[time-nuts] Watches

Daun Yeagley daun at yeagley.net
Tue Dec 4 03:29:30 UTC 2007


Hi Didier
I agree with Chuck.  I keep my Accutron on a nightstand beside my bed, and even
with my bad ear, I can hear it humming away!   The one year life for a battery
is about right too.
Mercury cells were what they were designed to run on, and since those are no
longer available, silver oxide cells are used as replacements.  Since the
voltage on these is higher, it drives the tuning fork harder and not only are
they louder, but they need to be "re-phased" so that they index correctly with
the increased amplitude.  This has been a topic of much discussion in Accutron
circles!

Daun 

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On Behalf
Of Chuck Harris
Sent: Monday, December 03, 2007 10:08 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Watches

Hi Didier,

I would bet that it still works, and he couldn't get
mercury cells to power it with anymore.  Accutrons eat cells
for lunch.  You get 1 year and not much more.  Remember the
one transistor oscillator is cranking 24/7, and the hum is
audible if the watch sits on any kind of sounding board.

I'd be happy to help.

-Chuck Harris

Didier Juges wrote:
> Chuck,
> 
> My dad has one of the original tuning fork Accutron. I know he stopped
> wearing it a while back, but I am not sure why. I will ask him if he still
> has it and if it works and in case he does, I would like to go back to you
> for more information in order to make it work again, if that's OK. 
> 
> Thanks in advance,

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