[R-390] Meter Meister?
Joe Foley
[email protected]
Mon, 16 Jun 2003 16:25:03 -0700 (PDT)
Nope, no ranges, no resistors except the two coils on
the back panel.
One wire goes directly from the terminal on the side
of the box to one end of the coil, the other wire goes
from the other terminal to the two resistor/coils in
series, then to the other end of the coil. Simple,
very simple,....... just doesn't work much.
Reverse needle movement doesn't peg, only about the
same as forward movement.
--- Barry Hauser <[email protected]> wrote:
>
> Joe wrote:
> > BTW, there are three tiny balancing nuts
> > on the needle placed at 90 degrees apart from the
> > needle itself.
>
> Sounds more complicated than usual.
>
> Mostly it's a bare meter movement. I
> > have a similar DC current meter to pair with it if
> I
> > can keep it working. The needle is free, responds
> to
> > full scale with the puff test, smoothly, too.
>
> Probably not particles or misalignment of the
> armature then. Sometimes I've
> come across such severe static that a meter won't
> zero -- just hangs
> wherever you point to on the "glass". (Mostly
> happens with plastic lenses.)
> I doubt if that's it given the vintage and so on and
> that usually clears up
> sitting around or when subject to some current.
>
> Have you tried running the meter out of it's case?
> Does it have a range
> switch with precision resistors. Maybe one is bad.
> You said it won't go
> above 2 volts, but will peg with reversed polarity
> -- how much swing between
> zero and "peg left"? Might be 2 volts or less.
> Does it have other ranges?
>
> Barry
>
>
>
>
>
>
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