Gary, I am not sure about all bands, but I have done it with 3 bands. I run my 160 inverted L, a vertical for 80 and a vertical for 40 all off of the same feedline and ground radial system. At least for these three bands, they don't have a lot of interaction. My 4NEC2 model showed this, and my experience as I added each additional antenna wire required minimal or no adjustment of the previous elements. My wires are spaced about 12" apart. 73, Joel N9LQ
On Wed, Sep 19, 2018 at 3:35 PM Gary Smith <g...@ka1j.com> wrote: > My HF antennas are all wire verticals; 20M > vertical, 30M vertical, 40M vertical, 80 > INV-V & 160 sloper. Using the Ameritron > remote coax switch it allows me to select > one of these antennas and this allows a > match to everything from 160-6 except for > 60 meters which I don't use anyway. All > are connected to the radial plate which > has maybe 40 or so 130' long radials. I > use the 160 sloper for 160, 12, 10 & 6M (I > now have a 7 el yagi for 6M) > > This latest thread has me wondering about > what would be likely to happen if I didn't > use the coax switch and instead ran all > the wires off a common feed-point? The > only think I can think of that jumps out > at me is the possibility of harmonics. > > Perhaps harmonics are not an issue? I've > long used a 40M antenna for 15M as well > with no complaints. I used to use a > Mor-Gain antenna as a Novice & General and > it was a multi band dipole which seemed to > work fairly well, but in the sunspot cycle > peak back in the late 70's a coat hanger > would let you work DX. > > 73, > > Gary > KA1J > > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband > _________________ Topband Reflector Archives - http://www.contesting.com/_topband