They basically take the 12 volt DC power in and chop it up to make a high=
frequency AC power, run it through a transformer to boost the voltage and=
then rectify it to make DC power at a higher voltage. If you need low
power DC at 24 volts, then the converters are pretty cheap. When you get=
into hundreds of watts the price goes up into the hundreds of dollars. =
Another way to get 24 VDC might be to buy a 300 watt car power adapter
(makes 120 VAC from 12 volts) and then power a 24 volt battery charger of=
f
of that. A 300 watt 12 -> 120 VAC converter is selling for about $70
right now. I don't know how much a 24 volt battery charger costs. This
wouldn't be as clean as using strictly a 12-> 24 volt converter, but it
should get the job done.
Adding a second 24 volt alternator or generator and a second set of
batteries might be cheaper than adding a high power converter . It all
depends on how much 24 volt power you need. =
Dave
++++++++++++++++++++++++++++++=3D
Message text written by Steve Malikoff MV list account
>I replied to Claude off-list a little earlier, but I just thought I woul=
d
mention to the list what I told him in case others are interested in the
same
type of thing. An electronics-guru friend of mine designs and sells volta=
ge
converters for 6V to 12V (and vice versa, with no heat loss that a
resistive
voltage divider has). I suppose if there was sufficient interest, he woul=
d
make
12V to 24V converters too. The 6 to 12 ones drive CB's and car radios
without
any problems. He is at johna@babel.apana.org.au and has a small web page =
at
http://john.gpo.tm/conv.html for the existing ones.<
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