[TowerTalk] How can a SteppIR Perform So Well?

[Keith Dutson]

Here is some more comparison information that will be helpful to any
prospective buyer:

		#el/band	Turn Radius	Weight	pwr	wind rating
wind area	price
SteppIR	3			19.7	42lb		2KW		100
6.1	$1198
C-3E		2			19.8	34lb		5KW
100		5.8	$735

Keith NM5G

[snip]

The three element SteppIR is a valid comparison to your C3 ... 
the SteppIR has half the elements on a boom that is two feet shorter.  Yet
the SteppIR outperforms the C3 in model studies and range tests using the
K7LXC/N0AX protocols. 

> The SteppIR 3 element yagi vs Force 12 C-3E (74' above ground)
>
>                  C-3E           SteppIR             elev.
>    Band        Gain   F/R     Gain     F/R 
>     20         12.6    16     13.4     20        13 degrees
>     17         10.3     7     13.8     21        10 degrees
>     15         12.8    17     14.2     21         8 degrees 
>     12          9.8     9     14.8     14.5       7 degrees
>     10         13.2    21     15.2     11         7 degrees 
>      6             n/a        16.0     20         4 degrees 
>
> The C-3E numbers are Force-12 published specifications and confirmed 
> by modeling with AO.  The SteppIR numbers are from modeling in AO/YO 
> (6 meter values use the optional passive elements).

73, 

   ... Joe, K4IK 
 

_______________________________________________

See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.

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