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I'm hoping someone can help point me in the right direction. Just completed a build of a mid-band QMX. Loaded firmware 19 just fine. No issues with the initial start up. RF sweeps can use some work but I think I need to address the SWR sweeps first. Into a dummy load (independently measured at 1.1:1 or better), none of the bands have sweeps with values below 3.0:1 and most are much higher. With the exception of 20 m, most are just a noisy mess. 20 m gradually slopes down to 3.0:1 from higher values as the freq climbs.?

I checked the continuity of the T507 windings before installing and again confirmed continuity between appropriate pads (not leads) after installing. But still...what else could it be? I'm not sure if the secondary windings are both wound in the same direction or not, or if they're supposed to be --perhaps someone could clarify that.?

I know it's been suggested that the sharp edges of the binocular core might abrade the wire enamel and cause a short between windings. Though I shaved the edges with a knife before starting (per Hans), who knows, maybe I still inadvertently stripped some enamel away and caused a short.?

So before I remove T507 and start over, I'm hoping one or more of you helpful souls would suggest some alternatives.?

Many thanks in advance.

Mitch NK3H