shockwave,
thanks for corresponding with the sirio engineers, thats music to my ears.
i agree with what sirio say about how the monopole and radial sleeve operate to produce a lower radiation angle than any 5/8wave, i agree you can manipulate radiation angle through changing radial-monopole length ratios,
thats what i have been saying since we started talking about the design about 6 years ago and imho it explains cebik's none aparent colinear array statement to me,
i have a problem understanding how the mast radiates in phase,
i don't doubt there will be some mast/feedline radiation when the antenna is elevated and not isolated, i don't understand how that radiation could be in phase on a long mast but i am always looking to learn 
,
i have some field tests and current measurements to do in this area of mast/feedline radiation,
avanti did not lie, they were indeed ahead of the cb antenna game,
the patent is not just salesman speel as claimed by the j-pole snakeoil camp,
they should understand that a 5/8wave with fat conductors is nothing special with regards to performance and forget the lossy gamma/j-pole nonesense before they will ever catch up,
i guess backpeddling is harder than it looks even when theres people out here willing to help,
taking the brute force and ignorance method of building grid driven tetrode amps to compensate for antenna performance is like putting a blower on your car because the brakes are binding 
.
