Will the supplemental data for the TC-1, TC-2 and TC-3 work on the IT-17 tube tester?? 73, Gary H. Harmon, Jr. - K5JWK 6003 Archwood San Antonio, TX 78239-1504 210.657.1549h / 210.884.6926c/t "Retirement means every day is a Saturday except Sunday" http://www.grissomroadcoc.org