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Is your concern related to power output on 17/15? On the mid-band QMX, adjusting L513 seems to have the biggest effect on power output. /g/QRPLabs/message/118629 GL de va3rr

Jeff is right on, Rule #1 of troubleshooting is fix everything that you know is wrong/out of tolerance before going any further. To quote the great Gene Kranz, "let's not make it worse by

Also, that is an edge-mount connector, is that what your board requires?? If so, please share board thickness as it is pertinent to making the right connector choice. 73, Don N2VGU

Here is a picture of the low pass filters, when I was assembling.

Adding some pictures of the build. Still curious if anyone else has done similar things with the filtering as far as miss matching them, and changing the defaults. Also interested if anyone who

Just a sanity check or two.? Stan's mention of the QMX needing to be powered off, the USB cable needing to be connected between the Q and the PC and then powering on the Q is spit on. Then open

when I did the smoke test, I instantly got a USB drive pop up when powering on! The firmware loaded and all the tests showed perfect from 60 to 20, however the 17 and 15 was less than normal, 15 in

Ian, Alas, I do not have a scope. Current is not going that high. I believe it's only going to 0.255A. Michael WD0OM

Jeff, It may be easy to diagnose circuit if you know where to look :-) The point for me right now is, I don't. I do not know what my next diagnostic step is to discover where my current is going or

James, like Don wrote its impossible (or the Nobel Prize ;-)). Thanks for the lot of information. To the pictures and tables: * Looking at picture 6 and 7 I see something light green at a solder of

I seldom use the approach of pulling on a thread. ?Hi hi. ?My approach is to fix what is obviously wrong. ?Then go to the next thing that is obviously wrong. ?In the end all gets fixed. ?And I

I'd be tempted to try two things. 1) With T501 still removed, bend the wire ends down as if they were soldered into the PCB and make the continuity checks for the primary and secondaries again. Look

Hello Todd, where did you measure VDD = 3.28 V? What is the status of the SMPS 3V3, "SMPS" or "analog" (or so) (see Diagnostics screen)? Could you show please a screen shot from terminal -

Hi This is a known firnware issue. I'm not yet sure what the cause is. The workaround for now is stepping up a band then down again. 73 Hans

Michael, Be careful pulling on threads…. When I do that everything becomes unraveled. Have a great time exploring. The outcome will be fun and Jeff and others are standing by to help further. Be

Yes I have experienced exactly what your describing.

Michael If you hear noise in the headphones, that's good. The fact the link is fitted is good. But connect an aerial to check the RX is actually hearing things. Your Description of SWR bouncing

I'm running 1_00_027 firmware on a Rev. 1 QMX that I recently assembled. Everything seems to be working very well, except I have this strange problem with the RF Filter Sweep Test. When I first run

Hello Stan, After T501 removal: - No cont between any of the A and B points in the PCB (same letter or between letters) - T501 exhibits no cont between P and S - T501 all P have cont to each other -

How sure are you of your measurement tool? I had similar low power show up for 15m QDX on an ATU-100 (modded for qrp). I thought QDX died, as it showed only .2w But when I connected it to an