[Milsurplus] ARC-38 chopper issues

[J. Forster]

It's a combination of the mechanical abrasion (wiping) AND voltage. Once
you open the thing, it's not going to work for long. Also overdriving the
coil, as I suggested, increases the wiping. The contacts on a chopper are
tiny (under 0.025" OD)

YMMV.

-John

==================



> If it's a problem with oxidized contacts then I would think it unlikely
> that you can fix it externally. It takes a remarkable amount of physical
> abrasion to get oxidized vibrator contacts to make reliable contact (even
> new, sealed, vibrators frequently have very high resistance contacts in
> my experience).
>
> I can't see what you have to lose by opening the can. A precision
> mechanism that doesn't work isn't particularly useful. Also, if you find
> out
> what has caused one of them to fail you may stand a better chance of
> fixing the others.
>
> 73, ian K3IMW
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