[Elecraft] K3 13.8 VDC power

[Bill Frantz]

There are some cautions in floating a battery with a mains power 
supply. For example, the ProAudio Engineering PAE-Kx33 4A 
switching power supply I am using with my KX3 specifically says 
not to use the power supply for directly charging batteries, and 
voids the warranty if you do.

I had a prototype battery charge controller I was designing let 
the magic smoke out when the input power dropped and the battery 
sent current backwards through the circuit. The tantalum cap was 
actually in flame. (A diode was part of the fix.)

Like Jim, I use a solar charge controller 
<http://www.cirkits.com/scc3/> to charge the batteries which run 
my K3 station.

73 Bill AE6JV

On 12/22/14 at 11:31 PM, rpfjeld at embarqmail.com (Richard Fjeld) wrote:

>Is anyone floating a battery across their power distribution?
>
>Dick, n0ce

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