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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

Extra style points for tacking the wire/tubing down with Krazy-type glue. 73, Don N2VGU

Don, These are pretty dinky supplies, no need for your 3/8" copper bolts. But the file certainly makes for lots of crud to study. I loaded up the supply with 50 ohms on 5v, 25 ohms on 3.3v (100ma

Greg, I had to download the zip file version of Hamlib, that got it by Mcaffee.? Unzipping the file just to get the single .dll file I needed gave Malwarebytes a fit, so I disabled the anti-malware

You won't lose your calibration settings if you re-install v_027 of the firmware, unless you do a Factory Reset. Firmware update preserves all compatible configuration settings across update

It would certainly be nice for McAfee to fix it - I am pretty confident it is a false detection. I checked the file with several other scanners; a couple had problems with it, others didn't. Stan

I would start by doing (from the Hardware tool page of the terminal app): - LPF sweeps of each of the bands - SWR sweeps of each of the bands both with a dummy load attached. But first make sure you