Re: 73 clock

["Dave Hall" <dave@hallvw.clara.co.uk>]

<x-charset iso-8859-1>The 'electronics' are so minimal they almost certainly are never the
problem - just a transistor that is normally on but it switched off by back
emf induced by the pendulum as it moves over a very fine wire coil.
Mechanical or coil wire failures seem to be the normal failure mode for
these, and if lubrication doesn't do the trick, not a lot will.
Ingenuity allows a quartz movement to operate the hands if your clock is
beyond help.  It's the only way to make a broken black-face clock useful
again, but I've only done a lash-up, and certainly would want to play with
it further before publishing a method.

Dave.
UK VW Type 3 & 4 Club
http://www.hallvw.clara.co.uk/
------
----- Original Message -----
From: "Greg Merritt" <gregm@vwtype3.org>
To: <type3@vwtype3.org>
Sent: Wednesday, April 10, 2002 7:46 PM
Subject: re: 73 clock


>
> Like Mark said, the late ones aren't easily fixed like this.  The
> fix to which you refer only relates to the earlier clocks (with plastic
> rear covers).
>
> The early clocks are mechanical wind-up clocks with an electric
> solenoid that winds them up.  These have a little internal fuse that can
> go, and they'll wind again if you solder the junction.  (Well, these are
> *mid* clocks -- clocks that are earlier yet appear not to have the fuse,
> as is the case with a June 1963 clock I took apart two days ago.)
>
> Later clocks include electronic components, and fail in a
> different mode.  I haven't heard of one of these being diagnosed and
> repaird.
>
> -Greg
>
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>

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