[Elecraft] K3 13.8 VDC power

[Gary Gregory]

AGM batteries can be air freighted...nuff said on safety.

Gary
Vk1ZZ
K3, KX3, KPA500-FT, KAT500-FT,P3.
On 23/12/2014 7:29 AM, "tom armour" <wa4ta at hotmail.com> wrote:

> I use one of these power supplies with a battery backup module installed
> (Model: SEC-1223BBM).  I have a deep cycle battery attached to it.
> http://www.samlexamerica.com/products/ProductDetail.aspx?pid=516The
> hot-switches to battery is very nice when power fails. Also if you happen
> to draw more than 25A it uses the battery for the difference from up to
> 35A.  It charges the battery at 5A with normal power.Tom - wa4ta
>
> > Date: Mon, 22 Dec 2014 13:51:52 -0600
> > From: rpfjeld at embarqmail.com
> > To: elecraft at mailman.qth.net
> > Subject: Re: [Elecraft] K3   13.8 VDC power
> >
> > Wow, thanks to all for the greatly informative answers.  I gleaned many
> > good ideas from them.
> >
> > This is my concern; I am interested in protecting my K3 from damage by
> > not being shut down properly should a power interruption occur while the
> > K3 is operating. For this design, I'm thinking about a worst case
> > scenario; in transmit mode at 100 watts/20 amps, plus accessories on.
> >
> > I am concerned about Hydrogen gas while charging a lead-acid battery
> > here in the furnace room.  Since I don't need to operate by battery
> > power,  I'd like to know your thoughts about if a Gel-Cel battery of a 9
> > amp variety would handle the 20 amp load until I could go to receive
> > mode and properly shut down?
> > I haven't had any experience drawing that much amperage from a gel-cel
> > momentarily.  I don't know if the load voltage would be adequate to keep
> > the K3 alive.  I'd need to test it using an older style radio.  I'm
> > hoping someone has had experience related to this.
> >
> > Thanks in advance for comments,
> >
> > Dick, n0ce
> >
> >
> > On 12/22/2014 1:31 AM, Richard Fjeld wrote:
> > > Is anyone floating a battery across their power distribution?
> > >
> > > Dick, n0ce
> > >
> > >
> >
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