Original directions taken from the 2005 QST Article A Backpacker's Delight - The folding J-Pole by KA0ZLG (Link is valid for ARRL members only).
The J-Pole that I made was not a folding J-Pole. It was fabricated using 1/2" copper pipe and 3/4" copper clamps were used for connection points to the antenna. The center of the coax goes to the driven element.
|to screws on clamp
The clamps were turned so that the coax was connected between the driven element and the matching stub.