Re: Topband: 160M 8 Circle Array for transmit

On 3/4/2016 1:51 PM, Dan Maguire via Topband wrote: There are some fairly detailed 8-circle modeling studies in the last section on this page: http://ac6la.com/aecollection6.html Lots of illustrations and several url links for more info. Dan, AC6LA http://ac6la.com _ Topband

Re: Topband: 160M 8 Circle Array for transmit

Rick Karlquist wrote: >>> Models well on EZNEC. There are some fairly detailed 8-circle modeling studies in the last section on this page: http://ac6la.com/aecollection6.html Lots of illustrations and several url links for more info. Dan, AC6LA http://ac6la.com _ Topband

Re: Topband: 160M 8 Circle Array for transmit

On Fri,3/4/2016 9:38 AM, Ray Higgins (W2RE) wrote: Im looking for both spacing and phasing for 80M and 160M 8 Circle array for a QTH in Maine. I cant seem to find much information by searching online. Can someone point me in the right direction. Hi Ray, There are several ways to get

Re: Topband: 160M 8 Circle Array for transmit

On 3/4/2016 10:46 AM, Ray Higgins (W2RE) wrote: Let me clarify, Im looking for 160M and 80M TRANSMIT 8 circle array not RX array. Ray Higgins W2RE.com You asked about spacing and phasing. There is absolutely no reason why you can't also use the same spacing and phasing (as my receive

Re: Topband: Comments on High Performance RX Antennas for a Small Lot (Webinar)

It seems as though if data were taken as to categorize the (average or typical) noise temperature with the angle of intensity of atmospheric noise that this could be utilized as part of the RDF equation. For instance, if at 20 degrees, the noise temperature was 5 dB higher than at 80 degrees, then

Re: Topband: WEB address correction: : RDF in the real-world

"K1FZ-Bruce" wrote: > IV3PRK at HC1PF with the help of friends proved with extensive research and > modeling, > that a BOG antenna is a tuned circuit not a traveling wave antenna. BOG is a traveling wave (Beverage) antenna at its best. If some "tunning" artefacts were

Re: Topband: WEB address correction: : RDF in the real-world

This statement is to say that, if the earth is used instead of radials, the longer/ or a number of rods is  better than one very short rod. On Fri, 04 Mar 2016 19:28:46 +0100, shristov wrote: donov...@starpower.net wrote: The correct URL is: www.qsl.net/k1fz/bogantennanotes.html

Re: Topband: 160M 8 Circle Array for transmit

Let me clarify, Im looking for 160M and 80M TRANSMIT 8 circle array not RX array. Thanks, Ray Higgins W2RE.com _ Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: 160M 8 Circle Array for transmit

On 3/4/2016 9:38 AM, Ray Higgins (W2RE) wrote: Im looking for both spacing and phasing for 80M and 160M 8 Circle array for a QTH in Maine. I cant seem to find much information by searching online. Can someone point me in the right direction. Ray Higgins W2RE.com I am currently building a

Re: Topband: WEB address correction: : RDF in the real-world

donov...@starpower.net wrote: > The correct URL is: > www.qsl.net/k1fz/bogantennanotes.html >From that page: Because the BOG is "trying" to develop signal voltage between the wire and the earth it sits upon This is misleading at best. The voltage results from the current flowing in the

Topband: Fwd: RE: : RDF in the real-world

  Hi JC,   I am trying to give you that information.   It is in IV3PRK's research.  At the bottom of the page, please read both his  research link, and his modeling link.   www.qsl.net/k1fz/bogantennanotes.html   73 Bruce-k1fz         On Fri, 4 Mar 2016 13:13:40 -0500, JC wrote: >that a

Re: Topband: : RDF in the real-world

>that a BOG antenna is a tuned circuit not a traveling wave antenna. < Hi Bruce, I am missing something here, can you elaborate on that statement? 73 JC N4IS _ Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: Comments on High Performance RX Antennas for a Small Lot (Webinar)

Hi Frank I agree with you. I'm near Fort Lauderdale in a city lot, directivity from my Vertical WF did help me a lot on 160, some rare DX like 4W6 was possible only direct and using the vertical WF. 9M0 first time was also direct using the VWF but next year 9M4 was only possible to work using

Re: Topband: WEB address correction: : RDF in the real-world

The correct URL is: www.qsl.net/k1fz/bogantennanotes.html - Original Message - From: "K1FZ-Bruce" To: "Topband" Sent: Friday, March 4, 2016 5:54:09 PM Subject: Topband: WEB address correction: : RDF in the real-world IV3PRK at

Re: Topband: RDF in the real-world

Hello JC and others, I must take a little issue on being able to measure the vertical arrays. While it may be true that it is hard to measure, you can indeed see the pattern quite well by looking at different stations and switching around the compass. It does not take long before you can

Topband: : RDF in the real-world

IV3PRK at HC1PF with the help of friends  proved with extensive research and modeling,  that a BOG antenna is a tuned circuit not a traveling wave antenna.   Please see the IV3PRK   research and modeling links at the bottom of my BOG antenna page   www.bogantennanotes.html   73 Bruce-k1fz    

Topband: WEB address correction: : RDF in the real-world

IV3PRK at HC1PF with the help of friends  proved with extensive research and modeling,  that a BOG antenna is a tuned circuit not a traveling wave antenna.   Please see the IV3PRK   research and modeling links at the bottom of my BOG antenna page   www.bogantennanotes.html  

Re: Topband: RDF in the real-world

Hi Carl Yes, the concept is assuming equal density noise spread uniform. However there air point everybody wants to hide. Vertical polarized antennas based on phasing elements does change directivity and does have interaction with others vertical elements. It is hard to measure it because you

Re: Topband: BCB High Pass Filter

Hi Roger, Pretty easy to build your own hi pass RX filter, and here is a link to a simple website I created that documents one of my builds which might give you some ideas (I use a dremel tool to quickly create the circuit board). http://sites.google.com/site/lwmwbandrejectfilter/ 73, Don

Topband: RDF in the real-world

I agree. There are times, especially in disturbed condx, when my BOG antennas are "head and shoulders" better than my other antennas.   73 Bruce-K1FZ www.qsl.net/k1fz/bogantennanotes.html       I can't vouch for JC's numbers (his numbers may be QTH specific), but the concept is

Re: Topband: Comments on High Performance RX Antennas for a Small Lot (Webinar)

The RDF seems to be the best we have at the moment, for taking a 3-dimensional pattern and turning it into a single number. Of course the details of the 3-dimensional pattern are lost. In addition to the quantitative RDF or S/N numbers, the qualitative change in pattern as you move up the RDF is

Topband: RDF in the real-world

Rick N6RK said: > In this webinar, it was asserted (without explanation) that > for every 1 dB increase in RDF, you get 1.5 to 2.0 dB > improvement in S/N ratio. I've never heard that before > and don't even see how it makes sense. Actually, I don't > even know how you can make generalizations

Re: Topband: Comments on High Performance RX Antennas for a Small Lot (Webinar)

Hi Rick As I told in the webinar it is a measured practical result, not a math calculation.. I have a DDC SRD and several receiving antennas in a very clean environment, only one TX antenna detuned, not other tower or Yagi etc. I can switch from one receiving antenna to another and see how

Re: Topband: Am I the only one in step?

Don, The use of that spectrum by others has reduced very significantly. I cannot say that there are no other users, but it's not like it used to be when the current spectrum allocations were originally agreed. That is the reason that IARU raised the matter as a potential agenda item for WRC 19.