[Elecraft] One more re:Atomic Clocks

[Ed Long]

All,

I think those clocks only update the time from Boulder 4 times per day. At least my Radio Shack ones do that - you can tell by watching the antenna symbol to show when they're seeking the signal. So if they are a few seconds off during the interim because they are running at slightly different oscillator rates, I would think that's kind of normal. I think the advertised accuracy of "1 second per thousand years" or whatever is not quite correct. But 4 times per day they should be within milliseconds! Ever try listening to WWV and watching the clock at the same time? (Can you tell I need to get a life?)

73,

Ed Long
WA4SWJ

(sorry for the off-topic post)
  ----- Original Message ----- 
  From: Fred Jensen<mailto:k6dgw at foothill.net> 
  To: Elecraft Reflector<mailto:elecraft at mailman.qth.net> 
  Sent: Thursday, October 14, 2004 1:23 PM
  Subject: Re: [Elecraft] One more re:Atomic Clocks


  Well ... maybe ...  but majorities don't always determine the truth (we
  all probably knew that ;-).  I volunteer at the local blood center where
  there are four atomic clocks -- two Seiko, and two other different ones
  I've never heard of.  They are all different, all the time, sometimes by
  as much as 10 seconds.  The purpose originally was to synchronize the
  times recorded during a blood donation (required by the FDA which
  regulates blood centers). I suggested only one clock in the place. 
  They're thinking about it.

  Fred K6DGW
  Auburn CA CM98

  Charles Greene wrote:
  > 
  > Joe,
  > 
  > Right.  You need to buy three, and the majority wins.
  > 
  > At 08:23 PM 10/13/2004, Joe - aa4nn wrote:
  > >Whatever you'all do, don't buy TWO atomic clocks.  Otherwise you'll never
  > >know what time it is.  I have two MFJ Radio Controlled clocks that after
  > >two years have finally synced in with UTC but even now they are two
  > >seconds apart.  Go figger.  You can manually set the Hours on these clocks
  > >but not the minutes & seconds.
  > >73, Joe, aa4nn
  > 
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