Thomas Horsten wrote: > I have my fully loaded KX3 on order and have some questions about > the power > supply. I've operated with my FT-817 powered from an 8Ah LiPol battery > pack, which has 3 LiPol cells in series and gives from about 12.5V > when > full down to about 9.5V when fully drained. > > The FT-817 gives just about full output power throughout the range, > dropping the output slightly as the voltage gets below ~10.5V. > > Given that the KX3 can operate from 8 1.2V NiMH cells, I am guessing > that > it will be fine with using my LiPol pack as an external power > source. But > how efficient will it be? What output power can I expect to see at the > different voltages?
The KX3 can put out up to 12 W. At this power level we recommend using a 13-14 V power supply. On some bands the KX3 will put out 10 W with a supply voltage as low as 11 V. This is ideal for use with gel-cells and car or motorcycle batteries. Below 11 V, the max power setting is 5.0 W, where the KX3 automatically switches the PA to a mode that's more efficient at low voltage/low power. On most bands, 5 W is possible with a 9.6-V supply, e.g. 8 internal NiMH cells. 73, Wayne N6KR ______________________________________________________________ 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
