Ron, I'm not sure if your posting was directed at me or not, but I didn't mentally move the decimal point :-) It was a fundamental limitation of the (good, I thought) DMM I was using. It just goes to show that you can't always believe what your measuring instrument is telling you, as I tell my students frequently!
73, Stephen G4SJP On 19 October 2013 18:24, Ron D'Eau Claire <[email protected]> wrote: > Yes, that was my mistake (mentally moving the decimal point!) > > However, several others including me have measured a real parasitic drain > of > almost 40 mA (38 mA in my case) that is produced by the KPA3. I > disconnected > the power to the KPA3 at the circuit breaker and the drain dropped to > virtually zero. > > The measurement was made by placing an ammeter in the positive lead from > the > power supply. Nothing at all connected to the K3 except for the power > cable. > > > It's not an issue to me because I switch off the dc supply when leaving the > shack, but there are a significant number of Hams who run from batteries > and > solar panels even at home. 40 mA can be very significant to them if the rig > is left connected to the battery. > > 73 Ron AC7AC > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Jim Brown > Sent: Friday, October 18, 2013 4:52 PM > To: [email protected] > Subject: Re: [Elecraft] K3 Current Drain When Off > > On 10/18/2013 2:57 PM, Ron D'Eau Claire wrote: > > That only explains the apparent drain of several amperes Jim noticed. > > If you're talking about me, the false readings I was getting from the Watts > Up meter were in the range of 40 mA, and a Fluke measured 4 mA in the > positive lead. There may, however, be something happening on the negative > lead that is causing the false readings. I don't have a fixture yet to put > a > Fluke there. I should do that. > > 73, Jim K9YC > > > ______________________________________________________________ > 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 > ______________________________________________________________ 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
