You shouldn't try to run both the P3 and the W2 from the K3 12V DC OUT jack. The P3 plus the 6 meter preamp is OK. Alan N1AL On Fri, 2010-10-29 at 10:23 -0700, Richard Thorpe wrote: > Should I get the power for the P3 at the back of my K3? I already have the 6mtr pre and the W2 connected there, a 3 into 1 RCA female would be needed. Thank you. > > k6cg