Heathkit part number is 411-843. Parts list has AND, BECKMAN, and HAMLIN but no internet matches. Thoughts? Gary H. Harmon Jr 6003 Archwood San Antonio, TX 78239-1504 (210) 657-1549 home (210) 884-6926 cell gharmon at idworld.net <mailto:gharmon at idworld.net> k5jwkgary at Gmail.com