[Elecraft] K3 battery power

[Don Wilhelm]

Steve,

Yes indeed - Look at the chargers from A&A Engineering 
http://www.a-aengineering.com/.  Depending on your battery and the loads 
connected to it, you may want the 5 amp Smartcharger, but if you are not 
transmitting a lot and do not have the subreceiver installed, the 1 amp 
may do for you.
These are linear Smartcharger that use the UC3906 controller rather than 
pulse width control, and they create no detectable noise.
I have one modified for 250 ma. that has been connected to my QRP K2 
with internal SLA battery for years.  The K2 always runs on the battery 
and the Smartcharger replenishes the internal battery.  Works swell for me.

73,
Don W3FPR

Steve Ellington wrote:
> I'm wondering what to use for battery power. The K3 requires 13.8v. I would 
> like to use a typical golf cart battery and a charger but am concerned about 
> the voltage from the charger being too high and possible switching noise. 
> I've seen some QST articles showing DIY projects but those are rather 
> involved. Does anyone make a charger/controller that you can just plug in 
> and not worry about over-voltage?
>   
>