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Re: [T3] red needle clock


On 11 Apr 2002, at 3:09, Greg Merritt wrote:

> 	I then moved on to soldering a 12v solenoid's blown fuse.  Thanks
> for the tip, Jim, of just remelting the existing solder.  When I'd made a
> similar repair to another clock a number of years back, I actually
> soldered a wire between the fuse contacts.

I actually use a dab of flux to help the old solder flow.

The most common time for this "fuse" to blow is when a car is left in storage 
with the battery slowly running down. Eventually there is not enough umph in 
the battery to pull the solenoid closed, so the solenoid is a short across the 
battery and draws a lot of current. A wire there would disable the fuse and 
probably end up destroying the clock, or worse.

> p.s.:  Mark, the little +/- speed adjuster shaft actually rubs against a
> little plate with a curved edge; it rotates the plate which increases or
> decreases tension on what I presume is the pendulum spring.  The plate was
> a bit stuck on my clock.  After I moved the plate a bit by hand, the +/-
> shaft worked again.  I was afraid that oiling that shaft could have been a
> bad move, but it was no problem in the end.

The +/- adjuster is actually adjusting the active length of the balance spring, 
which changes its resonant frequency.

-
Jim Adney
jadney@vwtype3.org
Madison, WI 53711-3054
USA

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