I second the request to add TX delay to KX3. Now that delay is < 5 mS. I found that by seeing hot switching with Expert 2k-fa equipped with vacuum relays. Ignacy, NO9E -- View this message in context: http://elecraft.365791.n2.nabble.com/Al-572-and-KXPA100-tp7585615p7585620.html Sent from the Elecraft mailing list archive at Nabble.com.