Replacement Battery

[Allen & Matt]

DonaldF F Christensen wrote:
>
> I have an old Heath Model IM-25 VOM which uses a 1.35 or 1.5 volt(forgot
> which)  mercury cell for calibration. I am told mercury cells are no
> longer available. Can I
> use a lithium battery in place of the mercury? Can anyone provide a
> source for the
> replacement lithium battery? Thanks. Don W8WOJ Midland, Mi.
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--
Hi Don!

Maybe mercury batteries are indeed no longer available.
They're no longer in Radio Shack catalog (who prides
themselves on having batteries for anything!).

Years ago, Heathkit recommended an ordinary 1.5 volt
D-size battery to calibrate their VTVM. They claimed
a brand-new fresh cell actually put-out 1.55 volts
and had a calibration dot just above the 1.5 volt
scale.

Allen

73 de Allen (KJ6XH) and Matt                      West Sacramento, CA
         mailto:mattall at speedlink.com
         http://www.speedlink.com/mattall

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