I'm hearing birdies in the following frequencies: 28.443 21.273,1 14.186.6 (the most important one with s3) 7.068.5 3.583,2/3.786.0 Also I've done the VCO calibration but the birdies in main and sub.receiver remains. S/N: 38xx. Anybody has the same birdies, any advice to fix it?. Advanced thanks Eugeni - EA3QP