diff --git a/assets/js/sections/qso.js b/assets/js/sections/qso.js
index c92a103f..99db8aea 100644
--- a/assets/js/sections/qso.js
+++ b/assets/js/sections/qso.js
@@ -1,4 +1,11 @@
 $( document ).ready(function() {
+	$("#sat_name").change(function(){
+		var sat = $("#sat_name").val();
+		if (sat == "") {
+			$("#sat_mode").val("");
+			$("#selectPropagation").val("");
+		}
+	});
 
 	$('#input_usa_state').change(function(){
 		var state = $("#input_usa_state option:selected").text();