-- I had the same problem with my K-3 and found that the cable that runs to K-3 had bad connection. I sprayed with contact cleaner and no longer a problem. I had problem after doing upgrades. The early cables also had some problems, I don't know how old your K-3 is. Buddy, KJ4ZSI
Just relocated the station and reconnected everything up. K3 and the P3 act normally all displays are right, but no IF signals from the K3? Coax cable checks out good. Where did I lose the signal????