http://www.leapsecond.com/time-nuts.htm http://www.leapsecond.com/time-nuts.htm Any time we fix an old radio that goes down to 60 Khz, I always have to see if

http://www.leapsecond.com/time-nuts.htm http://www.leapsecond.com/time-nuts.htm Any time we fix an old radio that goes down to 60 Khz, I always have to see if WWVB is coming in loud enough to be heard.