AVS Special Member
Join Date: Jan 2000
Location: Salt Lake City, UT, USA
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Is the train electric? Try listening with an AM Radio tuned to one end or the other of the band, and see if you get buzzing or other noise.
Here in SLC, we have light rail trains, that use about 700 volts DC at some un-godly amperage (it's like, 100+ amps when running, and 900 amps when braking). They make a "zipper" sort of noise on a radio.
About all you can do is try to get the antenna away from the noise source, block the noise source from the antenna, or use an antenna with more gain (which is a "more focused" pattern to aim away from the noise source).
Ken English, Sr. Engineer, KSL-TV.
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