[LAD] A little quiz about audio measurements...

[Gene Heskett]

On Saturday 29 May 2010, Veronica Merryfield wrote:
>> Regarding to station clocks I guess they are synced by radio and not by
>> the power line. In Parma there the clocks might be heritage-protected ;)
>> and stills synced by the power line frequency.
>
>The ones I have visited have two clocks, one on the power line and one
> atomical. The control systems have the same thing, so they say, but when
> talking through the running of the station it seemed much of that sort of
> control is manual.
>
>The significance here, I was surprised to see 100.0hz if it was mains
> bourn.
>
That is because the 50hz is full wave rectified, becoming 100hz and 
harmonics thereof because that waveform is not a sin wave.
>Vrnc
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-- 
Cheers, Gene
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