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RE: [BULK] - Re: [TowerTalk] New antenna system

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Subject: RE: [BULK] - Re: [TowerTalk] New antenna system
From: "Joe Subich, K4IK" <>
Date: Tue, 9 Nov 2004 13:53:11 -0500
List-post: <>

> From:
> Someone else commented their doubt that the SteppIR boom was 
> long enough to provide good front to back.  I can only say, "go to 
> someone's shack who has one or listen to someone reverse their 
> beam 180 degrees and you should be convinced."  Front to back is 
> very obvious and this beam is great.... the best I've had in 
> 47 years of hamming.

Actually, the boom is too long to provide high F/R on 10 meters, not 
too short.  F/R on 10 drops into the 10 to 15 dB range which is more 
than enough for most people (and as good as the measured F/R on the 
triband antennas in the K7LXC/N0AX report).  In exchange for the six 
dB or so of reduced F/R the SteppIR antennas pick up (depending on 
the antenna) between one half and one dB of additional forward gain 
across the operating range.  

I might have made a different choice and opted to put the three 
element yagi on a 12 foot boom, put the four element yagi on a 26 
foot boom and added a five element 40 foot boom antenna to the 
product line.  However, FM's choices are not only understandable, 
they probably work to the benefit of the end user by concentrating 
production, development and support on a smaller product line and 
result in a marginally lower unit cost. 


   ... Joe, K4IK 


See:  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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