The K3/10 will run down to 9.0 V or so -- much lower than almost any other desktop transceiver. Of course available power output will drop at such low voltages.
The K3/100 needs 11 V to make 100 W on most bands (and higher on some bands), but it should not shut down completely until you hit that 9.0 V level. The radio will automatically reduce power (or drop completely out of QRO mode, bypassing the KPA3) as required. If you notice any "interesting" behavior other than what I described, let me know. 73, Wayne N6KR On Jun 28, 2012, at 11:07 AM, Peter Wollan wrote: > The problem here isn't the battery AH capacity, but the voltage > supply. It could be dropping below 10 vdc because both radios are on > the same supply, or because the power supply wires are too fine gauge, > or because the battery is defective. > > The K3 is less robust to supply voltage than the other Elecraft > radios. The K2 is rated for 10-15 volts; the K1, KX1, and KX3 go > down a lot lower, I think 8 volts. I looked at the K3 documents to > see what minimum voltage it requires, and I couldn't find it -- I > think it's something like 11, but it may be 11.5 or even 12. > > You'd probably do fine just by using a separate battery for each > radio, and not letting it run down too far. A voltage booster isn't > needed, as lots of operators all over the world have demonstrated. > > Peter W0LLN > > > On Thu, Jun 28, 2012 at 12:19 PM, John Kountz <j...@t6ee.com> wrote: >> ... In tandom >> operation, the Eagle was not affected by momentary voltage dips >> (below 10 >> VDC) whereas the K3 would shut down. > ______________________________________________________________ > 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
