Tom Walker writes in a message to Nathan Bollinger
 TW> You have answered your Own question possabibly. IF you Know 
 TW> that there is NO data stream associated with WWV on 5,10,15, 
 TW> and 20 Mhz then by Default you Must picking up WWVB where there 
 TW> IS a Data stream.
But there *IS* a data stream on the shortwave stations too.  However, the 
clock probably uses WWVB anyway.
 
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