[Elecraft] Connecting a long wire antenna to the K2 with the KAT2 tuner

[Don Wilhelm]

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 <donwilh at embarqmail.com 
> <mailto:donwilh at embarqmail.com>> 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.
>