Hi-band problem: low power, high SWR

[ah6cy]

This topic was presented earlier and I followed trouble shooting suggestions offered. But I am still having the same problem. I desoldered, rewound and resoldered T1 and T2 three times, each time reorienting wiring directions. ( By now my board looks pretty dirty, but connections and separations seem ok.). My output is 0.1W and SWR 9.99. I’d appreciate any advice or thought. I have built many kits and home-brewed many radios and devices, but this one just baffles me. I have a working low band (tr)uSDX and I used my Hi band main board with it (I reset it for Hi band) and the board works just fine. So the problem is definitely the Hi band LPF board.

[ah6cy]

Solved! The problem was a faulty FET (FDT86256) that came built in on the board. (I bought mine on AliExpress.) As soon as I replaced it with a new one I purchased from Mouser, my (tr)uSDX worked as it should. I now have a few extra FDT86256s. Contact me off-line if you need one. I am OK on QRZ.com.