Mark,

Yes, that GND terminal connects to the enclosure.  It is used for an AC Safety ground and provides some measure of protection from lightning. If you connect it to a shack ground rod, that rod must be connected to the utility entry ground rod by a heavy (#4 or #6) wire on the outside of the building. If you cannot connect it to the Utility Entry Ground, it is my opinion that the K2 (and other shack gear) is better of left not connected to ground.

73,
Don W3FPR

On 7/27/2018 2:03 PM, Mark Petrovic wrote:
Oh, I see.  Thanks, Don.

The GND is used for earth-grounding the radio?

On Fri, Jul 27, 2018 at 11:02 AM Don Wilhelm <[email protected] <mailto:[email protected]>> wrote:

    Mark,

    While that might work, remember that the counterpoise(s) are a
    part of
    the antenna, and not a "ground".  It is better to use a BNC to
    binding
    post adapter and connect the counterpoise to the black binding
    post - no
    dependency on conductivity through the enclosure.
    The BNC jack shells do not have a dependable low resistance path
    to the
    GND post.


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