> Sounds like a case for checking your batteries
> routinely. After all, they have a very finite
> lifetime, and are expected to wear out.
> Hospitals replace them routinely.
Sometimes one can't reach the site for more than
half a years time. Remote batteries at those
locations often last about 2 maybe 3 years before
they are changed. For critical customers, they
get changed min every two years. 8D Lead Acid
Batteries are cheap... we're getting them for about
$99/each retail (Sam's Club of all places).
A former job site has station batteries still in place
from 1957/58. When they're taken care of... they
can last a long time. Like the old Sugar Daddy ad...
> Yeah. Basically, it looks like they took a National
> app note for the 723, and called that a finished design.
I've seen only a handfull of finished LM-723 regulator
circuits that indicate the Design Engineer actually read
the data sheet. The early - mid Astron regulator board
was a mixed bag of fun.
> Not a bad start, but not a finished design.
The saving grace is/was the problematic but mostly
functional "hefty" crow-bar circuit.
cheers,
skipp
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