[time-nuts] Time nut newbie
lists at lazygranch.com
lists at lazygranch.com
Tue Apr 30 23:18:53 UTC 2013
A bit OT, but back in the day there was what amounted to an X-prize for a real accurate chronometer for navigation.
Make that way back in the day.
http://en.m.wikipedia.org/wiki/John_Harrison
Somehow I suspect everyone knows this story. ;-)
-----Original Message-----
From: "Tim Bastian"<n714x at yahoo.com>
Sender: time-nuts-bounces at febo.com
Date: Tue, 30 Apr 2013 13:49:43
To: <time-nuts at febo.com>
Reply-To: Discussion of precise time and frequency measurement
<time-nuts at febo.com>
Subject: [time-nuts] Time nut newbie
Hi all,
I'm a time nut newbie. My obsession started with the search for an accurate chronometer to carry on my boat for celestial navigation. Yes there still are a few of us left that practice the art.
My current project is a quartz chronometer using a DS32Khz tcxo oscillator and two 74HC4060s (+ or- 10 seconds / year).
For my next project I'm looking at an Abricon Part Number AOCJY2-10.000MHZ ocxo 5 ppb running through a pic and using the algorithm posted on http://www.romanblack.com/one_sec.htm. I'm shooting for + or - 1 seconds / year.
Is there an archive of old posts that might be helpful in answering some of my questions and for getting ideas.
Thanks,
Tim KK4FQB
Sent from my Motorola ATRIX™ 4G on AT&T
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