There is going to be a difference in coverage between the 408 (6.6 db) and
420 (9.2 db) Not sure what gain is for 440-450 since DB did not make
antenna for this segment. Maybe special order.
We've seen world of difference between high antennas from 4 bay to 8 bay.
Some say only 3 db, but with bigger feedline or better antenna things
improve noticably.
408 is good antenna and still will perform.
73, ron, n9ee/r
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