[GreenKeys] Frequency deviations in Continental Europe including impact on electric clocks steered by frequency

[Duncan Brown]

One of the problems with pendulum clocks was temperature stability - the 
length of the pendulum changes with temperature! This was addressed by 
adding temperature compensation to the pendulum.

Duncan
K2OEQ

On 06-Mar-18 11:41, Bob kb8tq wrote:
> Hi
>
> Consider that the clock in question *could* be one of these:
>
> http://www.simonsdialogs.com/2016/09/a-precision-pendulum-clock-and-an-even-more-precise-time-interval-counter/
>
> They are quite a step up from what most of us think of when a pendulum 
> clock is discussed. Still
> something that “grandfather” might have owned and used for years and 
> years. There are even
> better versions out there. Running the vacuum pumps on them gets a bit 
> noisy though ….
>
> Bob
>
>> On Mar 6, 2018, at 11:12 AM, Nick <creativegardening at hotmail.com 
>> <mailto:creativegardening at hotmail.com>> wrote:
>>
>> Hi Tony,
>>
>> Wow, somebody was setting that particular pendulum very accurate. It 
>> is not easy to do (I think), pretty impressive! I tried and tried - 
>> the closest I came up with was one minute of every day - and that's 
>> pretty bad. Maybe may hands are not that steady at all :-(
>>
>> Nick  -  N0NCQ
>> i-Telex  212503
>>
>>
>>
>> Sent from my T-Mobile 4G LTE Device
>>
>>
>> -------- Original message --------
>> From: "tony.podrasky" <tony.podrasky at gmail.com 
>> <mailto:tony.podrasky at gmail.com>>
>> Date: 3/6/18 11:02 AM (GMT-05:00)
>> To: GreenKeys at mailman.qth.net <mailto:GreenKeys at mailman.qth.net>
>> Subject: Re: [GreenKeys] Frequency deviations in Continental Europe 
>> including impact on electric clocks steered by frequency
>>
>> Hey Nick;
>>
>> WHY?
>>
>> My Grand Father's clock is accurate to a second a week.
>>
>> UE,
>> K2EAA - TONY
>> NNNN
>> ZCZC
>>
>>
>> On 03/06/2018 07:55 AM, Nick wrote:
>> > I have one of these WU self-winding clocks from the 40's or 50's in my
>> > shack. It's a very big clock in an oak case. Because a pendulum clock
>> > will never run accurat,
>> >
>> > Nick  -  N0NCQ
>> > i-Telex  212503
>> >
>>
>> -- 
>> Einstein on problem solving:
>> "We can't solve problems by using the same kind
>>   of thinking we used when we created them."
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