[time-nuts] Personal time keeping...
W4wj at aol.com
W4wj at aol.com
Sat May 21 04:48:30 UTC 2011
Many radio stations had at least one Western Union clock that generated a
tone at the top of the hour.
The clock was designed so that it ran just a slight bit fast. As the top
of the hour approached, the second hand would be held momentarily at 00
seconds,
then when the signal came down the line from Western Union, the second
hand was released and at the same time a relay was closed to produce the
hour "tone."
Good stuff...
73, Don, W4WJ
In a message dated 5/19/2011 11:21:20 A.M. Central Daylight Time,
max at maxsmusicplace.com writes:
Is anyone else old enough to remember when you would hear on the radio
"Time
at the tone, 5 o'clock. Beep." The tone was anywhere from half a second
to
one second long and it might have been hard to pin down if the beginning
or
the end of the tone was 5 o'clock but it was probably within a couple of
seconds accuracy which was plenty good for setting your watch or the
kitchen
clock. Why don't you hear that now a days? Digital TV has latency which
is
dependant on the equipment used by the cable or satellite company and is
somewhat variable between receiver manufacturers. The engineer of our
local
public radio station told me that digital radio has 7 seconds delay. When
I
asked the station manager if there were any plans to run studio time 7
seconds ahead of real time so listeners would get accurate time he just
frowned.
Regards.
Max. K 4 O D S.
Email: max at maxsmusicplace.com
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----- Original Message -----
From: "Steve Rooke" <sar10538 at gmail.com>
To: "Discussion of precise time and frequency measurement"
<time-nuts at febo.com>
Sent: Thursday, May 19, 2011 10:45 AM
Subject: Re: [time-nuts] Personal time keeping...
>A number of years back the London Science Museum used to sell an Einstein
> Relative Time Watch that just had the hours hand and was marked around
the
> dial, 1'ish, 2'ish, 3'ish, etc. I bought my ex one, don't know if she
> still
> has it. It's not the same as the new ones I have seen via Googling as I
> think this was much more fun.
>
> Steve
>
> On 20 May 2011 02:55, Burt I. Weiner <biwa at att.net> wrote:
>
>> Chuck,
>>
>> In another post I spoke about spending a few days with a fellow from
>> DATUM.
>> A lot of our idle chit-chat was about accuracy in timing and GPS
>> vs.other
>> off-air standards and propagation. He told me about his background in
>> the
>> military and precision measurements and about a watch he used to have
>> that
>> displayed in GPS seconds - fascinating stuffs. I noticed that he
wasn't
>> wearing a watch and I commented on that. He told me that he'd spent a
>> good
>> part of his life knowing precisely what time it was and still does the
>> same
>> thing in his work at DATUM. He then went on to comment that he was
tired
>> of
>> knowing exactly what time it was and he personally got sick of knowing
>> the
>> exact time. He also said that looking at the kitchen clock once a day
>> was
>> close enough for him, that it reduced the stress on him.
>>
>> Burt
>>
>> At 07:43 AM 5/19/2011, time-nuts-request at febo.com wrote
>>
>>> My personal preference is for highly jeweled totally mechanical
>>> automatic winding wristwatches. My hobby compels me to have
>>> high accuracy time and frequency around, but my life just
>>> doesn't run with that kind of precision.
>>>
>>> -Chuck Harris
>>>
>>
>> Burt I. Weiner Associates
>> Broadcast Technical Services
>> Glendale, California U.S.A.
>> biwa at att.net
>> www.biwa.cc
>> K6OQK
>>
>> _______________________________________________
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>
>
>
> --
> Steve Rooke - ZL3TUV & G8KVD
> The only reason for time is so that everything doesn't happen at once. -
> Einstein
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