How many steps above and below center frequency?

David Spoelstra
 

Clint-

On your website you list two frequency steps above and below the center frequency for the birds. Some sites like KD0HKD list three steps above and below the center. In my research I've actually seen other people list four steps above and below the center. Why the differences? With an HT and an Arrow antenna, is two steps above and below good enough?

Thanks!
-David, N9KT

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