Thanks for stopping by. The "PCB" is for "Printed Circuit Board". Been designing them for many years. QTH is northern New Hampshire, 70 miles from the Canadian boarder. Operate on 75m, 40m, 20m, and 2m almost always modile. Maybe I'll catch you on the air waves. 73's and enjoy the site. Caboose QSLK1PCB QSL