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Re: [IRCA] [NRC-AM] DKAZ Antenna

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One good sanity check would be to do up a quick and simple SuperLoop.  Align it similarly to the DKAZ and put it far enough away so as not to interact.

http://www.bamlog.com/superloop.htm
http://www.bamlog.com/vartermloop.htm

Since this would be mostly for pest-null evaluation testing / temporary use, dimensions of this can be on the small side, e.g. 20 ft. across by 10 ft. up and down.

I have done some "termination determination" by adjusting a pot right at an antenna's null side.  This is accomplished by using wireless headphones so that pest-station audio from the receiving position gets transmitted out to the "field."

The headset I have just about makes the required 150-200 ft. distance here.

James, do you have a phasing unit?  For single frequency at a time DXing, as opposed to spectrum recording, the Quantum Phaser does a good job.

http://www.dxtools.com/Phaser.htm

DKAZ signal can be presented to one phaser input, longwire to the other.  Or put a 16:1 transformer at each end of the DKAZ and bring two coaxial lines to the phaser instead of using a termination on one end.

Mark Connelly, WA1ION
South Yarmouth, MA

-----Original Message-----
From: jniven <jniven@xxxxxxxxxxxxx>
To: neilkaz <neilkaz@xxxxxxxxxxxxx>; Mailing list for the International Radio Club of America <irca@xxxxxxxxxxxxxxxx>
Cc: am <am@xxxxxxxxxxx>
Sent: Wed, Aug 19, 2015 11:29 am
Subject: Re: [NRC-AM] [IRCA] DKAZ Antenna

Hi Neil,

Thanks from a happy DKAZ user. The antenna took 3 weekends to build,
due to the Texas heat, clearing a path through the trees and gathering all the
supplies. I decided to make this a permanent installation, using 4"x4" timber
posts for the main supports and 2" electrical PVC pipe for the 22' supports, all
seemed to work just fine.
As for the termination, I will try a 5k pot and see
if I can get a better null to the north. The Dallas station come in pretty good
here, 570 KLIF, 820 WBAP, these would be the stations I would like to null.
Also, at present I am using coax direct onto the feed end of the antenna, so I
have not added the matching transformer as yet, next step.

As for San Angelo
stations, I have only logged KGKL 960 but nothing else at present.
I really
don't have enough width on my land for a side by side DKAZ, sounds like a great
idea though.
I am presently working on my Spanish, I know some which helps with
station identifications, but more is helpful.

Thanks
James
 
----
neilkaz <neilkaz@xxxxxxxxxxxxx> wrote: 
> This is good to hear about another
happy DKAZ user. You may find that you are an even more happy DKAZ user if you
spend the effort to manually fine tune Rt to see if you can get even better back
nulls. This is best done in the daytime. I'd guess you might improve back nulls
by a few dB unless 900 ohms is perfect. I do realize that you probably don't
have much daytime stuff from 300 deg into Austin. Does San Angelo come in?
>

> Do you have land to array two of these side by side for a more narrow
beamwidth? 
> 
> If not fluent in Spanish aimed at 120 from Austin, I expect
you'll want to improve your command of that language.  73 KAZ
> 
>
-----Original Message-----
> >From: James Niven <jniven@xxxxxxxxxxxxx>
>
>Sent: Aug 18, 2015 8:11 PM
> >To: 'NRC' <am@xxxxxxxxxxx>
> >Cc: 'Mailing list
for the International Radio Club of America' <irca@xxxxxxxxxxxxxxxx>
>
>Subject: [IRCA] DKAZ Antenna
> >
> >Hi All,
> >
> > 
> >
> >Just wanted
to report I have completed my DKAZ antenna over the past weekend
> >and I have
had a chance to test it out the past few nights.
> >
> >I followed the design
as Mark Durenberger's article
>
>http://www.durenberger.com/documents/DKAZREPORT051214.pdf I built the 140
>
>foot long with 22 feet high supports. I am at present using a 900 ohm fixed
>
>1 watt resistor and the direction is 120 degree.
> >
> > 
> >
> >I have
been comparing the DKAZ to my present 150 foot longwire running
> >pretty much
in the same direction, so far, the performance of the DKAZ has
> >been very
encouraging. Signals are appearing a lot stronger and earlier in
> >the evening
than the Longwire and I can tell signals from the north are
> >reduced, while
signals from the South are a lot stronger and louder.
> >
> > 
> >
> >On a
couple of frequencies I have checked, on the DKAZ there is a station
> >with a
decent signal while the Longwire has no station at all or a different
>
>station.
> >
> >I am still to hear a new station with this antenna but it
will happen.
> >
> > 
> >
> >Thanks for the fine article Mark and answering
my questions.
> >
> > 
> >
> >James Niven
> >
> >Austin, Texas

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