[TowerTalk] SteppIR

[Joe Subich, W4TV]

Bob, 

Obviously you have not done the work.  I have just rerun the models 
of the BV205, Hy-Gain 205 and the 4 element SteppIR in YO and the 
results are unequivocal. 

Both the Hy-Gain and BV designs give up maximum gain and front to 
back in order to obtain better performance  across the entire band 
(the N6BV design does a better job as a result of being computer 
optimized).  The SteppIR does not have to make those compromises 
as a result of its ability to retune at each frequency.  

If you want to compare any four or five element 32 or 43 foot 
boom 20 meter monobander optimized only for gain at a single 
frequency to a four element steppIR optimized for gain at the 
same frequency, there will be less than .25 dB difference.  That's 
simple physics (electromagnetics).  Don't give me the BS that a 
similarly sized monoband antenna will trash the SteppIR - cause 
it's simply is not possible.  

If you want significantly more gain, be prepared to go with a boom 
that is 50 to 100 percent longer - it's pure electromagnetics and 
has been documented in amateur literature for more than 30 years 
(start reading Lawson, Leeson, etc.). 

73, 

   ... Joe, W4TV 
 


> -----Original Message-----
> From: towertalk-bounces at contesting.com 
> [mailto:towertalk-bounces at contesting.com] On Behalf Of Bob Maser
> Sent: Friday, June 29, 2007 12:00 PM
> To: Joe Subich, W4TV; 'Carl Smidt'; towertalk at contesting.com; 
> SteppIR at yahoogroups.com
> Subject: Re: [TowerTalk] SteppIR
> 
> 
> Joe, have you been smoking weed again?  It's affecting your 
> brain.  Your 
> logic makes no sense at all. A 4 element on a 34 foot boom at 
> the same 
> height and optimized with YO or some other optimization program will 
> outperform the SteppIR if both antennas are reasonably close 
> by.  You sound 
> like someone trying to justify spending all that money.  
> Better you should 
> light some candles and pray that the element drive motors stand up.
> 
> Bob W6TR
> ----- Original Message ----- 
> From: "Joe Subich, W4TV" <w4tv at subich.com>
> To: "'Bob Maser'" <bmaser at tampabay.rr.com>; "'Carl Smidt'" 
> <xveoneov at primus.ca>; <towertalk at contesting.com>; 
> <SteppIR at yahoogroups.com>
> Sent: Friday, June 29, 2007 10:30 AM
> Subject: RE: [TowerTalk] SteppIR
> 
> 
> >
> > Bob,
> >
> >> For any specific band most monoband antennas will stomp a SteppIR,
> >> assuming that the boom length is the same or longer than 
> the SteppIR.
> >
> > That's complete nonsense unless you are comparing something like a
> > 60 foot boom monobander.  YO shows a 1 dB advantage for the 
> 4 element
> > over the 205CA because the 205CA gives up gain to maintain 
> usable SWR
> > across the entire band.  The N6BV optimized design (BV205) 
> is about .5 dB
> > below the SteppIR.
> >
> > It takes a much larger monobander (6 el 60 foot on 20, 6 el 48 foot
> > on 15 and 7 el 48 foot on 10) to achieve at least 1 dB more 
> gain than
> > the SteppIR.  Sure, one could put up a set of WA3FET (K3LR) 
> OWA antennas
> > for each band but not on one tower.
> >
> > 73,
> >
> >   ... Joe, W4TV