[Elecraft] K3 + Microkeyer II - RF into paddle input

[g4amt at sennen-cove.com]

Has anyone had a problem with RF getting into the paddle input of the MKII ?
Problem is reduced somewhat by careful adjustment of the router `Winkey`
page, but essentially series of Ds likey to turn into Ms and Gs (!); fine
with K3 on test so has to be RF based. MKII keys clean with no problems
`internally` but misbehaves when keyed with paddle. Tried all usual
decoupling - separate power supplies etc etc ..

On a slightly separate but perhaps relevant note, I have no +12V output on 
the rear phone jack on the K3  - this is bracketed (switched) in the manual 
but I can find no reference to where to switch it !  ... it means running 
the MKII from a 12v psu with the DB37-EL-K3 12v in phone lead floating free.
Thanks in advance for any help !

Terry
G4AMT