[Elecraft] Key Out jack

[N4ZR]

I am trying to use the Key Out jack on my K3 to key a small relay to 
protect my SDR from RF.  The 12V at 40 ma is well within the stated rating 
of the jack, but to my surprise it does not work.  Measuring with an 
analog multimeter, the jack appears to be shorted all the time, and also 
to have a very small DC voltage on it.  I don't have a schematic for the 
radio, so I'm stumped.  Is this a function of the way I'm measuring, or...?

-- 

73, Pete N4ZR
Check out the Reverse Beacon Network
at <http://reversebeacon.net>, now
spotting RTTY activity worldwide.
For spots, please use your favorite
"retail" DX cluster.