ORIGINAL: Capt Jim
Apparently, from what little I hear locally, they are being employed in an attempt to reduce ignition interference from gasoline motors, and also to protect against unwanted signals coming from other radio equipment, possibly used in heavy earth moving machinery, operating in the vicinity. Is this a realstic approach to these problems, or simply a well intentioned but misdirected application?
Thanks to all who have responded.
Jim
Who knows? No one seems to want to run accurate tests.
The best way to protect from ignition noise is shielding at the source.
I don't see how they could protect from outside interference unless you put them on the antenna - and that sure would not be a wise thing to do.