[time-nuts] 60 Hz measurement party

[Alberto di Bene]

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