[Elecraft] K3S K-line cabling

[David Aslin G3WGN]

Don, many thanks for this.
The mist is at last clearing.  I have the CBLP3Y connected as per the P3 manual and all works well.
I now understand that the 'PC' jack is predominantly for firmware updates/Elecraft Utility and remote operation.  It was naming several connectors 'PC' across all the boxes that had me confused about where the shack PC should connect.  It's on the USB and staying there ;-)

Will buy/make a suitable Y cable to connect the antenna controller to the P3 PC connector.
Thanks again,
73, David G3WGN  M6O

-----Original Message-----
From: Don Wilhelm [mailto:donwilh at embarqmail.com] 
Sent: 27 October 2019 16:56
To: David Aslin G3WGN <david at aslinvc.com>; elecraft at mailman.qth.net
Subject: Re: [Elecraft] K3S K-line cabling

David,

Download the latest P3 manual and look on page 5.  You will need the CBLP3Y cable.

The KAT500 and KPA500 use the AUX cables and not the serial data.  The PC connection shown in the KAT500 manual is for connection to the PC for use of the KAT500 Utility and has nothing to do with the normal serial data between the K3 and the P3.

To get the serial band data to your antenna controller, use a "Y" cable at the PC connector on the P3.

There are other ways of connecting things as shown on page 6 of the P3 manual, but you will have to connect the PC to the PC connector on the
P3 and not use the internal USB to serial adapter included in the KIO3B, but you will still have the USB soundcard that is internal to the K3.

73,
Don W3FPR

On 10/27/2019 12:08 PM, David Aslin G3WGN wrote:
> I have upgraded my K3 with the KIO3B interface, so my PC is now connected via the USB port on the radio.
> My question relates to the cabling for the complete K-line: K3S KPA500 
> KAT500 and P3 The cabling diagrams, even in the latest KAT500 manual, show the PC connected via the PC jack on the KAT500.  As noted, my K3 with KIO3B is connected to a PC via the USB port on the radio.  Which connection should I be using?  What difference does it make?
> 
> I also need to get band data to my Ultrabeam antenna controller (like a Steppir).  Where should I sniff the band data and will a simple Y cable do that?
> 73, David G3WGN  M6O