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*I strongly suggest, Hans, that you please add a warning in your assembly manuals for builders to deburr their ferrite cores.* I neglected to do and also snapped a wire off T401, never before having

Hi, Got a QMX on the workbench, and pulled up the terminal emulator window to run diagnostics. I'm currently seeing a great yellow trace on the ADC/IQ sweep that looks normal, but a very very erratic

Thank you, STAN My QMX symptoms are: < loud noise and (nearly) no real signals when receiving > seem to be very similar. I'm starting to suspect PCM1804. I also carefully checked L401a/b and T401

Egads, reading a thread from you all is like reading a techno-montage from a Doc Smith novel. This thread reminds me of Brandon and Westfall, or Cleveland and Rodebush, or Seaton and Crane, all

I was wrong. ?It was operator error. :( The .zip file is okay too, Sardar. It contains only the original "legacy" .hex file in it, if the correct branch is downloaded! I don't know why github retired

Hi, I have previously built a 50W PA for 40m that has been great. I would like to build another to use with my mid-band QMX with 17m. The 50W PA comes with components for 80, 40, 30, or 20m, but the

I found the problem, Sardar. There are two ATU .hex files in version1.1-beta and they are different (as reported by my "diff" check). This one is up to date:

Yes, that was the entire point of making those markings so the JLCPCB order number if forced to be printed on the back of the PCB. And avoid an additional cost by rejecting the order number imprints.

Hi Pedro, There may be two issues here; we'll be lucky if it is just one. First we will examine the transmit circuits:? your LPF sweep failure and you 'T' failure in diagnostics point to a problem in

No, I do not think those minor changes should trigger any issues. I would panic let's say, if I had to move around either ATU or J1 connector. Not today though :) Same here. I also have 3 sets of

For L401, use the A,B,C,D,E test points on pg 42 of the assembly manual, step 8 as described there.? (These are in the section for the high-band version of QMX, but apply also for the mid-band

The most common receive/audio path issues from kit assembly, that are independent of transmit, are: 1) T401 - the trifilar transformer.? Make sure you matched the pairs properly, and all of the

Thanks for the confirmation Sardar! I have three sets of boards that I purchased that I need to recover, expense-wise. Only the ATU boards are somewhat expensive and the only thing changed is they

Can you give me a quick continuity test list? I checked them all before assembly, but may have missed one because my test list was incorrect.

Simpler still would be a resistor...... 73, Don N2VGU

If you're not worried yet, I'll bet this traveler's tale will do it. I had a business trip to Fiji last year so bought a power plug adaptor on Amazon to use my JA/US devices with the Australian large

Simple and possible. I like that. GREG Yahoo Mail: Search, Organize, Conquer On Sun, Nov 17, 2024 at 5:41 PM, Nick Garrod via groups.io<gw6jhk@...> wrote: An even simpler solution

Thank you.Noted. I'm also considering just adding a 2.1 barrel jack on the rear end cover ( same end as the proposed fan ) and then feeding the 5V in from an extra port on my INIU power bank via a USB

Such receive errors could potentially also come from open or crossed connections on your trifilar transformer T401, or similar issues on L401a/b.?? Open connections on these can creep in if the

Roger Wilco!! :)? GREG KI4NVX? Yahoo Mail: Search, Organize, Conquer