[time-nuts] 60hz disciplined watch (really?)

[Bruce Griffiths]

Robert Atkinson wrote:
> Hi,
> I think this is incorrect,
> 1/ My ecodrive that I bought in the USA does not run 20% slow here in the UK
> 2/What about incandesent lamps and those with inverters?
>    
As has been pointed out in an earlier post detecting the second harmonic 
modulation in the light output of an incandescent lamp powered by a 50Hz 
or 60Hz source is trivially easy, one can even detect it with an LED.
> 3/ even a cheap crysal is better than than the mains unless you average over days. They vary the frequency (phase) slightly to load share.
>   
> Robert G8RPI.
> --- On Wed, 20/4/11, Bill Hawkins<bill at iaxs.net>  wrote:
>
>
>    
Bruce