On Mon Apr 19 2010 at 1419 EDT, Eugeni (EA3QP) wrote ... "I'm hearing birdies in the following frequencies ... any advice to fix it?" -- Eugeni, You can use the "SIG RMV [T]" (tech mode) config menu command to remove birdies from just your main receiver. See page 58 in the latest K3 Operator's Manual for full details. 73, Gary KI4GGX K3 #2724