Gary,
This evening I set about doing the grounding to the mic socket as you
suggested. I got down on 80m this evening and I am told the transmit
audio is as good as anything any of other radios. No fuzzyiness,
distortion, crackling or nasally sound.
I am pretty happy that this issue which has been plaguing me since I
attached the KPA100 over a year ago appears to have been resolved. I
will test other bands tomorrow to make sure all is well on those also.
Many... many... many thanks. I appreciate your advise enormously.
Regards,
Dave
VK2NA
Gary Surrency wrote:
Hi David,
<SNIP>
Is the mic connector grounded? If not already done, the mic connector
should be grounded. I do this by removing the left side panel and
scraping away enough green solder mask right next to the threaded part
of the connector so that I can solder it directly to the PCB ground
plane. If you remove the PCB coating about 1/4 of the way around the
threaded portion of the mic shell, it’s enough to allow a good
soldered connection. A tiny jewelers screwdriver works well for
removing the resist. Use the side of a soldering iron tip and enough
heat to get the shell hot enough to take solder and then apply solder
between the PCB and the bottom edge of the connector shell. Cool the
threaded mic connector with a damp rag or sponge when done, so you
don't burn yourself on the hot connector.
Also check your station ground for problems, the coax cables, etc.
<SNIP>
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