diff --git a/Ideas.md.gpg b/Ideas.md.gpg
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Binary files a/Ideas.md.gpg and b/Ideas.md.gpg differ
diff --git a/tech/SWR.wiki b/tech/SWR.wiki
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--- a/tech/SWR.wiki
+++ b/tech/SWR.wiki
@@ -1,4 +1,8 @@
 = SWR =
 
 Standing Wave Radio (SWR) is a phenomenon where power sent down a feed line is
-reflected back by the antenna
+reflected back by the antenna.
+
+This only occours when the impedance of the antenna and the feed line do not
+match. This is often caused by having the incorrect sized antenna for the
+signal.