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Re: QMX+ Assembled, Updated, but ADC I/Q Most Tests seem Way Off #build #test #toroid #transformer #troubleshoot


 

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I can¡¯t claim to be an expert yet (just finished my own build today!) but have a few questions to help out where I can:
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  1. What do the other tests look like (you mentioned multiple tests not being good, but how and which ones?)
  2. Does it RX or TX as expected?
    1. For me, I had an issue with very low TX power that I traced to a bad solder joint on L502 and resoldering it resolved things
  3. You said ¡°two wires¡± but I assume you mean three¡­ for the trifilar winding.
I would be surprised if just tight winding caused a short¡­ but a bad solder joint or not-quite-melted enamel could certainly cause problems.
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My main suggestion would be to not use IQ debug too soon in the testing. I think it depends on lots of things working right before it will even give valid results. For example, if there is no TX power, it won¡¯t be sending much signal in during the test (your values seem much smaller than what I get on mine)"


By TX, I think you mean to go to the Diagnostics screen and press "T"? Power shows as 0.0 W across all bands. SWR is about 1.2 across all bands.?

Per your comments, I'm going to check L502 T501 and T507...?

Thank you MUCH!

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