It's the reference to termination resistors in the SPX data sheet that bothers me. Tom G3OLB K1FZ wrote: <The antenna in a simpler single dipole configuration has the wire ends tied with a perimeter wire to give very wide frequency banding. For a modern version of the old T-top see. http://www.spx.com/en/tci/pd-613t-and-f-broadband-dipole-antennas/>