Re: [Elecraft] A K2 with a short-term memory problem
Not an inappropriate question at all, Rich. For lots of electronic devices it does matter. The penalty for yanking some plugs could even be, in the older argot, the Blue Screen of Death. -Original Message- From: Rich WC3T Sent: Sunday, June 27, 2021 4:01 PM To: d...@w3fpr.com Cc: eda...@aya.yale.edu; elecraft@mailman.qth.net Subject: Re: [Elecraft] A K2 with a short-term memory problem Thanks for the clarification! > On Jun 27, 2021, at 17:54, Don Wilhelm wrote: > > Rich, > > In the case of the K2, it makes no difference if you 'pull the plug' or use > the power switch. > That same thing does not apply to the K3, KX3 or KX2 - you must power down > properly because there are things saved during the power off cycle. > In the case of the K2, the VFO frequency is not constantly remembered, so if > one turns the VFO knob and immediately powers down, the frequency may not be > remembered. The VFO is remembered only after a few seconds of not changing. > > 73 > Don W3FPR > >> On 6/27/2021 5:39 PM, Rich WC3T wrote: >> Dumb question, and I’m no K2 expert — but did you use the power switch to >> power down, or just remove power from the input line?I heard that doing >> it by jerking the rug out from under the supply is a Bad Thing. >> >>>> On Jun 27, 2021, at 17:32, Don Wilhelm wrote: >>> >>> Ted, >>> >>> Try 'counting to ten' before powering down. >>> If you move the VFO just before powering down, the VFO frequency may not >>> have been written to EEPROM yet, the process is not immediate. >>> >>> 73, >>> Don W3FPR >>> >>> > __ 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
Re: [Elecraft] A K2 with a short-term memory problem
Thanks for the clarification! > On Jun 27, 2021, at 17:54, Don Wilhelm wrote: > > Rich, > > In the case of the K2, it makes no difference if you 'pull the plug' or use > the power switch. > That same thing does not apply to the K3, KX3 or KX2 - you must power down > properly because there are things saved during the power off cycle. > In the case of the K2, the VFO frequency is not constantly remembered, so if > one turns the VFO knob and immediately powers down, the frequency may not be > remembered. The VFO is remembered only after a few seconds of not changing. > > 73 > Don W3FPR > >> On 6/27/2021 5:39 PM, Rich WC3T wrote: >> Dumb question, and I’m no K2 expert — but did you use the power switch to >> power down, or just remove power from the input line?I heard that doing >> it by jerking the rug out from under the supply is a Bad Thing. >> On Jun 27, 2021, at 17:32, Don Wilhelm wrote: >>> >>> Ted, >>> >>> Try 'counting to ten' before powering down. >>> If you move the VFO just before powering down, the VFO frequency may not >>> have been written to EEPROM yet, the process is not immediate. >>> >>> 73, >>> Don W3FPR >>> >>> > __ 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
Re: [Elecraft] A K2 with a short-term memory problem
Rich, In the case of the K2, it makes no difference if you 'pull the plug' or use the power switch. That same thing does not apply to the K3, KX3 or KX2 - you must power down properly because there are things saved during the power off cycle. In the case of the K2, the VFO frequency is not constantly remembered, so if one turns the VFO knob and immediately powers down, the frequency may not be remembered. The VFO is remembered only after a few seconds of not changing. 73 Don W3FPR On 6/27/2021 5:39 PM, Rich WC3T wrote: Dumb question, and I’m no K2 expert — but did you use the power switch to power down, or just remove power from the input line?I heard that doing it by jerking the rug out from under the supply is a Bad Thing. On Jun 27, 2021, at 17:32, Don Wilhelm wrote: Ted, Try 'counting to ten' before powering down. If you move the VFO just before powering down, the VFO frequency may not have been written to EEPROM yet, the process is not immediate. 73, Don W3FPR __ 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
Re: [Elecraft] A K2 with a short-term memory problem
Dumb question, and I’m no K2 expert — but did you use the power switch to power down, or just remove power from the input line?I heard that doing it by jerking the rug out from under the supply is a Bad Thing. > On Jun 27, 2021, at 17:32, Don Wilhelm wrote: > > Ted, > > Try 'counting to ten' before powering down. > If you move the VFO just before powering down, the VFO frequency may not have > been written to EEPROM yet, the process is not immediate. > > 73, > Don W3FPR > >> On 6/27/2021 5:21 PM, eda...@aya.yale.edu wrote: >> I just finished debugging a K2 I built this past Spring and, with guidance >> from Gus, KB0YH, it was in shape just in time to try it out in the FD. FB >> so far. Except for one annoying problem. >> >> >> When the rig is powered down it is supposed to remember the last frequency >> it was on. The EPROM, I believe, is supposed to be continuously updated as >> the VFO is moved. Well, this one doesn't do that. When the rig is shut >> down and powered up it opens to the right band, and mode, and filter >> selection; but the frequency isn't the last one used. It's sort of random - >> sometimes a frequency used two or three repoweringups ago; sometimes a spot, >> although in the band, that I don't even recognize. (Or maybe it's I who >> can't remember where he was recently . . .?) >> >> >> I haven't explored all of the other supposedly nonvolatile settings, like >> the filter shaping, monitor settings, linearization and other parameters. I >> have built and operated a handful of K2s over the years, and have never seen >> this behavior, or not that I ever noticed. I thought I'd ask here if anyone >> has seen this sort of thing, or if there are some particular investigations >> I can make that would be of diagnostic value. >> >> >> Thanks for whatever counsel might be offered . . . >> >> >> Ted, KN1CBR >> >> __ >> 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 d...@w3fpr.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 r...@wc3t.us __ 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
Re: [Elecraft] A K2 with a short-term memory problem
Counting to ten is good advice in many situations. Thanks, Don; I'll try that and see what happens. -Original Message- From: Don Wilhelm Sent: Sunday, June 27, 2021 3:30 PM To: eda...@aya.yale.edu; elecraft@mailman.qth.net Subject: Re: [Elecraft] A K2 with a short-term memory problem Ted, Try 'counting to ten' before powering down. If you move the VFO just before powering down, the VFO frequency may not have been written to EEPROM yet, the process is not immediate. 73, Don W3FPR On 6/27/2021 5:21 PM, eda...@aya.yale.edu wrote: > I just finished debugging a K2 I built this past Spring and, with > guidance from Gus, KB0YH, it was in shape just in time to try it out > in the FD. FB so far. Except for one annoying problem. > > > > When the rig is powered down it is supposed to remember the last > frequency it was on. The EPROM, I believe, is supposed to be > continuously updated as the VFO is moved. Well, this one doesn't do > that. When the rig is shut down and powered up it opens to the right > band, and mode, and filter selection; but the frequency isn't the last > one used. It's sort of random - sometimes a frequency used two or > three repoweringups ago; sometimes a spot, although in the band, that > I don't even recognize. (Or maybe it's I who can't remember where he > was recently . . .?) > > > > I haven't explored all of the other supposedly nonvolatile settings, > like the filter shaping, monitor settings, linearization and other > parameters. I have built and operated a handful of K2s over the > years, and have never seen this behavior, or not that I ever noticed. > I thought I'd ask here if anyone has seen this sort of thing, or if > there are some particular investigations I can make that would be of > diagnostic value. > > > > Thanks for whatever counsel might be offered . . . > > > > Ted, KN1CBR > > __ > 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 > d...@w3fpr.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
Re: [Elecraft] A K2 with a short-term memory problem
Ted, Try 'counting to ten' before powering down. If you move the VFO just before powering down, the VFO frequency may not have been written to EEPROM yet, the process is not immediate. 73, Don W3FPR On 6/27/2021 5:21 PM, eda...@aya.yale.edu wrote: I just finished debugging a K2 I built this past Spring and, with guidance from Gus, KB0YH, it was in shape just in time to try it out in the FD. FB so far. Except for one annoying problem. When the rig is powered down it is supposed to remember the last frequency it was on. The EPROM, I believe, is supposed to be continuously updated as the VFO is moved. Well, this one doesn't do that. When the rig is shut down and powered up it opens to the right band, and mode, and filter selection; but the frequency isn't the last one used. It's sort of random - sometimes a frequency used two or three repoweringups ago; sometimes a spot, although in the band, that I don't even recognize. (Or maybe it's I who can't remember where he was recently . . .?) I haven't explored all of the other supposedly nonvolatile settings, like the filter shaping, monitor settings, linearization and other parameters. I have built and operated a handful of K2s over the years, and have never seen this behavior, or not that I ever noticed. I thought I'd ask here if anyone has seen this sort of thing, or if there are some particular investigations I can make that would be of diagnostic value. Thanks for whatever counsel might be offered . . . Ted, KN1CBR __ 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 d...@w3fpr.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
