Hello fellow QRPers,

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I am enjoying my QMX build, yet I’ve run into a snag on step 12 page 31 (the first specified continuity checks). I am hoping that someone has either seen/rectified a similar issue, or may have some tips on how I might move forward.?

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I’m attaching a screenshot that shows the results of the continuity checks, after installation of the larger binocular transformer, and after having gone back to really ensure that the enamel has been properly scraped off prior to completing the solder joints. As you can see in the image, there is a low resistance, approximately 10 ohms conductivity showing between A and B.?

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I have examined all of the other component connection points, and I’m not identifying any solder bridges, nor clippings, nor whiskers. As far as I can tell, my board doesn’t suffer any of the SMC bridges that have appeared on a few of the boards. I do plan to flip the orientation of D508 to make additional room for L508, but the polarity is already correct.?

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Any tips are appreciated!

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Thank you,

Garrett KC3UNP

开云体育

Hi Cliff,

I appreciate your having taken a look. B1 to B2 does indeed have continuity, as noted. The results for those checks were duplicated, and remain consistent from the first round of checks (through which there is a hand-drawn green strikeout in the image, since more enamel was removed from the solder joints at the transformer, before the checks were all performed again).

(and the image is actually directly out of Hans’s manual, with the numbering and results from my board added.)

Thanks again for any further ideas!
Garrett KC3UNP

开云体育