Before World War II the FM radio band was just below 50 Mc. Read all about it. If you have such a radio, you might want to build this converter. It will let your old set receive the modern FM band (88 to 108 Mc.). This design is based on an article I wrote for Radio Age. You must wind L1 yourself. Use any cylindrical object that is just under 1/2 inch in diameter. I used a thick pencil from my son`s grade school class, but a magic marker or a large drill bit will work just fine. Wind 6 turns with #18 or #20 wire. Wind the wire tightly on the cylinder and then slip the wire off.