[time-nuts] GPS disciplined mechanical clocks

Magnus Danielson magnus at rubidium.dyndns.org
Tue Mar 10 18:49:53 UTC 2009


Jim,

Jim Palfreyman skrev:
> Excellent.
> 
> I shall get the observatory to move their hydrogen masers onto a board on
> drink cans immediately.

If you detune the Q value of them you can make it work. :)

Cheers,
Magnus - do notice the smiley, it's there for a reason

> Jim
> 
> 2009/3/10 Max Robinson <max at maxsmusicplace.com>
> 
>> Hal Murray wrote.
>>
>> Sounds like good science fair bait.  Are there similar demos?  Can you get
>> two tuning forks to beat if held next to each other but get in sync if
>> their
>> bases are touching?  (or something like that)
>>
>> Yes.  That's a standard sophomore physics demonstration.
>>
>> Regards.
>>
>> Max.  K 4 O D S.
>>
>> Email: max at maxsmusicplace.com
>>
>> Transistor site http://www.funwithtransistors.net
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>>
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>>
>> ----- Original Message -----
>> From: "Hal Murray" <hmurray at megapathdsl.net>
>> To: "Discussion of precise time and frequency measurement"
>> <time-nuts at febo.com>
>> Sent: Monday, March 09, 2009 2:27 AM
>> Subject: Re: [time-nuts] GPS disciplined mechanical clocks
>>
>>
>>>> Allied to this discussion is the Loomis effect, discovered by the
>>>> American millionaire who had three Shortt clocks running in his
>>>> basement. They synchronised unless aligned at 120 degrees to each
>>>> other. I wonder weather they were shaking the bedrock, or maybe the
>>>> gravitational attraction between the 10 kg pendulums may have
>>>> synchronised them.   (See "Tuxedo Park" by Jennet Conant) He qualified
>>>> as the first time nut.
>>> It's on page 67-68.
>>>
>>> When I told that story to a friend today, he gave me one back.
>>>
>>> If you take 3 old fashioned mechanical metronomes and put them on a board
>>> that is on a couple of soft drink cans for rollers, they will get in
>> sync.
>>> It may take an hour...
>>>
>>> Sounds like good science fair bait.  Are there similar demos?  Can you
>> get
>>> two tuning forks to beat if held next to each other but get in sync if
>>> their
>>> bases are touching?  (or something like that)
>>>
>>>
>>> --
>>> These are my opinions, not necessarily my employer's.  I hate spam.
>>>
>>>
>>>
>>>
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>>>
>>
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