[BC] Ground system

[Craig Healy]

> The solution is an above-ground counterpoise made from Alclad or
> similar materials. For AM nondirectional antennas, four 1/4
> wavelength-long radials, insulated at their ends, and supported
> by utility poles have been proved to make the required FCC
> inverse-distance field intensity, and the far-field is nearly
> circular.

That is done on the 640 station in Philadelphia, from what I'm told.  One 
issue is significant voltage at the end and the fact that the radials are 
quite bandwidth-specific.

Would it be better to use six elevated radials, but connect pairs at the 
ends so there are three sets of more broadband versions?  Picture the dipole 
antennas used for VHF and UHF that are essentially triangular.  An 
effectively wide radial may be better.

Craig Healy
Providence, RI