nuckolls.bob(at)aeroelect
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 Posted: Sat Apr 25, 2015 6:54 am Post subject: Ideas on a "cost effective " ground power ? |
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JeffS,
Have you tried a good old fashion battery charger (not a
maintainer). There are lots of chargers that are capable of putting
out 10-15 amps which should be plenty to keep the avionics & most
accessories running. (unless you have some need to run the
high-current loads for really long periods of time?)
I have an ancient Sears charger that can put out about 15 amps all
day long & I use it to float loads when I'm bench testing.
A quick goole search found this:
Be wary . . . not all 'battery chargers' are
the same. When crafting a source of ac mains
powered DC for ground ops, the power supply
needs to be reasonably well REGULATED and
noise levels no greater than an engine driven
alternator.
Years ago I sold a 25A, 13.8V regulated
power supply for this purpose. I think I sold
them for about $125. As I recall, we sold
about a dozen.
Years later, there are even more attractive
versions of this approach to ground-power.
Here is one such device.
http://tinyurl.com/k6gf8gt
These have a voltage adjust pot that will
probably allow you to turn the 15v output
down to 14v.
CAUTION: If you plan to have a battery on
line, then make sure the battery is fully
charged. These are power supplies, not battery
chargers. Alternatively, use the power supply
'barefoot' and leave the battery off line.
Bob . . .
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