[TowerTalk] Holy SteppIR!

[StellarCAT]

huh?

He can adjust the frequency but not the radiation angle. This is 
strictly a function of height above ground for the major lobe. 
Or are you saying he has a coax phasing line that is adjustable? 
That is the only thing that could change the relative phase of 
one antenna to another - changing the resonant frequency of the 
elements only changes the gain and f/b.

g.


----- Original Message ----- 
From: "Jim Lux" <jimlux at earthlink.net>
To: "StellarCAT" <RXDesign at ssvecnet.com>; "tower" 
<towertalk at contesting.com>
Sent: Tuesday, December 27, 2005 10:15 AM
Subject: Re: [TowerTalk] Holy SteppIR!


: At 10:41 AM 12/26/2005, StellarCAT wrote:
: >agreed... no disrespect to this guy but this is WAY too high 
(if
: >the top is at 220' as the cover page shows). Had he placed it 
so
: >the bottom antenna was at say 45 - 55' then it would have 
been a
: >killer array... but as is it will not perform up to its
: >potential a good share of the time. Radiation angle is the 
key -
: >not gain (although having both works extremely well). When 
the
: >angle is right however nothing should beat it for the most 
part.
:
:
: Bear in mind that with all those elements independently 
adjustable, there's
: no reason why he can't form a beam at any arbitrary angle. 
Considering
: just one stack, it's essentially 9 independently adjustable 
elements.
:
: Consider this.  You could configure the center (driven) 
element of each
: antenna so that the phases adjust to shoot a beam straight up.
:
: or, at 45 degrees or 30 degrees, or whereever you want to 
shoot it.
:
:
: Jim, W6RMK
:
: