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
    Name or NavList Code:
    Email:
       
    Reply
    Re: How Many Chronometers?
    From: Gary LaPook
    Date: 2009 Sep 20, 12:11 -0700

    I considered that too and I also suspect that such a small heater could 
    be made today with solid state controller that would use just a small 
    amount of electricity but I wanted to keep it simple, using things 
    normally available.
    
    gl
    
    
    Philip wrote:
    > Since it has already been discovered by the list that it is easier to
    > maintain temperatures above ambient, eg. crystal heaters in HF radios,
    > than below, i would suggest a small well insulated box with a
    > thermostatically controlled heater (one or two watts, 12-15v DC?). The
    > Watch could be viewed through a double or triple insulated glass window
    > so as to not disturb the thermal equilibrium.  This would be a nice
    > project not beyond the capabilities of many of us. A couple of LED's to
    > indicate operating temperature and power on and it would be a nice piece
    > of kit to have at the nav station.
    > Philip
    >
    >
    >
    > , 2009-09-20 at 01:40 -0700, Gary LaPook wrote:
    >   
    >> So, if the cabin can't be maintained at around 25ºC then an alternate
    >> way to stabilize the watches can be utilized. Simply buy a small
    >> cooler and put the watches and some ice in it and establish their
    >> rates at this cooler temperature, they should be running slow. 
    >>     
    
    
    --~--~---------~--~----~------------~-------~--~----~
    NavList message boards: www.fer3.com/arc
    Or post by email to: NavList@fer3.com
    To , email NavList-@fer3.com
    -~----------~----~----~----~------~----~------~--~---
    
    

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Get a NavList ID Code

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

    A NavList ID Code guarantees your identity in NavList posts and allows faster posting of messages.

    Retrieve a NavList ID Code

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

    Email Settings

    NavList ID 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