Welcome to the NavList Message Boards.


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

Compose Your Message

Add Images & Files
    Re: Dummy Batteries for an A12
    From: David Pike
    Date: 2021 Aug 15, 08:41 -0700

    Noell Wilson you wrote:  I was considering some dummy battery holders that would accept AA batteries instead of C type.  The C and AA batteries are the same length.

    A new Rayovac alkaline battery won't allow my A-12 bubble illumination assembly to be installed in the sextant and won't fit at all into the scale illumination assembly when using the fiberglass looking sleeve provided.

    I figure two of your broomstick dummies with a loose fit and a AA battery size hole through the center will solve several problems.

    I’m not sure what you mean.  I have no trouble with Duracell C batteries, which are available from eBay.  Perhaps Rayovac batteries are slightly wider.  I don’t see how you can get away from metal for the battery holder without going to a lot of trouble, because the metal forms part of the current path. 

    I don’t think the ‘light tube’ for the Vernier illuminator is very satisfactory although we must accept that it was probably designed for younger eyes than our own.  There are some excellent red ‘square patch’ led torches on the market running on only one AA battery.   They work well with my A12 although I could do with a third hand.  I think my next mod will be to incorporate a red surface mounted led into a small magnifying glass.  You can also shine one down the daylight hole at night.  In fact, they’re so bright that just shining a torch it up the battery hole is probably too much.  You’d need to experiment with stuck-on appertures and wrapping paper shim.  DaveP

    Browse Files

    Drop Files


    What is NavList?

    Join NavList

    (please, no nicknames or handles)
    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 Settings

    Posting Code:

    Custom Index

    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