diff --git a/magloop.html b/magloop.html
index 0ddd9c8..8d68139 100644
--- a/magloop.html
+++ b/magloop.html
@@ -270,7 +270,7 @@
                 return l_area;
             }
             
-            // Returns the loop area in square meters:
+            // Returns the perimeter length in meters:
             function getPerimeter() {
                 var l_perimeter = 0.0;
                 const width = loop_diameter_slider.value;
@@ -343,7 +343,7 @@
             }
 
             function radiationResistance(frequency) {
-                const wavelength = 3e8 / frequency;
+                const wavelength = 299792458.0 / frequency;
                 var retval = 0.0;
                 
                 if(shape == "circle") {
diff --git a/toroid.html b/toroid.html
index 2ab37a0..4c3445a 100644
--- a/toroid.html
+++ b/toroid.html
@@ -926,6 +926,7 @@
                             'T130' : { PN:'T130-6', A:33.02, B:19.81, C:11.10, W:28.9,  CC:0.0, le:8.28, Ae:0.698, Ve:5.78,  Al:9.6 },
                             'T106' : { PN:'T106-6', A:26.92, B:14.48, C:11.10, W:21.4,  CC:0.0, le:6.49, Ae:0.659, Ve:4.28,  Al:11.6 },
                             'T94'  : { PN:'T94-6',  A:23.93, B:14.22, C:7.92,  W:10.8,  CC:0.0, le:5.97, Ae:0.362, Ve:2.16,  Al:7.0 },
+                            'T80'  : { PN:'T80-6',  A:20.19, B:12.57, C:6.35,  W:5.95,  CC:0.0, le:5.14, Ae:0.231, Ve:1.19,  Al:4.5 },
                             'T68'  : { PN:'T68-6',  A:17.53, B:9.40,  C:4.83,  W:3.795, CC:0.0, le:4.23, Ae:0.179, Ve:0.759, Al:4.7 },
                             'T50'  : { PN:'T50-6',  A:12.70, B:7.70,  C:4.83,  W:1.79,  CC:0.0, le:3.19, Ae:0.112, Ve:0.358, Al:4.0 },
                             'T44'  : { PN:'T44-6',  A:11.18, B:5.82,  C:4.04,  W:1.33,  CC:0.0, le:2.68, Ae:0.099, Ve:0.266, Al:4.2 },