On 4/15/2010 8:25 AM, Wes Stewart wrote:
> For the life of me I can't understand why radios continue to be
> designed around an automobile storage battery when fewer than 1%
> will ever operate in a mobile environment.
For those of us who insist that our communications gear operate
when the mains power goes off, the 12V DC battery system is the
most reasonable backup. Few if any of us have the resources to
install a commercial 48V battery system - which is the
commercial standard currently - or the 40 KW backup generator
or solar array which is what is needed (but don't have) to run
my house "off the grid".
For communications backup purposes we don't use "automobile
storage batteries" which are designed for a large current draw
for a short time (engine cranking) and relatively little current
draw afterward while the alternator picks up the load. Deep-cycle
totally sealed batteries are the standard for communication
backup systems of this capacity.
My engineering firm designs commercial communication sites
primarily for the public safety community and such backup
power systems are a very important part of what we do for our
clients.
-- 73 de K2ASP - Phil Kane
Elecraft K2/100 s/n 5402
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