[BC] Antenna Question

[Tom]

I would suspect, even if it IS certified, if the 
LPFM hasn't filed a CP to modify the authorized 
antenna, they're skirting NOAL territory -
the Shively is

"Polarization:
    Right circular."

The Phazor blithely states:

"The Phazor®  utilizes an advanced phase shifting 
element which radiates a signal in the horizontal 
plane that is 90 degrees out of phase with the vertical elements.

This simulates circular polarization. The Phazor® 
would be more accurately described as an 
elliptical polarized collinear antenna. Being 
that most of the gain is in the vertical plane for maximum range."

Although no specific data seems to be available 
for the Phazor, it's a development of their Dominator;

"The Dominator has about the same gain as four 
stacked circular polarized bays fed in phase and 
mounted over a forty foot section of tower. "

So:  they may be over on V-ERP; they may be under 
on H-ERP; or both... and/or way off on authorized 
TPO, as well.  Depends on the H/V ratio of the 
Phazor... I suppose if it's close enough to unity 
(doubtful, based on the quoted description 
above), they might get away with using 
it......  (Shively quotes a nominal gain for four 
bays full wave at 2.04, or 3.1 dB, so the Phazor, 
at 3 dB gain = 2 kw ERP for 1 kw in - but without 
the ratio, <I'd say the ERP is V, based on looks 
alone> just what the breakdown is would be a guess)

I seriously doubt it could be used for a 
full-power station; maximum input power is 1 kw; 
although there's a 3-kw in version of the 
Dominator... the caveat being, of course, that 
the Dominator is STRICTLY vertical.

Sidebar:  Would one of these Dominators, fed from 
a power divider, overcome the vertical polarity 
pattern distortion of typical CP antennas, when 
used with a standard H-only antenna?  Envision a 
four-bay ring pole mounted, with a Dominator 
mounted atop the pole.  Might be interesting to experiment with.....



Paul B. Walker, Jr. wrote:
>Is this antenna http://virtual-comm.com/ants/phazor.html certified for use
>by LPFM or Full Power NCE & Commercial FM's in the USA? An LPFM along
>Florida's East Coast is using it even though they are authorized for a
>Shively 6812B antenna and not the Norwalk "Phazor".