My engineer friend sent me an article that signals from outer space may have
been heard on 1420 MHz.
If you cannot identify the source, then it legitimately comes under the the
classification of unidentified radio source. Perhaps you should start a URS
website. Well, maybe the FCC already has. Perhaps they are covering up
these signals and stopped the use of 500 kHz because they were afraid radio
operators would identify the signals.
Or, the source may be a hangar in Nevada.
You can use a small handheld radio that tunes 500 kHz and walk around the
house. It sounds like it may be internal.
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