Seams like it don't like high SWR I checked my SWR ( don't have the ATU but a external tunner) and it was 1.8:1 tweeked the tuner to lower the SWR and now every thing seems OK -- View this message in context: http://n2.nabble.com/reciever-does-quiet-after-tune-tp2453245p2453376.html Sent from the Elecraft mailing list archive at Nabble.com.