"Ron Hardin" wrote in message
...
Gary Schnabl wrote:
It was probably either E or W pretty close, just from taking a portable
radio
outside and nulling the het without nulling WFAN (WFAN is also nearly
east).

I'm sure I have a recording, ...

http://rhhardin.home.mindspring.com/het.ram (9 seconds at 5:28am)

It was startlingly strong, but then so is WFAN in Ohio.

I got rid of it with antenna null steering and 3 cascaded notch filters,
and didn't experiment much with the real equiptment after that; just a
portable
radio in the yard while the recording went on inside.

My impression was that it faded later but I wasn't listening continuously
to it.
Fading would suggest it's not local. If it's there Friday I'll try to
record
it on its own (rather than suppressing it).

380 Hz would seem to rule out any BC station. Sounds like what someone might
do in my immediate neighborhood when I was in HS over 40 years ago - Putting
500 W AM on 840 into an end-fed 200 ft antenna and wiping out WHAS reception
in Milwaukee. Could be a pirate w/o any programming. A little power goes a
long way on 660.

QSB could occur when a low horizontal antenna with high vertical angles of
radiation clash with the ground wave. So the source might be fairly close.
Especially near dawn or sunset.