Jim Vincent wrote:
wrote in message
oups.com...
That is just pure nonsense (the up vs down part). You can buy a 30W
(15V @ 2A) dc-dc converter for $62 from Mouser (search for
UHE-15/2000-Q12). The description says the input is 24V, but it really
is 9-36V, which should cover just about any battery you want to come up
with. The thing is 88% efficient and occupies 1.5 in^3. You can buy
lower power ones even cheaper. If that makes your 14V heart feel
better, go for it (it won't damage your radio).

Tom Seim
2G DG-400


Get one of these for $45 and it will take your 12 V input and upconvert it
to 14V, handle 2A and be about 83% efficient.

http://www.dimensionengineering.com/AnyVolt.htm

I wish I had been available two years ago when I built my own 13.9V
upconverter.

This looks like a hobbyist product that would have to put into an
enclosure before using in a glider. What I found is a commercial dc-dc
converter that is in volume production from a company that has an
established reputation. It is also a much smaller package, has
over-voltage protection & short circuit protection, and meets all
specifications at -40 C. I doubt that the other unit has even been
tested at anything but room temperature. The level of testing and
quality assurance that a company like Datel has to offer should not be
underestimated.

Tom Seim
2G DG-400