Fred,

That jumper is *not* the cause of your intermittent behavior.

There should be a "U" shaped "jumper" at least 3/16 inch above the board 
at both top corners of the Control Board as well as at two places on 
both the top and bottom of the RF Board.  The purpose of those jumpers 
is to provide an attachment point for meter probes or 'scope probes.  If 
yours do not stick far enough above the board to easily attach an 
alligator clip, you should consider re-doing those "jumper" points.

73,
Don W3FPR

On 7/30/2012 10:00 AM, KC9QQ wrote:
> There is a small jumper wire on the upper right hand corner of the control
> board.   Is this wire shown on the schematic.  If so where and if not where
> should it be shown.  I developed an intermittent in my K2 after about 3
> years and finally discovered that I had failed to solder one of this
> jumper!!  I would like to be able to tie the symptoms to the location of the
> bad connection.
>

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