QDX rev 6 image freq problem

Jerry Gaffke All Messages By This Member #131342 If the problem occasionally changes: Try applying heat, cold, and mechanical pressure, this might localize the problem. Perhaps flex the board a bit (but not too much!), this might show if it's a bad solder joint or open trace. ? Jerry, KE7ER ? ? On Mon, Oct 14, 2024 at 04:09 AM, Fredrik (OH1HSN) wrote: toggle quoted message Show quoted text Frustratingly, once while testing I got a good result on the image rejection test, then it got back to the old behavior of no image rejection and the left channel being silent.
Fredrik (OH1HSN) All Messages By This Member #131346 Thanks Jerry, good advice. I tried heating and wiggling while watching the audio on a soundcard scope. No sign of life in the left channel. And as I measured good signals/voltages on the ADC chip pins themselves, I'm not too hopeful of finding loose connections anymore. ?

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