diff --git a/doc/user_guide/wsjtx-main.adoc b/doc/user_guide/wsjtx-main.adoc
index d81f8c23f..088b43a29 100644
--- a/doc/user_guide/wsjtx-main.adoc
+++ b/doc/user_guide/wsjtx-main.adoc
@@ -191,11 +191,6 @@ include::faq.adoc[]
 == Protocol Specifications
 include::protocols.adoc[]
 
-
-[[TXRX]]
-== Implementation Details
-include::tx-rx.adoc[]
-
 ////
 [[TROUBLE_SHOOTING]]
 == Troubleshooting