[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [IRCA] DKAZ Antenna
Okay guys help me out here. I always thought the sensitivity of a 'short'
wire antenna was primarily from the sides, so that the wire would need to be
orthogonal to the target signals.
James' 150 feet would seem to be a 'short' antenna on the Medium-Wave band;
I'm assuming his wire is elevated.
So is it accurate to compare reception from the END of this long-wire with a
directional antenna oriented ALONG the wire's azimuth? I know the answer is
yes when the wire antenna approaches 1 wavelength...but I wonder about 150
feet.
...ready to be enlightened...
Cheers!
Mark Durenberger
-----Original Message-----
From: neilkaz
Sent: Tuesday, August 18, 2015 8:41 PM
To: Mailing list for the International Radio Club of America ; 'NRC'
Cc: am@xxxxxxxxxxx
Subject: Re: [IRCA] DKAZ Antenna
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
---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
_______________________________________________
IRCA mailing list
IRCA@xxxxxxxxxxxxxxxx
http://montreal.kotalampi.com/mailman/listinfo/irca
Opinions expressed in messages on this mailing list are those of the
original contributors and do not necessarily reflect the opinion of the
IRCA, its editors, publishing staff, or officers
For more information: http://www.ircaonline.org
To Post a message: irca@xxxxxxxxxxxxxxxx
_______________________________________________
IRCA mailing list
IRCA@xxxxxxxxxxxxxxxx
http://montreal.kotalampi.com/mailman/listinfo/irca
Opinions expressed in messages on this mailing list are those of the
original contributors and do not necessarily reflect the opinion of the
IRCA, its editors, publishing staff, or officers
For more information: http://www.ircaonline.org
To Post a message: irca@xxxxxxxxxxxxxxxx
_______________________________________________
IRCA mailing list
IRCA@xxxxxxxxxxxxxxxx
http://montreal.kotalampi.com/mailman/listinfo/irca
Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers
For more information: http://www.ircaonline.org
To Post a message: irca@xxxxxxxxxxxxxxxx