> 4. Perhaps an option to include more elements so that the spacing
> between elements could be varied by choosing among them for
> the higher frequencies.
The MonstIR and DB-36 already use this approach ... they have three
active elements on 40/30 with a shorter fourth element added as a
first director or 20-10 meters.
An experimenter could easily extend the boom of a MonstIR/DB-36 to
create a longer antenna for 20 Meters using the existing 40/30M
reflector and then add a "standard" element at a location more
suited to maintaining good F/R through 10 meters.
The existing 4 element 20-6 meter design could potentially be
extended to a 36 foot boom with a standard element used as a
20 - 15 meter reflector and a shorter tunable reflector added
for 12/10/6 meters.
Some of these designs are possible with the new controller
as it supposedly contains a more capable microprocessor and
larger EEPROM for element data. The limitation will be the
maximum number of supported element drivers.
73,
... Joe, W4TV
> -----Original Message-----
> From: towertalk-bounces@contesting.com
> [mailto:towertalk-bounces@contesting.com] On Behalf Of Al Williams
> Sent: Tuesday, November 04, 2008 3:38 PM
> To: towertalk
> Subject: Re: [TowerTalk] Steppir antennas
>
>
> Readers interested in the merits of Steppir antennas may be
> interested in
> the
> following observations and predictions:
>
> 1. Yagi type antennas (fixed element length) have been used
> for many years
> with variations benefitting from different
> manufacturers and users
> experience. Except for the newlly announced Steppir DB36 and a
> controller the original design and hardware has not changed.
>
> 2. I expect that we will see a beefed up tape, better
> fitting element
> tubing,
> stronger ehu's, and protection for the drive circuit
> which will reduce
> failures. And in addition will allow a 2 element 80
> Steppir to also
> be
> reliable.
>
> 3. I don't know what improvement the new controller provides but I
> expect to see a far more versatile one.
>
> 4. Perhaps an option to include more elements so that the spacing
> between elements could be varied by choosing among them for
> the higher frequencies.
>
> These will not replace the big boy's multi=tower, stacked,
> long boom monobanders but would appeal to the rest of us.
>
> k7puc
>
>
> ----- Original Message -----
> From: "Rudy Severns" <@contesting.com>
> Sent: Tuesday, November 04, 2008 9:50 AM
> Subject: [TowerTalk] Steppir antennas
>
>
> > I'd like to pass on my experience with several SteppIR
> antennas. Some
> > years
> > ago I won one of the original SteppIR dipoles at the NW DX
> convention.
> > After using it for a while I moved on to one of the early
> three element
> > 20m+
> > arrays and a couple of years ago to the monster SteppIR with three
> > elements
> > on 40m and 30m and 4 elements on 20m+.
> >
> > My initial reaction to the dipole was "this Rube Goldberg can't
> > possibly work!" The monster SteppIR is an order of magnitude more
> > complicated that the original SteppIR's and is certainly
> not for the
> > mechanically challenged when it comes to assembly. My opinion has
> > still not changed, these antennas
> > cannot possibly work.
> >
> > However, time and experience have cast some doubt on that opinion.
> > After several years and several antennas, I have yet to have a
> > failure. These contraptions have worked flawlessly for
> me. My QTH
> > is a high wind environment being on a hilltop in western
> Oregon but I
> > rarely have much ice loading.
> >
> > I'm not suggesting anyone buy one of these but since I saw
> a good of
> > conversation on the reflector about these antennas and
> thought I would
> > add my experience for anyone interested.
> >
> > 73, Rudy N6LF
> >
> > _______________________________________________
> >
> >
> >
> > _______________________________________________
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> > TowerTalk@contesting.com
> > http://lists.contesting.com/mailman/listinfo/towertalk
> >
> >
> > --
> > No virus found in this incoming message.
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> Date: 11/4/2008
> > 8:26 AM
> >
> >
>
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