Re: [CAD_CAM_EDM_DRO] 67 1/2 volt battery

>

> I have a wood moisture meter (essentially an Ohm meter) that uses
> one funky 67.5 volt battery. About the size of a pack of
> cigarettes.
> Are these batteries still available? Suggested sources?
> Thanks
>

Looking in an Allied Electronics catalog I see an Eveready 467 (NEDA
200) 67.5V 2 13/16 x 1 3/8 x 3 45/64, replaces an XX45 and it's only
$33.84 (only 50 cents a volt). Probably been on the shelf since the
50's. :-)

Allied is on the web: www.allied.avnet.com. You could try Newark and
possibly DigiKey as well. But you'll have to go to an electronics
distributor for that one.

Since it's probably low draw, I'd replace it with a 9V using a
small up converter. Unfortunately, you'd likely have to roll
your own, but your could probably do it with a small inductor and
one of the switching regulator chips floating around. Run through
Maxim's web site and you're likely to find an app note showing something
that could be adapted.

Paul
--
Paul Amaranth | Rochester MI, USA
Aurora Group, Inc. | Systems & Software
paul@... | Unix / Windows / NT