That's of little help for all of us with non Elecraft Amps. Keith, XE3/K5ENS -- View this message in context: http://elecraft.365791.n2.nabble.com/KAT500-Help-with-KeyLine-Interrupt-on-KPA500-Video-tp7566844p7566905.html Sent from the Elecraft mailing list archive at Nabble.com.