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QMX+ Build - T401 Question

Jim Bennett / K7TXA All Messages By This Member #124533 I'm at the building stage where I install T401, the trifilar transformer. With it out of the board, I've identified that A-A, B-B, and C-C connections are good, and no A-B, A-C, etc. I slid the transformer into the correct holes and soldered one wire in place. When I went back and re-tested to ensure that I matched them up properly, I also see zero resistance (a beep on the multimeter) between a couple of them, not just aa bb cc. Is this a problem, or is this happening due to the way those connection points are routed on the board to/through other components? -- Jim / K7TXA Eagle, ID SKCC 10447T BUG 301
Jim Bennett / K7TXA All Messages By This Member #124534 I had searched messages before but missed one that is related, one between N8EU and BD8BTE. Looks like I may be OK, as I'm seeing the same thing that N8EU saw. Might be a good thing to note in future versions of the assembly manual so that bozos like me don't over think the process! :-) -- Jim / K7TXA Eagle, ID SKCC 10447T BUG 301
Mike Krieger All Messages By This Member #124536 I am pretty sure it is normal. I found the same readings. I removed T401 before soldering and it tested ok so I reinstalled it and moved on. The next day I finished the build. I then looked everything over ?and proceeded to a successful firmware download. The xcvr. Is working FB on all bands. My first QSO was Michigan to Colorado 539.? Mike Krieger toggle quoted message Show quoted text On Wed, Jun 19, 2024 at 7:16?PM Jim Bennett / K7TXA via <w6jhb=[email protected]> wrote: I'm at the building stage where I install T401, the trifilar transformer. With it out of the board, I've identified that A-A, B-B, and C-C connections are good, and no A-B, A-C, etc. I slid the transformer into the correct holes and soldered one wire in place. When I went back and re-tested to ensure that I matched them up properly, I also see zero resistance (a beep on the multimeter) between a couple of them, not just aa bb cc. Is this a problem, or is this happening due to the way those connection points are routed on the board to/through other components? -- Jim / K7TXA Eagle, ID SKCC 10447T BUG 301

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