On 08/07/2018 10:08 AM, Pat wrote:
On Mon, 6 Aug 2018 13:59:03 -0700 (PDT), Ed60062
wrote:

Recently the AM reception on my 2014 Dodge Caravan has been fading out when passing under overhead electric wires. FM is not a problem. Any ideas why this might be happening and what the solution might be?

Depending on your definition of "fading out", what you have described
is perfectly normal. The longer wavelengths of AM band signals have
trouble penetrating overpasses and under power lines. Most static is
AM in nature, so AM is highly susceptable to those symptoms. List to
the Steely Dan song "FM". "No static at all" is comparing FM to AM.
Back in the 60's, cars often only had AM radios, so having music other
than elavator music on FM was a huge improvement. You could drive
under power lines without your favorite song fading away.

Yes, FM has that advantage.
Apparently the idea of FM is about as old as AM, but AM used to be more
popular because the relevant circuits (in both transmitter and receiver)
were simpler. Important when the more tubes something depended on, the
less often it worked.

--
Mark Lloyd
http://notstupid.us/

"All religions are founded on the fear of the many and the cleverness of
the few." -- Marie Henri Beyle (Stendhal)