[Elecraft] KE: issue with installation of K3EXREF interface

[Don Wilhelm]

Ron,

OK on the SMA connectors.  I have seen several types.  Some are similar 
the the BNC chassis mount while others have a "nut" on the outside that 
one can grasp with a wrench (and makes my suggestion of screwing on a 
mating connector a moot point).

I do believe my points about using a male connector to provide something 
for pliers to grasp as well as the star lockwasher placement are valid 
points for the chassis mount BNC as well as for *some* SMA connector 
applications.

I did not check the exact SMA connector for the K3/S EXT REF SMA 
connector before responding, and it has been a while since I have 
installed one.
My comments were general and apply only to those BNC and SMA connectors 
that fasten directly to the chassis.

73,
Don W3FPR

On 4/2/2016 7:33 PM, Ron D'Eau Claire wrote:
> Don, in this case the lock washer would jam into the opening for the
> connector. If you look at the setup in the manual you'll see that panel hole
> is oversized and the engineers put an o-ring on the connector that centers
> it in the hole. The inside surface of the panel is masked to provide good
> contact with a large flat washer that goes against the rear panel opening
> and provides a good surface for the nut and lock washer that secures the
> connector to bear against.
>
> The connector has a hex cut on the inside ferrule. Tightening is done with a
> wrench or pliers on the nut outside while holding the hex cut ferrule on the
> inside to keep it from turning.
>
> 73, Ron AC7AC
>
>