开云体育

That sounds interesting for when using at home, but complicated.

N9LFF The QMX plus is clearly a mature design for cw and digital modes. I delayed until I had time to build it, on my bench now. Best to not be in a hurry during assembly. If you are ready to build,

Oh Stan,? you embarrass me.

Hi Ludwig and Stan, I'd definitely check BS170 as well. Once removed from the PCB, IC503's Vcc to gnd seems to be open, so if it was causing short, it would have to be done via BS170 I guess? I'd

I think that's possible too. After several hours experimenting with band configuration settings and calibration settings, my QMX+ suddenly started screaming in my ear on one band and developed a

I think we have already gotten this year's big new thing from QRP Labs, in the form of the SSB update. To speculate on the new thing for 2026... perhaps a QMX XL? Something with a larger display and

Just had my first QSO.? A local ham.? Received a good audio report.? I was using the QMX+ and my "Tiny Linear".? The Tiny Linear is a 100W-capable homebrew unit.? It is in a box only slightly

Thank you for your responses and yes that makes sense. I wasn't thinking about how mosfets behave when overheated. I checked all the solder joints and ohmed out Q8 - Q11, T1 and L14 to see they had

The output of the IC101 is 0V before pressing the button, then briefly goes to 3.2V, and then to 1.7V when I press it. When you press the button input starts at 12 then goes down to 10 then 8. +V,

Good catch, Ludwig. I guess I was writing when you posted. You are always more careful than I am in diagnosing things. Han, you should order some BS170, too, if you don't already have some, and Ludwig

Hi Stan, sure. It's a charger (sorry I forgot the word "charger" in the original post), not a power bank. The specs on the bottom are: SWITCHING ADAPTER PN: A2935 Model ASGaN83w-P40W20 Input

Excellent!? So glad that it is working without other damage. And I understand completely the drag it is when you wanted to have fun in WPX.? I have been stymied for other (non-QMX) reasons. FYI, I

There is a current limit for the VCC rail. Duty max is doing this. So I don't believe the high current was flowing from VCC via IC503 to GND. Maybe something is wrong around the BS170. I see two

Han, can you share with us the exact model of Anker 36W power bank you have?? I don't see one labeled that way on their website.? Several of Anker's power banks do not support 12V PD (since it is

Thanks, Stan! I'll go look at that shortly. 73, Gwen, NG3P

Hi Andrea, I'm not sure what would cause that.? But I think one other user reported a similar issue, and found in the "Band configuration" window of the terminal interface that his 20M center

Pawel, I'm not sure about software. I'm also not sure about ESD. Maybe it is a unstable PCM1804. There are reports about PCM1804 working wrong related to temperature. Maybe here something is

Gwen, it is already listed on the website, see the link in the left-hand column under the QMX+ heading. It is complete with the beginnings of a detailed description, and what to expect. My two

0.7A is way too much, about 3x normal, confirming something is shorting. I don't quite understand your description of the voltage measurement.? Are you looking at the output pin of the IC101

Thanks, Gary, for this hint. May be. So, the hardware glitch then :) 73 Pawe?