[Elecraft] [P3] P3+Microham USB III - 13.8v connection

[Giuseppe Sorrentino]

Hy to all, perhaps there's someone has already done this. I must wire the microham usbIII interface to my K3/P3. Now i have the P3 that take the 13.8v from the back of my K3 but also the interface has a cable to connect to that jack on the back of K3. Is it a particular reason to leave the P3 cable on the 13.8 conn on the back of K3 and wire the microham to a power supply or nothing particular???
 
TNX
 
MERRY CHRISTMAS AND A HAPPY 2012 TO ALL

IZ2NYY
Giuseppe "Pippo" Sorrentino
Milano ITALY