William, I suspect you had an attachment
stripped by the reflector. Was it a sound
file or spectrum view?
Ron, does the RFI occur only on 17M?
I presume you've checked other bands?
The switch-mode power conversion
in PV inverters can generate RFI
across a broad spectrum, but it would
be unusual
William,
Very similar.
73s
Ron
-Original Message-
From: William Hammond
Sent: Monday, April 18, 2022 22:04 PM
To: Ron Bell
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Interference on 17M
Is it anything like this?
Hi,
See:
https://www.nk7z.net/rfi-now-house-cleaning/
I has similar issues, and solved them via the process described on my
web page.
That is Part two of a three part article on removing RFI, and
understanding your RF environment. This part covers self induced RFI,
which is what I suspect
Band specific problems are nearly always the result of common mode RFI
(RF on the feedline/rig/CAT cable). Start by testing into a dummy load
or with QRP (<5W) output. After that, use the normal common mode
elimination measures, quality chokes at the antenna feedpoint(s),
bonding all of the
Dear OMs and YLs,PV Panel noise does not necessarily go away at night. I
have an installation at a neighbours and it generates noise 24 hours a day.
Filters and ferrites have largely solved the problem but it was an expensive
enough effort. Good luck, we are all in for it.I paid as my
In solar (PV) systems, Inverters, Charge Controllers and associated cabling are
the prime suspects. There is a lot of info on the internet, and some of it is
pretty good.
Shielding can be effective, but the real problem is that the FCC has seen fit
to exempt solar systems from most Part 15
If you disabled Serial Enumeration and Modem Control at Startup, as shown
by screenshots in this document:
https://bit.ly/FTDItip
but the rig still keys when you connect the USB cable or turn on the PC,
then you may need to do it again, especially if the cable was moved to a
different USB port
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