I use a delta loop on 40m feed at one of the corners with a 75ohm
matching stub. I'm sure it's not optimal but the thing works! Compared
to a resonant dipole the delta loops wins hands down in my book.
73 Matt
W5LL
On Wed, 2008-06-25 at 07:07 -0400, Bob Maser wrote:
> Actually, the delta loop is fed at one of the lowers by many because of
> convenience. When fed at that location, it is more of a oblique radiation
> polarization pattern rather than the preferred vertical polarization. The
> best way is 1/4 wavelength down from the apex and the characteristic
> impedance at that point is ± 110 ohms, which is far from the 600 ohms
> recommended by another contributor to this reflector.
> IMHO and actual usage, for 75 I still like the four square head and
> shoulders above even a pair of Delta loops with their apex's at 100 feet,
> based on my experperience.
>
> Bob W6TR
>
> ----- Original Message -----
> From: "Bob" <rgshauger@myyellowstone.net>
> To: "N7mal" <n7mal@citlink.net>; "Richards" <jruing@ameritech.net>;
> <towertalk@contesting.com>
> Sent: Wednesday, June 25, 2008 2:38 AM
> Subject: Re: [TowerTalk] Delta Loop compared to Dipole (actual experience)
>
>
> >A 80 meter full wave delta loop tilted at 45 degrees fed at the bottom
> > corner works exceedingly well for early morning dx when compared to an
> > inverted vee at the same height. Bob W7KD
> >
> >
> > ----- Original Message -----
> > From: "N7mal" <n7mal@citlink.net>
> > To: "Richards" <jruing@ameritech.net>; <towertalk@contesting.com>
> > Sent: Tuesday, June 24, 2008 9:26 PM
> > Subject: Re: [TowerTalk] Delta Loop compared to Dipole (actual experience)
> >
> >
> >> My lot is slightly smaller than yours is. I have a full sized 80 meter
> >> loop,
> >> 85 feet on a side. It is fed at the top with open wire 'real' 600 ohm
> >> line
> >> into the tuner in the shack. It is fed at the top so it is vertically
> >> polarized. It is also open at the center of the bottom. It works very
> >> well
> >> on 160/80/40.
> >> 73
> >>
> >>
> >> MAL
> >> N7MAL
> >> BULLHEAD CITY, AZ
> >> http://www.n7mal.com
> >> Everyone in the world is
> >> entitled to be burdened
> >> by my opinion
> >>
> >>
> >> ----- Original Message -----
> >> From: Richards
> >> To: w1rh@yahoo.com
> >> Cc: towertalk@contesting.com
> >> Sent: Wednesday, June 25, 2008 2:42
> >> Subject: Re: [TowerTalk] Delta Loop compared to Dipole (actual
> >> experience)
> >>
> >>
> >> Do you think one could put a decent loop on a suburban lot
> >> that is only 100 feet by 60 feet? How big a loop and how high
> >> do you suppose it might have to be? I figure I could put something
> >> up that is a total of, say, 250 feet around. I thought that might just
> >> get me on 80 meters, and I could use a tuner for some higher bands.
> >> Using a 40 foot metal mast, I might be able to get it up that high at
> >> a reasonable effort and expense.
> >>
> >> Do-able? Worth doing if so?
> >>
> >> Whaddaya say? /// JHR - K8JHR ///
> >>
> >> ====================================================
> >>
> >>
> >> Robert Hess wrote:
> >>>
> >>> I have had terrific luck with loops over dipoles.
> >>
> >> -----------------------------------------------------------------------------------------------
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> >>
> >>
> >>
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> >> 7:53 AM
> >> _______________________________________________
> >>
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> >
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