No, unfortunately it's not a mith. When an upper antenna is much larger and not enough far from the smaller one, althoug not resonant, something bad happens. In my experience (last one trying to inte
I agree with Mauri. Even when not resonant, bad things can and very often do happen if the antennas are too close. 73, Tom W8JI w8ji@contesting.com -- FAQ on WWW: http://www.contesting.com/FAQ/tower
How about the flip side of this? It seems that some "wisdom" I've heard indicates that a larger (i.e lower frequency) antenna underneath a smaller (higher frequency) antenna will look somewhat like a
You realize, of course, that you can buy those two antennas on the same boom, the C39XRN. The 40m driven element is between the 10 m reflector and the 15 meter reflector. 40m reflector is way out bac
Rather than listen to all of the speculation and "gut feelings" of the other respondents, why don't you just model the situation and find out? With the money you're spending on this, a few bucks for
You can put lower frequency elements BEHIND higher frequency elements because the high frequency reflectors isolate other elements to the rear. That is NOT the case for vertical separation where the
Read the description carefully. On the C39, the 40 DE is BETWEEN the 15 DE and the 15 reflector, NOT behind the 15 reflector. They HAVE had to deal with removing the 21 mhz resonance from the 40 "N"
Hi Fellows, This seems to be going in circles. Has anyone modeled this or measured it? It is important to stress that even without resonance a large structure in the nearfield can affect performance
And Guys ..... If some one is modeling the shadowing effect could he also explore the situation where the top antenna is placed at right angles to the lower antenna. I am putting a C31XR and EF-240s