[Elecraft] K3 Ref. in Jack?

[Bruce Beford]

I think it was originally intended to be a panel mount SMA. There was some
recent discussion around Elecraft -possibly- developing a form of crude
GPS-lock that may make use of this connector hole. No word on possible
timeline.
 
Bruce, N1RX
 
> Anybody know what kind of connector is supposed to go in the REF.IN. 
> hole?  It is apparently too small for a BNC.
 
> 73 de Brian/K3KO