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04-12-2011, 1:24 PM
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Originally Posted by
If I use an AM radio to track the interference, how do I determine which direction the internal AM radio aerial is pointing?
Usually the ferrite rod aerial is positioned along the top of the radio.
The aerial has its minmum pickup off the ends, therefore if you rotate the radio until you are getting the least signal and then one end of the radio should be pointing towards the source, so that will give you two possible directions.
Hopefully, moving to somewhere else, you can repeat the exercise and get a second direction from there. Where the two lines cross should give a rough indication of the source.
Trouble is that, if it is within the building, the signals could be confused by re-radiation from metal objects like wiring.
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