The "W8JI small verticals" that everyone has copied for this are naturally resonant on the 75/80 meter band as an aside. There is plenty of gain on 160 and well more than enough on 80 as RDF and not forward gain is the goal for the array. In the paper Joel and I did, we have both calculated and measured results for these antennas. Joel's first month results were also indicative as he worked several new countries the first week of operation, audible on the 8 circle and not on any previous antennas (beverage, transmit, etc). If you want to think of it as analogous to a 1/4 wave vertical, look at it this way. 4 elements are active at any one time. In our version these are 25 foot verticals and 4 of them are active so that is "a 100 feet of vertical" where as a 1/4 wave vertical is smaller capture area than that with on the order of 67 feet of vertical contributing to capture area. MORE than enough gain on 80 meters!
Bob HY On Thu, Feb 14, 2013 at 4:22 PM, Joel Harrison <[email protected]> wrote: > I do have an 80 meter version in addition to the 160 array and can report > there is plenty of "reserve" signal on 80 as well even after 600 ft of > feedline and splitting the signal to two receivers. > > 73 Joel W5ZN > > -- Bob McGwier Owner and Technical Director, Allied Communication, LLC Facebook: N4HYBob ARS: N4HY Faculty Advisor Virginia Tech Amateur Radio Assn. (K4KDJ) _________________ Topband Reflector
