jazz i wish you had not told me that lol:sneaky2:
"NAPCO ®"
extended ½λ over ¼λ phase coherent antenna,
a design offering mechanical and electrical advantages over prior art antennas,
it has long been understood that in prior art antennas the 5/8wave ground-plane provides the highest usable gain on the horizon of any single element vertical and that extending beyond ⅝λ introduces high angle lobes to the radiation pattern while reducing energy in the important low angles towards the horizon,
here at "NAPCO®" we approached the problem of errant radiation in the extended radiator with an open mind and an eye towards the "open sleeve",
years of field tests demonstrated to us that the problems associated with prior art antennas could be overcome while at the same time provide a more structurally sound assembly, the means to achieve this is nothing new to those skilled in the art but it is unconventional and seldom used even less well understood,
engineers at "NAPCO®" understood the problems of simply extending radiator length beyond ⅝λ,
utilising techniques known to professionals since the 1940's "NAPCO®" extended the radiator and upswept the radials to contain the out of phase radiation from the lower portion of radiator while at the same time adding constructive radiation from the upswept radials in a phase coherent none apparent Co-linear effect,
these actions provide several improvements over conventional antennas,
it is desirable that an antenna should be able to handle harsh weather conditions and it can,
there are no large horizontal radials under high mechanical stress,
the "NAPCO®" uses low stress .063" and .058" wall aircraft grade 6061-t6 drawn tube in its radials and hoop occupying a mere 30" of lateral space supported securely by virtually bullet proof kevlar/micro-dyneema composite spreaders, not only is the upswept design stronger its also easier to accommodate in the living environment,
in its central monopole the "NAPCO®" uses the same aircraft grade .058" wall 6061-t6 drawn aluminum reinforced at critical load points with 6061-t6 and 6063-t832 drawn tube,
"bob-cad®" structural analysis was used to create an optimum load curve along the element taper ensuring a class leading highest load bearing capacity per unit length,
tube diameters range from 1-5/8 - 1/2", giving the strongest vertical made from the highest quality materials available in citizens band antennas,
the compact design is less influenced by its environment than conventional antennas giving superior high power performance at any height above ground in a wider range of conditions than any currently available single element vertical antenna,
the "NAPCO®" can be supplied with gamma options to suit your station and your wallet, much like burger-king you can "have it your way" from a Teflon 1500w to a costly high power vacume variable gamma we can in most circumstances feed your needs and desires,
"NAPCO®" like andrex, its longer and stronger,
its how antennas should be made!
