"Eric Greenwell" wrote in message
...
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.

Did you use it with your glider transceiver? How has it worked out, and do
you have any problems with noise in the receiver from the converter?


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Eric Greenwell
Washington State
USA

Eric, I have not used the one I reference here. I have only used the one I
built. It has worked fine.I have not experienced any noise issues.

My premise for adding this to my ship is for the rare situation when the
battery is near death and I need to make an emergency transmission. I flip
one switch to make the GPS and Palm Pilot run off their own internal
batteries and flip another to activate the upconverter. BTW, I have a third
switch that selects either the main battery or a small backup battery
dedicated to the GPS secure data logger for badge purposes.