Ok, the ref + dir on my modified F12 340N...3 el 40m yagi are insulated from the boom. Whats the easisest way to dc grnd the eles..... and also leave the insulator between ele halves intact??? Resist
The reason the parasitic elements are isolated from the boom is that the boom would detune them. AFAIK, no one has figured out a way to model elements shorted to a boom, and experimentally tuning an
Virtually all modeling codes based on NEC will handle an element connected to the boom. I model antennas on complex structures (spacecraft) using NEC, and that's significantly more complex than a rig
Like most modern day contest stations, I built my Yagis with insulated elements and direct feed. According to W8JI's site, grounding the elements makes little difference in precipitation static. http
Does anyone know of a modern NEC-designed yagi that does NOT use isolated elements? Perhaps there is some software that can accurately model the effect of the boom, but I suspect it's way out of the
On 10/28/19 12:40 PM, K9MA wrote: Does anyone know of a modern NEC-designed yagi that does NOT use isolated elements? Perhaps there is some software that can accurately model the effect of the boom,
Some JKantennas designs do not have insulated elements, eg the reflector on my 2L 80m yagi and the 40m. The heavily interlaced designs (eg Navassa) are insulated. All are NEC4 designs according to di