[BC] Shively Vertical Antenna question

[Mark Humphrey]

There's a non-comm atop Camelback Mtn. in the Poconos that recently
installed a Shively 6513 with two vertical dipoles, each twisted 0.03
degree off vertical.  This produces a vertically-polarized ERP of
4,000 watts and horizontally-polarized ERP of 1.04 watt.  With this
miniscule twist, the horizontal power gain is 0.0009!

If this sounds crazy (and it IS crazy), see the test report:

http://svartifoss2.fcc.gov/prod/cdbs/forms/prod/getattachment_exh.cgi?exhibit_id=237992

However, if you're operating in the NCE reserved band in this area,
sometimes you must do some crazy, twisted things to satisfy the
requirements of 73.525  -- and keep WPVI-TV 6 from raising a stink.

Mark

> RH of WPIO Radio wrote:
>
> >Can anyone offer a reason why the Shively 6510 Vertical only
> >polarity antennas are not straight up and down like a normal
> > vertical dipole antennas.
> >And....wouldn't that off-axis from vertical cause some
> >inadvertent horizontal polarity to be radiated?