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Date: Fri, 27 Apr 2007 18:34:04 -0400
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Subject: 12v supply to stabilize avionics
From: "bob mackey" <n103md@yahoo.com>
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I am purchasing a 12V power supply that takes
6-24V input and gives 12V out at up to 14 A continuous.
It's a 95% efficient switcher with a quiescent current
around 10mA. We need to buy ten of them to get a
better price.

Why do I want one? Why might you want one?

I have a 1-battery airplane and don't want to rewire the
whole thing. The GPS and radios reboot if they are on when
I start the engine. During cranking, the bus voltage drops
to around 10 V, and the avionics brown out. I want that
problem to go away, and also want to keep the radio working
for a while if the alternator shuts down and the battery drains
below 10V.

So, the solution I am trying is a switching power supply that
converts anything between 6 and 24 V in to a stabilized 12V out.
with 95% efficiency, the lost power is minimal. We would like to
buy 10 units for about $55 each (+ s/h). We've accounted for
four units, so there will be six more available. Who wants one?

-bob mackey