> -----Original Message-----
> From: jeremy-ca [mailto:km1h@jeremy.mv.com]
> Sent: Friday, June 29, 2007 2:02 PM
> To: Dick Green; towertalk@contesting.com
> Subject: Re: [TowerTalk] SteppIR
>
> Something is VERY wrong with those gain figures Dick. Are you adding
> ground
> gain?
>
> And if the F/B is real Im not at all impressed with either. I could
> demonstrate at least 20dB F/B and 30-35 dB over 200 kHz with my 20M 4el
> PV.
> Those tests were run many times when N6BV lived a few miles away in
> Windham.
> We also ran similar tests on my 15 & 10M versions. Id much prefer deep
> F/B
> nulls in DX pileups and not worry about perfect VSWR or losing a few
> tenths
> of a dB in gain.
>
> Carl
> KM1H
>
>
> ----- Original Message -----
> From: "Dick Green" <wc1m@msn.com>
> To: "'Bob Maser'" <bmaser@tampabay.rr.com>; "'Joe Subich, W4TV'"
> <w4tv@subich.com>; "'Carl Smidt'" <xveoneov@primus.ca>;
> <towertalk@contesting.com>; <SteppIR@yahoogroups.com>
> Sent: Friday, June 29, 2007 1:34 PM
> Subject: Re: [TowerTalk] SteppIR
>
>
> >I don't want to get in the middle of this, but I just ran EZNEC models
> > comparing the 4-el SteppIR and Force-12 EF-420 on 20m at 96'. The
> SteppIR
> > boom is 32'; the EF-420 boom is 30' (and presumably optimized.)
> Results:
> >
> > 4-el SteppIR Force-12 EF420
> >
> > Elevation at max gain: 10 degrees 10 degrees
> > Forward gain: 14.36 dBi 14.29 dBi
> > Front/Back: 18.12 dBi 17.35 dBi
> > Front/Side: 18.12 dBi 17.35 dBi
> > Beamwidth: 60 degrees 60 degrees
> >
> > It would be hard to tell the difference between these two antennas. I
> have
> > both installed, but the EF-420 is only at 72' on a tower that doesn't
> have
> > as good terrain as the tower on which the SteppIR is mounted. The
> SteppIR
> > consistently outperforms the EF-420, usually by as much as 5 dB. I
> > attribute
> > that entirely to the difference in height and terrain.
> >
> > I have not done models for 15m and 10m because I don't have data for
> any
> > 4-el antennas for those bands. But I have compared the 4-el SteppIR
> with a
> > Force-12 515 (5-el on 15m, 24' boom) and a Force-12 616 (6-el on 10m,
> 24'
> > boom.) The gain figures are nearly identical, but the F/B on the
> SteppIRs
> > is
> > lower, especially on 10m (a well-known characteristic of the SteppIR
> > design,
> > resulting from inability to place the elements optimally on all three
> > bands.) The gain being comparable suggests that optimized 4-el
> monobanders
> > for 15m and 10m would outperform the SteppIR. But I don't know by how
> > much.
> >
> > 73, Dick WC1M
> >
> >> -----Original Message-----
> >> From: Bob Maser [mailto:bmaser@tampabay.rr.com]
> >> Sent: Friday, June 29, 2007 12:00 PM
> >> To: Joe Subich, W4TV; 'Carl Smidt'; towertalk@contesting.com;
> >> SteppIR@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@subich.com>
> >> To: "'Bob Maser'" <bmaser@tampabay.rr.com>; "'Carl Smidt'"
> >> <xveoneov@primus.ca>; <towertalk@contesting.com>;
> >> <SteppIR@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
> >> >
> >> >
> >> >
> >> >
> >> >
> >> >> -----Original Message-----
> >> >> From: towertalk-bounces@contesting.com
> >> >> [mailto:towertalk-bounces@contesting.com] On Behalf Of Bob Maser
> >> >> Sent: Friday, June 29, 2007 8:50 AM
> >> >> To: Carl Smidt; Richard J. Fiero II W5TFW;
> >> >> towertalk@contesting.com; SteppIR@yahoogroups.com
> >> >> Subject: Re: [TowerTalk] SteppIR
> >> >>
> >> >>
> >> >> Carl, your bragging doesn't make any sense at all. For any
> >> >> specific band
> >> >> most monoband antennas will stomp a SteppIR, assuming that
> >> >> the boom length
> >> >> is the same or longer than the SteppIR. For band hopping
> >> >> convenience, I
> >> >> would agree with you that the SteppIR antenna is better than
> most
> >> >> tribanders. All of this bickering back and forth has become
> >> >> tedious at
> >> >> best.
> >> >>
> >> >> Bob W6TR
> >>
> >
> >
> > _______________________________________________
> >
> >
> >
> > _______________________________________________
> > TowerTalk mailing list
> > TowerTalk@contesting.com
> > http://lists.contesting.com/mailman/listinfo/towertalk
> >
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