Abstract: An inductor is developed on an electronic circuit board by forming plural parallel series of holes and plating a conductor pattern on both sides of the board in association with the holes. The holes are plated through with conductive material and are electrically connected by connective segments from the conductive pattern in the form of elongated straps. Each strap extends between a hole in a first series of holes to a hole in the second series of holes. The straps are arranged to produce a conductive pattern in a flattened generally helical form. The holes are drilled oversized so that, after plating, the remaining opening corresponds to a standard lead diameter. Connections may be made between a selected number of turns of the coil by inserting the leads of a circuit component in holes corresponding to the proper number of turns.