K2 Internal Battery Charger

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K2 Internal Battery Charger

Bruce W1UJR
Sure that this has already been asked and answered a dozen times, but  
I seem to have a problem being able to search the reflector archives  
(is there a trick to that?).

What is best method to change the internal battery of the K2?
I understand it needs to be about 14 volts, so the typical car  
battery charger is too low.


73 Bruce W1UJR
www.w1ujr.net
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Re: K2 Internal Battery Charger

Don Wilhelm-3
Bruce,

CAR BATTERY CHARGER??  Those things are usually quite poorly regulated
and often soar to 17 volts or more with little or no load.  Note that
the max voltage for the K2 is 15 volts, so you could get into trouble
with one of the auto battery chargers.

You can use a regulated power supply whose output is 14.1 to 14.3 volts
with no problem - if the power supply has an output voltage adjustment
inside, you can boost the voltage above the nominal 13.8 volts.

There is another method - and that is to use a SmartCharger, but for
those to work they must connect directly to the battery terminals (fuse
the separate battery connection).  See my webpage
http://w3fpr.qrpradio.com to see how I did it.

73,
Don W3FPR

[hidden email] wrote:

> Sure that this has already been asked and answered a dozen times, but I
> seem to have a problem being able to search the reflector archives (is
> there a trick to that?).
>
> What is best method to change the internal battery of the K2?
> I understand it needs to be about 14 volts, so the typical car battery
> charger is too low.
>
>
> 73 Bruce W1UJR
> www.w1ujr.net
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft 
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>
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