https://k3rrr.com/wp-content/uploads/2018/08/K3RRR-new-logo-K3RRR-K3TripleR-1030x464.png00https://k3rrr.com/wp-content/uploads/2018/08/K3RRR-new-logo-K3RRR-K3TripleR-1030x464.png2013-03-14 07:00:192013-03-14 07:00:19Introduzione al psk31 e all’rtty (parte prima)