[R-390] Meters

Wed, 30 Apr 2003 22:02:55 -0400 (EDT)

R-390/R-391/R-390A carrier meters are 1 MA FS, 17 ohm, as far as I know.
R-392 meters are 27 ohm, again as far as I know. I'm sure there is some
variation.

I was lucky to snag a small bunch of 5.6 ohm 1MA FS meters, which just
need a small inline resistor to approximate 17 ohms.

Some of the simpson 100 ohm 1MA FS meters have an internal shunt resistor
that can bridged, giving a new resistance that is much lower.

The meters are radioactive, and you should be careful, but it ain't
plutonium.  I remember having some radioactive isotopes in my 7th grade
science class.

Paul

On Wed, 30 Apr 2003, Scott, Barry (Clyde B) wrote:

> I think this has been covered before, but I don't recall.
>
> Given the Carrier Level meter is a 1ma full scale meter, can any old 1ma
> full scale meter be used?  Same goes for the Line Level meter (not sure of
> the full scale is for that one).  Other than the scales and the physical
> size, is there something characterstic about these meters that make
> replacing them all that difficult?
>
> Thanks,
>
> Barry(II1/2) - N4BUQ
>
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>

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| Paul Anderson           Public Data Queries, Inc. |
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