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Re: [IRCA] KAZ versus Pennant/Flag

Nick:


That's what EZNEC says via AutoEZ.


Chuck

________________________________
From: IRCA <irca-bounces@xxxxxxxxxxxxxxxx> on behalf of Nick Hall-Patch <nhp@xxxxxxxx>
Sent: Tuesday, October 23, 2018 7:48 PM
To: Mailing list for the International Radio Club of America
Subject: Re: [IRCA] KAZ versus Pennant/Flag

Thanks for doing that Chuck.  One interesting number is 42dB F/B at
0.5MHz for 120'.  Is that correct?

But the problem seems to go beyond low signal level on the lower band
with smaller DKaz.  Beyond that one data point I mention, it also
seems that the larger DKaz provides significantly better F/B on the
low band, as it also weakens the F/B on the upper band.

Looks like two DKaz' are in order for the next DXpedition, a big one
and a small one...


Nick




At 01:31 2018-10-24, Chuck Hutton wrote:
>Here's a little comparison of DKAZ'es from 100' to 200'.
>
>
>LENGTH  .5 MHZ GAIN     1.5 MHZ GAIN    .5 MHZ F/B      1.5 MHZ F/B
>100     -61.1   -34.6   35.1    47.3
>120     -58     -31.8   42      32.5
>140     -55.4   -29.5   37.4    30.7
>160     -53.2   -27.5   39.4    26.5
>180     -51.2   -26.8   44.8    22.2
>200     -49.5   -24.2   45.2    19.1
>
>
>The formatting is a little messed up when pasting data from Excel.
>
>
>Chuck
>
>
>________________________________
>From: IRCA <irca-bounces@xxxxxxxxxxxxxxxx> on behalf of Don Moman
>VE6JY <ve6jy.1@xxxxxxxxx>
>Sent: Tuesday, October 23, 2018 4:02 PM
>To: International Radio Club of America
>Subject: Re: [IRCA] KAZ versus Pennant/Flag
>
>http://www.durenberger.com/documents/DKAZ070314.pdf   is updated and still
SOME FIELD INFORMATION ON THE DOUBLE DELTA (D KAZ) ANTENNA<http://www.durenberger.com/documents/DKAZ070314.pdf>
www.durenberger.com
The D‐Kaz antenna for MW (and well above) is a Double‐Delta variant, as seen below. The “self‐impedance” of the D‐Kaz is around 1000 ohms at corners “A” and “B.” The null‐pot at 2000 ohms gives good range.



>SOME FIELD INFORMATION ON THE DOUBLE DELTA (D KAZ)
>ANTENNA<http://www.durenberger.com/documents/DKAZ070314.pdf>
>www.durenberger.com<http://www.durenberger.com>
>The D$B!>(BKaz antenna for MW (and well above) is a
>Double$B!>(BDelta variant, as seen below. The
>$B!H(Bself$B!>(Bimpedance$B!I(B of the D$B!>(BKaz is around 1000
>ohms at corners $B!H(BA$B!I(B and $B!H(BB.$B!I(B The null$B!>(Bpot
>at 2000 ohms gives good range.
>
>
>
>shows the 140 foot version.  I don't see anything more recent.... I wish I
>had. Is there a link?  I just built 4 of them last year, one for each major
>direction. I finally have them all hooked up for this season. With the low
>wire they are a great moose catcher!  I could have easily made them higher
>but I was just following the instructions. I could have made them larger as
>I have plenty of room. Now not so easy...
>Don
>VE6JY
>
>
>On Tue, Oct 23, 2018 at 3:36 PM Chuck Hutton <charlesh3@xxxxxxx> wrote:
>
> > As do we all I think. The 140 foot version was abandoned over 5 years ago
> > as it wasn't cutting it at th low end.
> >
> >
> > Chuck
> >
> >
> > ________________________________
> >
> >
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Nick Hall-Patch
Victoria, BC
Canada

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