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The LPF graphs give the impression that the LPFs aren't working, that there is a short bypassing all the LPFs regardless of the band selected. One check would be to look for the 3rd harmonic being

"Note that the receive S-meter and AGC meter do not work in DIGI mode, only in CW mode, because AGC is only implemented for CW". Now it's clear. The tests are in DIGI mode, that's why SWR & Power

The internal GPS sets my clock within a few minutes. The problem for me is that no matter what the ‘Real time clock’ is set to at power down the clock is always 00:00 at power up.

Hi all, first off, thanks to Jeff Moore who helped my QMX midband, and noticed my silly mistakes. Second off, I've just finished a QMX plus and am fairly happy with it except for the fact im getting

You can do some trial and error yes. However all the QRP labs TCXOs I’ve seen are within a few HZ of 25MHz and that’s a beat note /error you couldn’t hear/zero sufficiently accurately by ear

I think it indicates something very wrong.? Has it always been this bright?? The screen backlight, properly working, is brighter than some prefer, but it is far from being bright enough to wash out

I have assembled and have working a QMX+, with one caveat;? all of the LPF sweeps are bad. The audio filter sweeps, RF filter sweeps, image sweeps, and SWR sweeps look reasonable, although on a

I have assembled and have working a QMX+, with one caveat; all of the LPF sweeps are bad. The audio filter sweeps, RF filter sweeps, image sweeps, and SWR sweeps look reasonable, although on a

I have a working QDX, REV-5 pcb, low band and would like to make it more bullet proof with the LTN20069 heatsink and 4 of the TN0110 transistors. I haven't seen any pictures of that. Are there some

I usually didn't try again after I got it to work.? So I don't really know.? In fact, I have no idea why changing the band settings would help it to work - I don't think it has a direct relationship

I recommend using your voltage monitor to see what happens on the port with your 12V trigger cable, when you plug any one of the other ports into something.? Mine reduces the 12V port to 5V if I plug

Hans' comment means that you need to read the QMX/QMX+ operations manual, and the correct data is there. Yes, the power and SWR meter work on both QMX and QMX+. If they are not working, it is possible

If this is the power supply you have been using to operate your QMX, that is what caused the problem.? 13.4V is too high a voltage for QMX, as explained (in boldface red) in the assembly and

I would like to know if I can apply the following procedure to calibrate the Ref frq without GPS? Using a QCX+ 20M Band I would go to WWV 15MHz and read precisely the frequency for a zero beat. If I

There are three primary audio gain controls. The first is in Band Configuration.? Audio level set here is applied very early in the processing, and affects I/Q output as well as the rest of the

Hi, The power output list is fine. It is what it is, and if you build another one, it will be just like that. Which is wonderful! 73, George K3GK

Yep. Ran into that too. Appreciate the possible alternative work around. GREG Yahoo Mail: Search, Organize, Conquer On Thu, Apr 3, 2025 at 8:23 PM, Mark K9TR via

Appreciate the info and that you checked the file too. And of course, the great general group support. I've saved a bunch of your troubleshooting recommendations and signal flows

Braden, I agree this is a bug. I also had this problem when I first entered and edited messages. I found a way to fix it from the QMX front panel: 1 - enter the message menu, and select the message to

Thanks for suggestions Stan and co. Confirming that with GPS connected and RTC source set to "software" the clock became accurate within a few minutes. de VK6XT