A workable general purpose solution is shown here: http://ca.picclick.com/DC-DC-Converter-QS-1212CCBA-80W-Power-Supply-251036051706.html
I'm using it in a mobile setting to isolate the KX3 from the vehicle's electrical system. Pretty good results, and no hash. 73, matt W6NIA On Mon, 13 May 2013 05:55:42 -0700, you wrote: >How about using a 4S LiFePO4 battery? From fully charged to 15% charge I >get from about 14 V to 12 V in RX and very little sag on transmit. Pretty >much the ideal battery for this radio in my opinion. They are rated to go >down to 10V or so, but since you don't get that much more and you can >permanently damage the batteries if you go too low, I stop at 12V. The KX3 >will run full power throughout this range, too. I use real A123 brand cells >with a balancing charger. These do not have quite as much energy density as >LiPo;, but you do not need anything else. I also keep Eneloops in the KX3. >I have not tested it but I think it will switch over if the external >battery goes below their voltage, somewhere about 10 V. If someone could >confirm that, it would be great. Those NIMH Eneloops run below 11V for most >of the discharge cycle, so only 5 W on those but they hold a charge a long >time so they can be used in a pinch. > >73 > >Mark >______________________________________________________________ >Elecraft mailing list >Home: http://mailman.qth.net/mailman/listinfo/elecraft >Help: http://mailman.qth.net/mmfaq.htm >Post: mailto:Elecraft@mailman.qth.net > >This list hosted by: http://www.qsl.net >Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
