Jump to content
  • 0
Sign in to follow this  

Citizen 7803A Cosmotron Beat Error?


Hi all - I have a new (to me) Cosmotron that is running fine at +15 seconds a day (actually great, since it does that in all positions!) but I am curious about the apparent massive beat error: 7.6ms. Adjusting the hairspring stud (which on a mechanical watch would change this) does not affect this at all (maybe by 0.3 at most). I am content to leave well enough alone, but is this type of error normal on Cosmotrons? Or is the timer having difficulty listening to it? I have had issues with plastic watches (Siderals, Swatches, etc.) that have to be oriented differently due to plastic cases, so it would not be surprising if it's a timer issue.


Share this post

Link to post
Share on other sites

2 answers to this question

Recommended Posts

  • 0

I usually put the crown to the metal part on the Timegrapher. i don't know what kind of TG you have. So can't say how to put the watch. But even if it's a plastic case or a well enclosed case it works fine to put the crown to the metal which holds the case. 7,6 beat error sounds a lot. 7803A isn't that a electronic movement with balance? 

Share this post

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Answer this question...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

  • Recently Browsing

    No registered users viewing this page.

  • Topics

  • Posts

    • Welcome Loren. I am new to this group also, seems to be a great group, Mark.  
    • Thanks. Is this something I need zenith to do (that's sounding very expensive), or a capable watchmaker can handle? Sent from my SM-G970U1 using Tapatalk
    • Thanks watchweepole. I’ve looked for that video but no luck. If you have a link, it would be much appreciated my friend Sent from my iPhone using Tapatalk
    • Hello!  I know this is a watch forum, but I believe that clock questions are also welcomed, so based on that, I hope that someone can point me in the right direction, on my question : I have a wall clock ( not old - about 30 yrs ) which has a battery powered clock 'movement' . It has a powered pendulum and two different  1/4 hour  & hour chimes ( one is the Westminster chime ) which can be selected. Anyhow, the clock is of no antique value (obviously ) but is of sentimental value. For the past few months, the hands don't turn ( or do so, now and again, randomly ) and unless they cross the 15 min. / hour marks, there is no chime. The pendulum however continues doing it's thing. Now this clock was not expensive or of any big name and the hands / chime is a small  box / battery holder. I have looked online for a replacement, and have seen some very similar looking ones, but they don't have the chime ability ( electronic chime / speaker ) . I wonder if anyone knows if such a replacement unit is available, or what the search term is for it,  and where I might look for one?  Any help would be greatly appreciated. Thanks in advance.
    • Today it's the Benrus Citation electronic watch. I recently pulled this apart to clean it. It had a very tall battery in it and the hatch wasn't sealing so moisture was getting in and everything was beginning to stall. Next strap I buy, will be a replacement for this ugly thing.
  • Create New...