diff --git a/README.md b/README.md
index 7c2f194..3492219 100644
--- a/README.md
+++ b/README.md
@@ -41,9 +41,7 @@ Landline telegraphs use "closed circuits" for communications; if you have built
 you may also use the [loop interface](http://kob.sdf.org/morsekob/docs/loopinterface.pdf).
 
 Connection of a morse key:
-Serial PIN: 4 & 6
 [layout of pins](http://techpubs.sgi.com/library/dynaweb_docs/0650/SGI_Admin/books/MUX_IG/sgi_html/figures/4-2.serial.port.con.gif)
-Connecting the palm radio: keep an eye on the grounding :)
 
 |  RS232    | DB9    | Function |   
 | :-------- |:-------| :------  |