Update magloop.html

Clarified notes about where measurements are taken from.

magloop.html

@@ -78,11 +78,11 @@
             behaviour of a magloop antenna. This would help a radio amateur to decide on the characteristics for the build. <br>-- 73 de VK3CPU<br><br>
             <u><b>Inputs via the slider and radio widgets:</b></u>
             <ul> 
-                <li>&#8960a : Conductor diameter in millimeters (mm) or inches (").</li>
-                <li>&#8960b : Loop diameter in meters (m) or feet (').</li>
+                <li>&#8960a : Conductor diameter in millimeters (mm) or inches ("). (Measured between the conductor centers.)</li>
+                <li>&#8960b : Loop diameter in meters (m) or feet ('). (Measured between the conductor outer surfaces.)</li>
                 <li>N : Number of turns or loops.</li>
                 <li>c/a : is the spacing ratio; based on 'c' being the inter-winding spacing for multi-turn loops measured between conductor centers, and 'a' is the conductor diameter. (Must be >= 1.1) 
-                    A low-value will increase the resistance due to the proximity effect.</li>
+                    A low-value will increase the resistance due to the proximity effect. (Ignore for single-turn loops.)</li>
                 <li>Tx : The transmit power in Watts. This affects the predicted voltage across the capacitor (Vcap), and the RMS loop current (Ia).</li>
                 <li>Metric or Imperial : selects the measuring system.</li>
                 <li>Cu or Al : selects the type of metal conductor (annealed copper or aluminum).</li>