Congratulations to John King for having the best frequency measurements during the November 2013 Frequency Measurement Test (FMT).  This ARRL sponsored event pits FMTers, across the nation against each other in an attempt to accurately measure the frequency of several transmitters located in various parts of the country.  John was able to measure frequency to 7 parts in a billion.  That’s an average error of 0.05 Hertz on the 40 meter band.

Mother nature plays a very important roll in the perceived frequency as various propagation effects cause the signal to appear on a different frequency.  Adjusting for those effects separates the true experts from the pretenders.