[Boatanchors] Sticky meter movement...

[Al Klase]

Gary,

The next step is to cut a thin sliver of scotch tape, hold it in a pair 
of tweezers, and carefully  "go fishing" in the gap between the moving 
coil and the magnet.  This often does the trick, especially if it's a 
piece of magnet debris that's hard to blow away.  You can blow on the 
needle to see if it moves freely.

Oil is a bad bet.

Al

On 6/30/2018 5:49 PM, Gary Peterson wrote:
> I am resurrecting a Central Electronics 100V transmitter.  It has been in storage for decades.
>
> The panel meter has a sticky movement.  It is of the d’Arsonval type.  When the meter pointer swings upscale it tends to hang.  Tapping the front of the case will return the pointer back to the vicinity of zero.
>
> I have opened the case and everything looks squeaky clean.  Nonetheless, I used gentle amounts of dusting gas in the event that a tiny particle in the wrong place was causing drag.  The pointer is not touching the scale plate at any point.  There is no indication that moisture has been a factor.
>
> I will not do anything further, until I feel that I will not exacerbate the problem.  For instance, watch oil, applied with a toothpick, may cause more trouble.  Also, any attempt to adjust the front pivot or bearing may be counterproductive.
>
> Any advice would be appreciated.  Thanks in advance.
>
> Gary
> K zero CX
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-- 
Al Klase – N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/