Not wishing to take this thread too much offf course, but the dollar equivalent cost of 1 kWh in the UK is about 24 cents US and soon about to rise and we don't have the most expensive elecrical energy in Europe by a long way. So I turn off whatever I can!
73 Stephen G4SJP On 16 October 2013 22:05, Ken K3IU <[email protected]> wrote: > Same here but only about 31ma on a Triplett 2202 DMM on K3 s/n 202. > 73, Ken K3IU > ~~~~~~~~~~~~~~~~~~~ > > On 10/16/2013 5:01 PM, Ron D'Eau Claire wrote: > >> I disconnected everything from my K3 except the power cable and the drain >> when off remains at 38mA. >> >> I don't have the time right now to pull the PA module, but that sounds >> like >> the next best possible culprit. >> >> I had never noticed the parasitic drain because my station power supply is >> switched off when I leave the shack. >> >> 73, Ron AC7AC >> >> >> >> -----Original Message----- >> From: [email protected].**net<[email protected]> >> [mailto:elecraft-bounces@**mailman.qth.net<[email protected]>] >> On Behalf Of Wayne Burdick >> Sent: Wednesday, October 16, 2013 1:34 PM >> To: [email protected] >> Cc: Reflector Elecraft >> Subject: Re: [Elecraft] K3 Current Drain When Off >> >> Jim, >> >> Here's one possible explanation: >> >> The external power supply must drop all the way to zero V, as must any all >> K3 I/O signals. This may have implications for attached equipment. >> >> If there's any residual voltage on the supply or I/O lines, even 1 V, the >> K3 >> may not turn off all the way. It turns out that the brown-out detection >> circuitry on microcontrollers can be confused at some power levels that >> are >> low enough to look like a brownout but not high enough to properly power >> the >> detection circuitry. Under such conditions the MCU may continue to run on >> power-down via the on/off switch, resulting in the radio drawing an >> unpredictable amount of current. >> >> If residual supply or I/O leakage isn't the cause, then I suspect a >> problem >> with your K3's on/off circuitry or possibly even the PA module. (You could >> test the latter theory by unplugging the KPA3.) Every K3 we've tested >> drops >> to a very small number of milliamps of current drain when off. >> >> 73, >> Wayne >> N6KR >> >> Jim Brown <[email protected]> wrote: >> >> Nope. I measured both units several times, and just now repeated the >>> >> measurements. >> >>> 73, Jim >>> >>> On 10/16/2013 11:23 AM, Eric Swartz - WA6HHQ, Elecraft wrote: >>> >>>> Hi Jim - you must be misreading the meter by several decimal points :-) >>>> >>>> We just measured several K3s in the lab and they both draw less than 5 >>>> mA >>>> >>> when off. >> >>> Eric >>>> elecraft.com >>>> >>> >> >> ______________________________**______________________________**__ >> Elecraft mailing list >> Home: >> http://mailman.qth.net/**mailman/listinfo/elecraft<http://mailman.qth.net/mailman/listinfo/elecraft> >> Help: http://mailman.qth.net/mmfaq.**htm<http://mailman.qth.net/mmfaq.htm> >> Post: mailto:[email protected].**net <[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<http://mailman.qth.net/mailman/listinfo/elecraft> >> Help: http://mailman.qth.net/mmfaq.**htm<http://mailman.qth.net/mmfaq.htm> >> Post: mailto:[email protected].**net <[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<http://mailman.qth.net/mailman/listinfo/elecraft> > Help: http://mailman.qth.net/mmfaq.**htm<http://mailman.qth.net/mmfaq.htm> > Post: mailto:[email protected].**net <[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
