On 2009-09-23, Richard J Kinch wrote:
I'm wanting to revive a vintage Taylor-Hobson Talyvel inclinometer:

http://www.truetex.com/talyvel.jpg

This specimen calls for what appears to be a pair of absent
"Mallory battery SKB-830" units for power, which comes up unknown on a Web
search. From the enclosure and connections it looks like these might have
each been a cylinder about the size of two C cells in series with snap tabs
similar to a 9-volt battery but larger. The battery test meter appears to
be testing for about 6 volts. Maybe 5.4 volts if it was four mercury cells
at 1.35 volts each.

Any ideas on what this battery might have been? All I can determine is
that the Mallory SKB batteries were the mercury type developed during WWII
(http://www.duracell.com/procell/about/background.asp).

In that case -- give up on finding any (they are now made of
unobtanium), and work on making a substitute. If you need to duplicate
the voltage from the mercury cells, you will probably want to add some
diodes in series to drop the voltage to the right range.

Good Luck,
DoN.

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