I did a similar thing years ago to prove to the power company engineer that the noise I was experiencing was from the power line. I used a dual trace scope, synced on channel 1 that was taking a sample of the AC socket in the building and put channel 2 on the speaker leads of a scanner. I used the AM mode on the scanner. After he saw that the traces synced up exactly he had a crew replace an old insulator and tie wire in front of my house that was causing microspark interference on the 2 meter band.
73, Joe, K1ike Burt Lang wrote: > I have found a simple way to verify if noise is coming from a power line > arc-over. Any such noise generated by a power line will only occur as > the voltage on the line approaches peak and it will be synchronized to > 120 Hz. Put an oscilloscope on the audio while feeding an unmodulated >
