[Elecraft] K2 Internal Battery Charger

[Don Wilhelm]

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

w1ujr at mac.com 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
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