Is that 12.1V reading during receive or transmit (the voltage will tend to sag when pulling higher currents during transmit)? I don't have a K3, but I do have a KXPA100, and I find that it will not develop a full 100W if I only feed it only 12V -- it works much better with a supply of 14V.
The impedance of the antenna will vary from band to band -- if the impedance happens to work out lower on 20m than on the other bands, then the extra current draw on that band together with the supply voltage at the low end of the range may be enough to trip the high current alarm in your PA. 73, Matt VK2RQ > On 16 Dec 2014, at 4:03 am, Ken <wa8...@gmail.com> wrote: > > In my case, the K3’s internal volt meter is indicating 12.1v, well above the > minimum specs. I am pretty sure this only happens on 20m, never on other > bands. I wouldn’t think supply voltage would be band selective. I’m using > the power cable that came with the K3. > > Ken WA8JXM > > >> On Dec 15, 2014, at 11:11 AM, Don Wilhelm <w3...@embarqmail.com> wrote: >> >> Matt is entirely correct. The first thing to investigate in the event of a >> Hi Current message is the voltage (as indicated by the K3) level during >> transmit. >> >> The way Elecraft transceivers control power, a low voltage means that higher >> current must be obtained to maintain the requested power output level. >> >> Common causes are loose connections at the power supply, improperly >> assembled Anderson PowerPole connectors, and either long power supply cables >> or too small a wire gauge resulting in significant voltage drop when current >> is drawn. >> >> This applies not only to the K3, but also to the KXPA100 and the K2/100. >> >> 73, > > ______________________________________________________________ > 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 > Message delivered to matt.vk...@gmail.com ______________________________________________________________ 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 Message delivered to arch...@mail-archive.com
