diff --git a/Aircraft/Instruments-3d/SCR-522C/Dialogs/radios.xml b/Aircraft/Instruments-3d/SCR-522C/Dialogs/radios.xml
index 46dc1df03..b5dcfb37c 100755
--- a/Aircraft/Instruments-3d/SCR-522C/Dialogs/radios.xml
+++ b/Aircraft/Instruments-3d/SCR-522C/Dialogs/radios.xml
@@ -2,7 +2,7 @@
 
 <PropertyList>
     
-    <name>radios</name>
+    <name>SCR-522C-radio</name>
     <width>550</width>
     <modal>false</modal>
     <layout>vbox</layout>
@@ -56,7 +56,7 @@
                 <label>Channel</label>
                 <live>true</live>
                 <!--<format>%.2f</format>-->
-                <property>systems/comm/SCR-522C/frequencies/channel</property>
+		<property>/instrumentation/comm/SCR-522C/frequencies/channel</property>
             </text>
             <text>
                 <!--<label>xxxxxxx</label>-->
diff --git a/Aircraft/Instruments-3d/SCR-522C/Nasal/SCR-522C.nas b/Aircraft/Instruments-3d/SCR-522C/Nasal/SCR-522C.nas
new file mode 100644
index 000000000..c03d5ff71
--- /dev/null
+++ b/Aircraft/Instruments-3d/SCR-522C/Nasal/SCR-522C.nas
@@ -0,0 +1,150 @@
+#####################################################################################
+#  This script provides the gui to set up the TR1133/SCR-522C radio                 #
+#  using a BC-602-A control box                                                     #
+#                                                                                   #
+#  Author Vivian Meazza   June 2011                                                 #
+#                                                                                   #
+#  mods   Hal V. Engel    June 2011                                                 #
+#                                                                                   #
+#####################################################################################
+
+# ================================ Initalize ====================================== 
+# Make sure all needed properties are present and accounted 
+# for, and that they have sane default values.
+
+var channelA_node = props.globals.initNode("instrumentation/comm/channels/A-mhz", 0, "DOUBLE");
+var channelB_node = props.globals.initNode("instrumentation/comm/channels/B-mhz", 0, "DOUBLE");
+var channelC_node = props.globals.initNode("instrumentation/comm/channels/C-mhz", 0, "DOUBLE");
+var channelD_node = props.globals.initNode("instrumentation/comm/channels/D-mhz", 0, "DOUBLE");
+
+var channel_selected_node = props.globals.initNode("instrumentation/comm/SCR-522C/frequencies/channel-selected", 0, "INT");
+var tr_node = props.globals.initNode("instrumentation/comm/SCR-522C/tr", 0, "INT");
+props.globals.initNode("instrumentation/comm/SCR-522C/frequencies/channel", "", "STRING");
+props.globals.initNode("instrumentation/comm/SCR-522C/mask", 0, "BOOL");
+props.globals.initNode("instrumentation/comm/SCR-522C/tr-lock", 0, "BOOL");
+
+var comm_selected_node = props.globals.getNode("instrumentation/comm/frequencies/selected-mhz", 1);
+var comm_standby_node = props.globals.getNode("instrumentation/comm/frequencies/standby-mhz", 1);
+var comm1_selected_node = props.globals.getNode("instrumentation/comm[1]/frequencies/selected-mhz", 1);
+var comm1_standby_node = props.globals.getNode("instrumentation/comm[1]/frequencies/standby-mhz", 1);
+
+var channel = ["OFF","A","B","C","D"];
+setprop("instrumentation/comm/SCR-522C/frequencies/channel", channel[channel_selected_node.getValue()]);
+
+var Radio = gui.Dialog.new("sim/gui/dialogs/SCR-522C/dialog",
+                           "Aircraft/Instruments-3d/SCR-522C/Dialogs/radios.xml");
+
+# gui.menuBind("radio", "dialogs.Radio.open()");
+
+# override controls.ptt
+
+controls.ptt = func {    
+    # T/R/REM set to REM remote ptt switch controls transmitter
+    # print("intercept ptt for BC-602-A");
+    if (getprop("instrumentation/comm/SCR-522C/tr") == 0 and                       # set in REMote ptt switch mode
+        getprop("instrumentation/comm/SCR-522C/frequencies/channel-selected") > 0) # and radio is on
+       setprop("instrumentation/comm/ptt", arg[0]);                                # let remote ptt control transmitter
+    else                                                                           # otherwise
+       setprop("instrumentation/comm/ptt", 0);                                     # the remote ptt does nothing
+}
+
+# =============================== listeners ===============================
+#
+
+var listenChannelSelected = func(n) {
+    var channel_no = n.getValue();
+
+    if (channel_no == nil) channel_no = 0;
+
+    # print("channel", channel_no, " ", channel[channel_no]);
+    setprop("instrumentation/comm/SCR-522C/frequencies/channel", channel[channel_no]);
+    if (channel_no == 1) {
+        setprop("instrumentation/comm/frequencies/selected-mhz", getprop("instrumentation/comm/channels/A-mhz"));
+        setprop("instrumentation/comm/frequencies/standby-mhz", getprop("instrumentation/comm/channels/A-mhz"));
+    }
+    else if (channel_no == 2){
+        setprop("instrumentation/comm/frequencies/selected-mhz", getprop("instrumentation/comm/channels/B-mhz"));
+        setprop("instrumentation/comm/frequencies/standby-mhz", getprop("instrumentation/comm/channels/B-mhz"));
+    }
+    if (channel_no == 3){
+        setprop("instrumentation/comm/frequencies/selected-mhz", getprop("instrumentation/comm/channels/C-mhz"));
+        setprop("instrumentation/comm/frequencies/standby-mhz", getprop("instrumentation/comm/channels/C-mhz"));
+    }
+    else if (channel_no == 4){
+        setprop("instrumentation/comm/frequencies/selected-mhz", getprop("instrumentation/comm/channels/D-mhz"));
+        setprop("instrumentation/comm/frequencies/standby-mhz", getprop("instrumentation/comm/channels/D-mhz"));
+    }
+}
+
+var listenTr = func(t) {
+    var tr = t.getValue();
+    # print("tr ",tr);
+
+    if (tr == nil) tr = 0;
+    if (tr == 2 and getprop("instrumentation/comm/SCR-522C/frequencies/channel-selected") > 0)
+        setprop("instrumentation/comm/ptt", 1);
+    else if (tr == 1)
+        setprop("instrumentation/comm/ptt", 0);
+}
+        
+var listenTrLock = func(i) {
+    var tr_lock = i.getValue();
+    # print("tr_lock");
+
+    if (tr_lock == nil) tr_lock = false;
+    if (tr_lock)
+        setprop("/instrumentation/comm/SCR-522C/tr", 2);
+    else if (getprop("/instrumentation/comm/SCR-522C/tr") == 2)
+        setprop("/instrumentation/comm/SCR-522C/tr", 1);
+
+}
+
+var SCR_522C_init = func(){
+
+    print ("initializing SCR-522C ...");
+
+    var channelA_init = comm_selected_node.getValue();
+    var channelB_init = comm_standby_node.getValue();
+    var channelC_init = comm1_selected_node.getValue();
+    var channelD_init = comm1_standby_node.getValue();
+
+    channelA_node.setValue(channelA_init);
+    channelB_node.setValue(channelB_init);
+    channelC_node.setValue(channelC_init);
+    channelD_node.setValue(channelD_init);
+
+    comm_selected_node.setValue(0);
+    comm_standby_node.setValue(0);
+    comm1_selected_node.setValue(0);
+    comm1_standby_node.setValue(0);
+
+    # over ride F12
+    setprop("input/keyboard/key[268]/binding/dialog-name", "SCR-522C-radio");
+    setprop("input/keyboard/key[268]/binding/command", "dialog-show");
+
+    # Disable the menu item "Equipment > radio" so we use our own gui: " > Radio".
+    # print("Disabling Menu: Equipment -> Radios GUI");
+    # override default radio menu
+    gui.menuEnable("radio",0);
+    setprop("sim/bindings/menu/binding[35]/dialog-name", "SCR-522C-radio"); 
+    setprop("sim/menubar/default/menu[5]/item[3]/binding/dialog-name", "SCR-522C-radio");
+    setprop("sim/menubar/default/menu[5]/item[3]/name", "SCR-522C-radio");
+    gui.menuEnable("SCR-522C-radio",1);
+
+    # gui.menuBind("radio", "dialogs.Radio.open()");
+
+
+# =============================== start listeners ===============================
+#
+
+    setlistener("instrumentation/comm/SCR-522C/frequencies/channel-selected", listenChannelSelected, 1, 0);
+
+    setlistener("instrumentation/comm/SCR-522C/tr", listenTr, 1, 0);
+      
+    setlistener("instrumentation/comm/SCR-522C/tr-lock", listenTrLock, 1, 0);
+
+    # print("... done");
+
+} # end func initialize
+
+setlistener("sim/signals/fdm-initialized", SCR_522C_init);
\ No newline at end of file
diff --git a/Aircraft/Instruments-3d/SCR-522C/README b/Aircraft/Instruments-3d/SCR-522C/README
new file mode 100644
index 000000000..fa025e145
--- /dev/null
+++ b/Aircraft/Instruments-3d/SCR-522C/README
@@ -0,0 +1,20 @@
+To enable full functionality of the SCR-522C/TR1133 radio there are several things 
+that you will need to do.  
+
+First you will need to add the following to the <nasal> section of your *set.xml 
+file.  
+
+<file>Aircraft/Instruments-3d/SCR-522C/Nasal/SCR-522C.nas</file>
+
+This will enable the F12 key to bring up the frequencies dialog. It will also over ride the 
+Equipment --> radios menu item so that it brings up the correct menu for the SCR-522C/TR1133
+radios.
+
+For dark conditions when cabin/cockpit illumination is used all of the radio models object respond to 
+
+<property>/controls/lighting/cabin-norm</property>
+
+If you are using a different property for you cabin/cockpit lights you will need to map your property 
+to /controls/lighting/cabin-norm.
+
+ 
\ No newline at end of file