Re: 67 1/2 volt battery

You could also wire 7 or 8 of the 9 volt batteries in series. Much
cheaper and simpler.

--- In CAD_CAM_EDM_DRO@egroups.com, paul@a... wrote:
> >
>
> > 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@A... | Unix / Windows / NT