That's a fairly common problem with the 1n. The meter is housed in a
separate plastic housing to facilitate removal, and they used a foil strip
to make the ground connection. Problem is, they glued the foil in place,
and of course the glue weeped out -- presto, unreliable ground.
The best check is to remove the top cover, switch the meter on, and short
the meter's housing to ground -- if the meter instantly works, it's bad
ground.
The solution is to remove the meter housing, flip it over, and clean the
glue off the bronze-colored foil strip. Also, you might want to scrape off
any black paint on the lug where the foil rests. In short, an easy fix if
you know the problem.
> An OM-1N I recently found has a jumpy meter needle. By that I mean when I
> turn on the meter--I'm using a mercury battery--the needle sometimes
> doesn't move. Turning the switch off and then back on seems to get it
> going. I've also noticed sometimes a slight delay in moving when turning
> the switch on.
>
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