, and ask them to run

A suitably-sized sewing needle works well also and will not damage the board. The via "barrels" which connect the board layers are very thin and fragile electroplated copper so I keep drills and

I agree with Nate. You can configure it in the firmware, and you can build something. But sharing filters between multiple bands involves compromise. I think 40-10 would be a compromise too far. It

David, The usual issues with WSPR on QRP -Labs products are incorrect frequency and incorrect time setting. The frequency should be close enough on a QMX with the ovened crystal, so check how

John, you may use a terminal session to go in "Update firmware" or you use the hardware method (see operating manual). Did you check the functions of the controls via terminal session "Hardware

With 3 LPFs available, I think it would be tough to cover 40-10 meters adequately. That's likely why Hans' latest version doesn't cover beyond 15M. I built a QDX for 40, 30, 20, 17 and 15m. Used one

Dear Bill, drilling is *very* risky which you already realized according to your remark that you hope that you did not damage any of the layers. The low-tech toothpick met

Thanks for your very quick reply Hans. Yes, I saw the option for semi QSK in the menu and have noticed it non-functional. I hope you can find the bug some day, but I know you probably have lots of

Here is the hobby-grade snorkel that I use: https://a.co/d/09VfZbpC. ?My shop is next to the living room, and my family says it mostly works for them. ?It definitely keeps the smoke out of my

Hi group. ?I’ve been using a QMX for wspr. ?First outing on 40m worked fine but it hasn’t worked since. The string is set as per the manual. ?I see power out as shown on my digital set/power

Has anyone built a QMX to cover 40, 30, 20, 17, 15, 12, & 10 Meters? I'm interested in the band and filter combinations used. Thanks - Dave, N4ELM

Thanks so much for all the advice, I am not the first one faced with this problem. ? A local ham with a big history of radio repair suggested drilling out the hole with a #60 drill bit. ?But as a

Hi Dave Yes, theoretically I am speaking at Telford in person, in 2024. It's the 50th anniversary of the G-QRP club I believe, and so some Not remotely. I have not yet confirmed reservations etc. so

I see that Hans is speaking at Telford this year 2024. Does anyone know if this is in person or remotely? I ask in case one is able to order and pick up kits from him there and thus save on

Hello Larry Semi break in is already supposed to work in QMX, as the code was inherited from QCX. For some reason (a.k.a. a bug) it doesn't work. Semi QSK is a lot easier to implement than full

G'Day All I am looking for recommendations on a case to transport my QMX (or 2 of them). I currently have this one. https://www.ebay.com.au/itm/355741304422?var=624827623900 But it would be nice to