After doing a whole house shutdown I've identified our LG electric range
(LDE3017ST) as the culprit producing strong RFI on 80m across the whole
band. My antennas are 100ft or more away from the house so this isn't
subtle. This is not causing a similar pattern on 160m.
This range was produced in 2013 and came with the house we recently
purchased. It has a touch panel which likely is the source of the problem.
I'll need to have my wife play with the "buttons" while I'm listening to
see if there is anything obvious.
Short term cure is to flip the breaker in the electric service panel when
operating on 80m unless there is a kit for RFI. I'm not going to attempt a
home-brew repair on something like this.
As expected calls to LG haven't produced any useful response yet. If they
come up with a kit I'll report. We're planning a complete kitchen remodel
so this range won't last more than 6 months anyway.
Picture attached but may not make it thru the list. The strong ocean waves
every 200khz or so are from the range. The finer grained stuff isn't coming
from our house and will require some DF work. I've sent the pic to Dave,
NK7Z for his compendium.
EDIT: I've since discovered that an alternative to switching power at the
breaker panel is to turn on the bottom oven. The result of doing so
completely knocks down the RFI signature. The upper over has some effect,
burners seem to have no effect.
73
jim ab3cv
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