Re: [time-nuts] How good are mechanical watches

On Sat, 21 Apr 2007 08:37:10 -0700, "Tom Van Baak" <[EMAIL PROTECTED]> wrote: >That's how I measured the performance of a WWVB radio >controlled watch: > >http://www.leapsecond.com/pages/Junghans/ > >This is a great example of "sawtooth" that you probably >haven't seen before. Hey, that's a

Re: [time-nuts] How good are mechanical watches

>> See ADEV of a Hamilton M21 Ship's Chronometer: >> >> http://www.leapsecond.com/pages/m21/ > > I'm curious -- how did you pull the data? > > My first guess would be a microphone to pick up the ticks, followed by a > little dsp... > > John I mostly use Bryan Mumford's "MicroSet timer" whi

Re: [time-nuts] How good are mechanical watches

John Pettitt wrote: > Thomas A. Frank wrote: > My Brietling Navitimer is good for about a second a day when it's clean > - it degrades over time (about 5 years) to about 20 seconds a day then I > pay $$$ to have it cleaned and lubed and it's back at at a second a day > for a couple of years bef

Re: [time-nuts] How good are mechanical watches

On 4/21/07, John Pettitt <[EMAIL PROTECTED]> wrote: > I still love > it and occasionally use the circular slide rules to the amazement of > anybody under 45 (my class in the UK was the last high school class to > use slide rules and I had to use a circular one for my pilots license). I used an E-6

Re: [time-nuts] How good are mechanical watches

Tom Van Baak said the following on 04/21/2007 01:14 AM: > See ADEV of a Hamilton M21 Ship's Chronometer: > > http://www.leapsecond.com/pages/m21/ I'm curious -- how did you pull the data? My first guess would be a microphone to pick up the ticks, followed by a little dsp... John __

Re: [time-nuts] How good are mechanical watches

I tried to use a watch sized e6b only once. (No autopilot!) Good for unusual attitude practice. Norm n3ykf ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

Re: [time-nuts] How good are mechanical watches

On 4/20/07, Hal Murray <[EMAIL PROTECTED]> wrote: > Speaking of mechanical watches... ... > Does anybody make good ones anymore? Is there a good web page on this area? http://www.nawcc.org/ http://www.timezone.com/ ___ time-nuts mailing list time-nuts@

Re: [time-nuts] How good are mechanical watches

See ADEV of a Hamilton M21 Ship's Chronometer: http://www.leapsecond.com/pages/m21/ /tvb ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

Re: [time-nuts] How good are mechanical watches

Thomas A. Frank wrote: > On Apr 20, 2007, at 5:28 PM, Hal Murray wrote: > > >>> John (who still wears a mechanical watch) >>> >> Speaking of mechanical watches... >> >> Does anybody make good ones anymore? >> > > > Define "good". > > For wrist watches, if you mean fairly accurate (bl

Re: [time-nuts] How good are mechanical watches

On Apr 20, 2007, at 5:28 PM, Hal Murray wrote: >> John (who still wears a mechanical watch) > > Speaking of mechanical watches... > > Does anybody make good ones anymore? Define "good". For wrist watches, if you mean fairly accurate (blasphemy here to suggest only fairly, I know), yes, there a

Re: [time-nuts] How good are mechanical watches

I still have my Bulova Accutron ... Dick S. Hal Murray wrote: >> John (who still wears a mechanical watch) > > Speaking of mechanical watches... > > Does anybody make good ones anymore? Is there a good web page on this area? > > Many many ago, a friend showed me his new toy, an accurate pocke

Re: [time-nuts] How good are mechanical watches

From: "Dave Brown" <[EMAIL PROTECTED]> Subject: Re: [time-nuts] How good are mechanical watches Date: Sat, 21 Apr 2007 10:12:32 +1200 Message-ID: <[EMAIL PROTECTED]> > > - Original Message - > From: "Hal Murray" <[EMAIL PROTECTED]>

Re: [time-nuts] How good are mechanical watches

On Sat, Apr 21, 2007 at 10:12:32AM +1200, Dave Brown wrote: > Still have my father's Waltham. Hamilton and Elgin were fairly > popular watches in railway circles as well. > Used to see ads for Hamilton in the National Geographic- wy back! > No idea if any of these are still being made-I think

Re: [time-nuts] How good are mechanical watches

- Original Message - From: "Hal Murray" <[EMAIL PROTECTED]> To: "Discussion of precise time and frequency measurement" Sent: Saturday, April 21, 2007 9:28 AM Subject: [time-nuts] How good are mechanical watches >> John (who still wears a mechanical w

[time-nuts] How good are mechanical watches

> John (who still wears a mechanical watch) Speaking of mechanical watches... Does anybody make good ones anymore? Is there a good web page on this area? Many many ago, a friend showed me his new toy, an accurate pocket watch. I forget the brand. I think he said it was from the railroad days