[Elecraft] K2 Straight key auto detect

[Don Wilhelm]

Gene,

You *must* use a stereo plug in the K2 paddle jack no matter whether you 
are using a straight key or paddles.  If using a straight key (or 
computer keying) connect only to the tip and to the shell of the plug.  
That is true when using a direct connection, and not necessarily Auto 
Detect.

Auto Detect will allow you to use paddles in conjunction with a straight 
key (or computer keying), and requires two diodes.  See page  99 of the 
K2 Owner's Manual (download it from www.elecraft.com if you do not have 
a paper copy).  It will work more reliably if you use Shottky diodes 
such as 1N5711 which have a lower forward voltage.  You must turn Auto 
Detect ON to use it.  Go to the INP menu, edit the parameter and tap 
DISPLAY to toggle ADET on or off. With ADET set to ON, you should be 
able to key the K2 from the straight key (or computer) even though the 
INP menu is set to PDLn or PDLr.

73,
Don W3FPR

On 9/18/2014 7:19 PM, Gene N4FZ wrote:
> Thanks Matt, very much, I had that sinking feeling. Auto detect doesn't work
> then I guess. I bought this K2 second hand, nice little rig. Had it over two
> years now. Normally use the BY-1 paddles.  73  Gene
>
>