On Aug 16, 2012, at 6:00 PM, Pete Meier wrote: > If you have batteries installed and then plug in an external power > supply to the KX3, which source is actually powering the KX3?
Whichever has the higher voltage. > > I noticed that, in the above situation, batteries installed and > external power source connected, that if I lowered the external > power source voltage, the KH3 remained at the battery voltage level. > So it appears that the batteries took over. Correct. > > This makes me wonder if that external power source voltage is > "touching" the batteries. No. Each has a diode in series, so they are fully independent of each other. The external supply cannot charge the batteries unless you have a KXBC3 installed, which provides additional circuitry. > Can someone tell if I need to remove the batteries when I plug in > the external power source? No need to do this. 73, Wayne N6KR > I don't want to apply that external power supply voltage to my > battery pack! > > Pete WK8S > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > 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:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
