I inspected the LED lamp and saw a small burned spot.
saw something similar with a CFL bulb a few years ago....huge s9++ buzz from
LF through to low HF. I could hear it all over the neighborhood with a
portable SW receiver so... and after several days of DFing and making noise
maps of the local area, I traced it to a cottage four doors away. The
cottage was vacated as the owners just come here in the summer but I
eventually got access from a relative. It was a CFL light left on in the
crawlspace (to discourage some of our local otter population from moving
in!) but ... it had burned out and partially melted the glass, with a lot of
black charring on the base. A very dangerous situation if there had been any
flammable material nearby. Even in this burned-out state, is was generating
some serious RF it seems.
Steve
WEB - "The VE7SL Radio Notebook": http://members.shaw.ca/ve7sl
VE7SL BLOG - "Homebrewing and Operating Adventures From 2200m to Nanowaves":
http://ve7sl.blogspot.ca/
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