Welcome to the NavList Message Boards.

NavList:

A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    or...
       
    Reply
    Re: Bezel on deckwatch
    From: Christian Scheele
    Date: 2014 Nov 28, 10:15 -0800

    Sean,

    not sure how practicable this is, but if you need a sidereal clock, then replacing the crystal in a quartz-movement clock keeping solar mean time might be an idea. A second of UT1 equals 1.002737909 seconds mean sidereal time. The crystal used in a solar time clock oscillates at 327680 Hz, multiplying that by the conversion rate to get from solar to sidereal units equals the period of 32857.7 Hz for the required crystal. There remains the matter of finding a supplier who will agree to sell one 1 unit only and arranging to have the crystal replaced. The mechanical route is a different story altogether, perhaps easier, if more expensive.

    Your crowdsourcing idea is great - thanks.

    Regards

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join NavList

    Name:
    (please, no nicknames or handles)
    Email:
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.
    Email:

    Email Settings

    Posting Code:

    Custom Index

    Subject:
    Author:
    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site