In article ,
Richard Harrison wrote:
Off topic, but you can`t power an antenna without power to the
transmitter.
I`m looking for a d-c to d-c converter that takes 28 volts on the input
and supplies 12 volts on the output. Up to 8 amperes may regularly be
drawn from the supply. That`s about 100 watts.
I need it now. That`s why I`m imposing on this group. There is no more
knowledgeable group to ask that I know of. I don`t have time to build
anything, though I`ve built such inverters and converters.
Check with Vicor (
www.vicr.com). They make a whole range of DC-to-DC
converter modules.
Example: their V24B12C200B converter module takes 18-36 volts in, 12
volts out (programmable from 10% to 11% of this, so you could get 13.2
out), efficiency 85%, 200 watts output. Current limit is 17 amps
minimum, 19.2 amps typical.
They do have a 100-watt module, but I suspect you'd be running it
right at the ragged edge of its specs.
There are other manufacturers playing in this market space... Datel is
one.
A simple voltage divider or regulator is too lossy for high utilization.
I need lossless resistance.
You won't get 100% efficiency out of anything like this. 80-90% seems
to be achievable with commercial products.
I would like rugged, reliable, efficient, replaceable, and cheap.
I think you can get the first four if you look around.
The fifth is likely to be the hardest, if you want the first four.
--
Dave Platt AE6EO
Hosting the Jade Warrior home page:
http://www.radagast.org/jade-warrior
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