Hi Dan - I would take this as a learning exercise and let Jeff
Moore be the teacher. His repair prices are fair, he tells you all
the errors found and repairs the unit quickly to working condition
if possible. It hopefully is cheaper and probably faster than even
a new kit unit. Email him at his QRZ address. - A grateful former
customer, Sandy KB3EOF
On 7/20/24 19:11, dan.kerrigan via
groups.io wrote:
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I recently purchased a QMX+ kit and soon started following
this group. I finished my kit today but I'm having a couple of
issues after kit completion and I'm hoping to get some ideas.
I've nearly resigned myself to purchasing another kit and
starting over due to at least one error I know I've made. The
unit powers on and I was able to flash the firmware without
trouble. Hardware diagnostics in the terminal look OK.
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1. When plugging in headphones, the volume is static at full
volume and the volume control seems to do nothing at all.
2. When tuning around, connected to a known working antenna,
no s-meter changes can be seen.
3. The terminal apps Audio filter sweep, RF filter sweep, and
Test ADC I/Q never start.
4. SWR pretty much shows 10s. LPF sweep isn't pegged but I'm
not sure to look for exactly either.
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Mistakes I've made:
- I had trouble soldering the heavier gauge wire enamel wire
for the B&C connections on the SWR bridge. In a moment of
poor judgement, I think I vaporized the pad on the bottom of the
board using too much heat. In desperation, I soldered the wires
from the top of the board. Given that I had no trouble doing
that, I now think I didn't enough enamel scraped off and the
additional heat led to the problem.
- My soldering skills are not stellar yet and I'm only
somewhat confident my other joints don't have issues.
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Any advice on what to look for would be greatly appreciated!
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Thank you,
Dan Kerrigan
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