Re: [IRCA] DKAZ Antenna

[<jniven@xxxxxxxxxxxxx>]

Mark,

Yes, the longwire is elevated about 15 feet. When I moved into onto my 1 acre about 2007, this was the longest wire run I could get and it has stayed as an all rounded even today.

Thanks

---- Mark Durenberger <Mark4@xxxxxxxxxxxxxxx> wrote: 
> 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
> >
> >
> >
> >
> >
> >---
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