Per requests, here are some photos of the 1946 R-13: http://home.netcom.com/~arc5/R13/R13a.JPG http://home.netcom.com/~arc5/R13/R13b.JPG http://home.netcom.com/~arc5/R13/R13c.JPG The resistor near the center of this photo is the part in question: http://home.netcom.com/~arc5/R13/R13d.jpg 73 Dave AB5S