However, in contrast to the single tower non-directional antenna used on 1400 kHz, operation on 850 kHz required constructing a large and complicated nine-tower directional array, sited on  in Paint Township, Somerset County, Pennsylvania.
While a single tower non-directional antenna was used on 1400 kHz, operation at 850 kHz necessitated building a large and intricate nine-tower directional array situated in Paint Township, Somerset County, Pennsylvania.