[Elecraft] A K2 with a short-term memory problem

[Rich WC3T]

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 <don at w3fpr.com> 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, edauer at 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 at 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 don at w3fpr.com
> 
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at 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 rich at wc3t.us