We are all constantly trying to root out the source of
"noisemakers" when listening. The most obvious ones, like fluorescent
lights, etc. are well-known. Well, you can buy in any hardware store or
home center a device that screws directly into the socket base of any
metal-bodied lamp, thereby turning it into a "touch" lamp. Very
convienient. But I discovered today that they are a nasty noisemaker in
AM or SW listening.
In this particular case, the lamp was about 14' from the antenna (in the
room I noticed it), and I don't know over what range that effect would
be noted, but probably anywhere in the house. As the subject line says,
probably old news to most readers here, but may be helpful to newer
listeners still trying to track down noise sources.

Rheostats are also notorious noisemakers, and the principal behind
the two devices is basically the same. For what it may be worth to newbies.

Tony

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