Courtesy of my friend Fred Olsen who "knows things", here's w website that shows what's inside those Central Packaged Electronic Circuits we all stumble onto from time to time (in places like Globe Kings, fer instance): http://www.peacockcollectibles.com/radios2/radios3/pec.htm http://www.peacockcollectibles.com/radios2/radios3/pec2.htm 73, Bob W9RAN