[Elecraft] Keeping the battery charged

Thu Jun 19 21:14:00 2003

Guys,

My question was oriented toward the approach to use when the KPA spends most of 
it's time in the radio and the low power PA/Battery lid spends most of it's 
time OUT of the radio.

In this configuration, I don't have a power connector on the lid, except for 
the internal battery connection that plugs into the main board.

I was curious if anyone had come up with an approach to deal with this 
situation.

Chucky

Note George,  W5YR's stunning brilliance and Chuck's apt reply (gack!)

From:           	"George,  W5YR" <[email protected]>
To:             	"Francis Belliveau" <[email protected]>,
	"elecraft List" <[email protected]>
Subject:        	Re: [Elecraft] Keeping the battery charged
Organization:   	W5YR
Date sent:      	Thu, 19 Jun 2003 09:49:22 -0500

> Bingo, Fran! It works for me, too.
> 
> I readjusted a small 4-amp, 13.8 volt supply to provide 14.4 volts at the
> input connector of my K2. The PS runs 24/7 and even though the battery is
> relatively old  - K2 Serial No. 489 - it remains in good condition and
> appears to have full capacity.
> 
> 73/72, George
> Amateur Radio W5YR -  the Yellow Rose of Texas
> Fairview, TX 30 mi NE of Dallas in Collin county EM13QE
> "In the 57th year and it just keeps getting better!"
> <mailto:[email protected]>
> 
> 
> 
> 
> 
> 
> ----- Original Message -----
> From: "Francis Belliveau" <[email protected]>
> To: "elecraft List" <[email protected]>
> Sent: Thursday, June 19, 2003 9:09 AM
> Subject: Re: [Elecraft] Keeping the battery charged
> 
> 
> > The answer to this questin is rather simple, keep it connected to a power
> > supply.
> >
> > The OCv of the battery should be 13.2 volts.
> >
> > If it is connected to a supply with an output voltage between 13.5 and
> 14.1
> > volts it will remain reasonably well charged.  Normal float charging
> voltage
> > is 14.1 volts and the informaiton that I have indicates that the battery
> > should ber able to survive this voltage being applied indefinately.
> >
> > Therefore if you keep the battery connected to a 14.4 volt supply it will
> be
> > fully charged and ready whenever you need it.  Anything much lower will
> keep
> > it alive, but will not completely restore any lost charge.
> >
> > Fran
> 
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