[Elecraft] K3s computer sound card and CAT control

[Brian Pietrzyk (ve3bwp)]

Sorry folks this has probably been asked a 1000 times before.

I’m connecting my new k3s to my mac for the first time. I’ve used MacLogger DX lots with other radios including my kx3.

Page 18 of the k3s manual describes the first function of the USB port as “Commands from logging/contesting software” as well as sound card i/o audio. Does this mean it supports CAT control as well as audio i/o on the one USB connection or do I still need to KUSB cable along side it for CAT control? 

I’m assuming the K3 utility only works with the KUSB to do firmware checks and such?

Also I have a P3 and I would like to keep be able to use the K3 utility connected to the rig. 

P19 of the manual if I read it correctly it looks like they are suggesting swapping out the (CBLP3Y) RG45 to DB9 Y cable for the (E980297) RJ45 to single DB9 and then connect the KUSB PC USB cable to the computer. So I’m confused why they would ever need the CBLP3Y “Y” cable in the first place? 

I’m trying to do the RTFM thing and even bought the John Cady book but some of this some of the rationale is still alluding me. 

All and any help would be a appreciated. 

Brian ve3bwp