[Elecraft] KANT3 Replacement PC board

[David Olean]

I hope someone can steer me in the right direction. I was trolling 
through my junk and found a new un populated PC board.  I must have 
bought it from someone on the Elecraft reflector, but I have no memory 
of any of it!   All I have is the PC board and a printed sheet with a 
parts list.  By board has "Copyright Arcom 2016  KANT3 REV 1.0" printed 
on it.

The board has positions for 3 ICs and two small relays. It looks like it 
was made to route extra antenna connections etc. but I have no 
information on what it does or how it is implemented into the K3. Can 
anyone point me towards a description  on this accessory?  I could find 
no mention of anything with a google search.

Dave K1WHS