art wrote:
On 7 Nov, 07:07, John Smith wrote:
art wrote:
Most hams who strive for maximum radiation that is horizontally
polarised place the radiator parallel to the earths surface.
That is an example of herd mentallity.
When the vectors of radiation fields and "curl" are summated
the resulting vector is NOT along the axis of the radiator.
For maximum horisontally polarised radiation it is this
vector that must be parallel to the earths surface.
By the way Maxwell confirms this but hams chose
to ignore it.
Yup, herd mentallity!
Art
Well, that AND the fact that a 160m antenna can be difficult to
vertically polarize!
Regards,
JS
No it isn't. You slow the wave by
winding helices. Buy a tesla coil
(secondary coil) feed the end wires
and start radiating
Art
Even a vertical DLM antenna can be a challenge, depending on any certain
individuals property/lot, neighbors and other factors ...
At 20m on down this becomes MUCH more practical ...
And, most physically short antennas introduce degraded performance--the
DLM being a notable exception.
Regards,
JS