On Fri,2/5/2016 6:52 PM, Tony wrote:
All:
I've had an RFI issue coming from a specific direction for several
years. It's a unique noise that appears on several HF bands which is
usually a couple of S-units above the noise i.e., just enough to cover
weak signals in that direction.
I thought I could use a VHF / UHF radio to pinpoint the source, but
I'm not able to hear it on my all-mode VHF/UHF home station with Yagi
antennas.
The ideal setup might be a portable HF radio which can tune the same
frequencies that are susceptible to the noise. Something small enough
to carry and use with a portable HF loop.
I was thinking about a Kenwood TH-F6A that has HF SSB / CW coverage,
but I'm told the receiver isn't very sensitive; even with an external
antenna.
I'm the source of that comment about the TH-F6A. I find it useful when
I'm very close to the source; a more sensitive RX is useful to get you
close. The Tecsun PL660 and PL880 are pretty sensitive, cover LF, MF,
and HF, FM broadcast, and the AM aeronautical band above the FM band.
Quite useful.
Both the TH-F6A and Kenwood TM-V71A (the VHF/UHF mobile rig) have lots
of memories that can be programmed from a computer serial port. I own
both, and have both programmed for AM around 160 MHz, 300 MHz, 400 MHz,
and 550 MHz. I search for power line noise by driving around monitoring
160 MHz, then switch to the higher frequencies when I get close. Then I
get out of the car with the talkie; holding it close to my chest to make
it directional. This method does NOT work for electronic noise.
BTW -- does the Archive Search function no longer work on this
reflector? ALL of this has been posted several times.
73, Jim K9YC
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