[Elecraft] Curious K2 behavior?

[Don Wilhelm]

Randy,

I would suggest that at some time or other, someone pressed the TUNE 
button while they were exploring the operation of your K2 - in fact, it 
may have happened several times.  Pressing TUNE with something other 
than your normal antenna will change the ATU settings.

Setting the menu items takes multiple button presses, but doing a TUNE 
is just a one button operation, and yes it is likely that someone 
'trying out the K2' would press that button.  Next time, connect a dummy 
load to both the ANT1 and ANT2 jacks to protect your K2 from any 
possible damage (but that will not prevent changing the ATU settings for 
each band).

73,
Don W3FPR

Randy wrote:
> Last weekend I took my K2 to the Huntsville Hamfest to help out with 
> the Elecraft booth there.  I had a gel cell battery hooked up to it so 
> folks could twist knobs, push buttons and see what happened.  Several 
> folks did.  Today I turned the K2 on for the first time since then and 
> strangely I had to retune the KAT2 for all bands on both my dipoles.  
> As far as I can tell, neither dipole has changed physically.  One is 
> an attic dipole and the other is an inverted vee hung from trees in 
> the yard.  Both are fed with ladderline.  The attic dipole uses an LDG 
> BA-1 4:1 balun and the inverted vee uses the Elecraft BL-2 set to 
> 4:1.  I had the inverted vee attached to Ant 1 and the attic antenna 
> to Ant 2.  Both had been automatically tuned by the KAT2 to better 
> than 1.2:1 on 80m through 10m before the hamfest.
>
> I thought at first that maybe something had reset all my internal 
> data, but all the menu parameters I've checked, including the filter 
> settings, are unchanged.
>