As I recall, there is some kind of device that is used to tune an amp. It acts like a telegraph bug sending dots. What is it called and is it available commercially? 73, Gary H. Harmon, Jr. - K5JWK 6003 Archwood San Antonio, TX 78239-1504 210.657.1549h / 210.884.6926c "Retirement means every day is a Saturday except Sunday".