A simple way to measure the line frequency (up to a given precision...) is to watch on a waterfall program to one of its harmonics.
In the following picture you can see the 53rd harmonic of the 50 Hz line frequency in Italy. It was captured by just connecting a random length of wire to the line input of a sound card, thus capturing the ambient hum. More sophisticated ways can be used, of course.... :-) http://www.sdradio.eu/images/53x50hzita.jpg 73 Alberto I2PHD _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
