Jeff DePolo wrote: > There are a lot of unknown variables here, including, but not limited to the > size of the ground plane the antennas were mounted on, their heights above > the ground plane, the method of coupling to the ground plane (direct, mag > mount, etc.), matching networks' efficiencies, etc.. And more importantly, > was the 4 dB gain a peak value, or at 0 degrees elevation? > > Typically a 5/8 wave over a perfect ground plane should be a little more > than 3 dB better than a 1/4 wave on the horizon, but with so many unknowns > and so much variability in mobile installations, there doesn't seem to be a > definitive conclusion to be drawn here. Maybe Jim can provide more detail. > > --- Jeff
Yes...this was actually mounted dead center in the roof of a car (remember this was around 1966-68, the car was a 65 or 66 Impala-BIG roof) and measurements were taken and at the same height as the antenna. I don't remember the distance from the car however, probably at least 30', maybe as much as 100'. Oh, and 'mag mounts' didn't really exist much then...you either mounted the antenna in a hole, or you didn't have an antenna. -- Jim Barbour WD8CHL
