On 16/09/2018 10:57, Le_Forgeron wrote:
> Le 16/09/2018 à 10:54, Stephen a écrit :
>> On 16/09/2018 02:16, Cousin Ricky wrote:
>>>> I was surprised to learn that clocks still use the wall 60Hz for a
>>>> clock. Every clock ran 8 minutes a day fast. Even my coffee pot. I
>>>> figured it's a computer, it has a crystal.
>>>
>>> What???  That's quite an ASSumption on the part of the clock maker!  I
>>> can't imagine any such clocks would be any more than useless around here.
>>
>> Not an assumption at all. Until the 1980s a lot of electric clocks used
>> an AC synchronous motor. The early ones did not self start. You had to
>> spin the motor manually. I have one that uses a lever and ratchet to
>> start it. Others could be made to run backwards. They were accurate to
>> one ac cycle a day if your grid was half decent.
>> My pc clock is 1·9 seconds behind according to https://time.is
>>
>>
> 
> Earlier this year, in continental Europe, we add a small scandal about
> two countries playing bad with the grid: all the microwaves' clock were
> getting late, to the point of getting in the TV news of 13h and 20h !
> 
> The cumulated delta was about 20 minutes in April, IIRC, the assholes
> having pushed a 49,5Hz instead of 50Hz, in order to not provide the
> other with a better current, while pocketing the money...
> 


No wonder the Brexiteers have the sway, here. ;)


-- 

Regards
     Stephen

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