[Elecraft] KAT500 Tune Memory and Power Failure Restart

[Phil Hystad]

Fred,

Thanks for the comments.

I know more than I did before but I still do not know exactly what happened.  I am now thinking that it is the antenna's fault as much as the loss of power or more so or at least a party to the crime.

My bypass SWRs are anywhere close to what they were before so the wind has caused a problem with the antenna match I think.  Too dark to check tonight so have to wait until tomorrow.

73, phil, K7PEH


> On Dec 10, 2014, at 7:34 PM, Fred Jensen <k6dgw at foothill.net> wrote:
> 
> On 12/10/2014 6:46 PM, Phil Hystad wrote:
> 
>> 1.  Is it normal behavior to lose saved memory values of tuned
>> positions.  I checked other spots and nothing is saved on the entire
>> 80-meter band — I mean, I had high-SWR on all of my 20 KHz sections.
> 
> It doesn't sound like normal behavior, I imagine they're in EEPROM or something like that.
>> 
>> 2.  Or, is there something else happening.  I have heard that the
>> K3/KAT500 combo gets messed up if the K3 comes alive before the
>> KAT500.  Is that possibly what happened here?  I was not in the room
>> when this happened so I am assuming that power on startup was a race
>> and I am thinking that the KAT500 might be first but I don’t know.
> 
> I once fired up the K3 ahead of the KAT500, and while it didn't lose its mind, things didn't work right.  Removing power [really pulling the plugs] and restoring it with KAT500 ahead of K3 solved the problem.  I'm pretty sure that the K-Line is like everything else in this house that runs on electricity, "off" isn't really all the way to "OFF."
>> 
>> 3.  I am assuming I have to reprogram all my memory locations for all
>> three of my antennas (80/40/30 meter dipoles).
> 
> It is human nature to assume the worst when often it's a lot simpler. I'd try the "real OFF" thing first and re-power in the right order.  Our low impedance/hi-current 21st century gear uses very large capacitors so give everything a chance to discharge.  The KAT500 Utility will let you look at the current L-C values in the L-network for wherever the tuner thinks it is tuned, you might try moving through a band and see if they change as you QSY ... or are perhaps all zero?
> 
> The Pineapple Express is moving into NorCal tonite, we're on a 69 KV tie line that runs through our pasture between two hydroelectric plants and we don't lose power very often, but just in case I think I'll pull the plug on everything before I head for bed.
> 
> 73,
> 
> Fred K6DGW
> - Northern California Contest Club
> - CU in the 50th Running of the Cal QSO Party 3-4 Oct 2015
> - www.cqp.org
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