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Author Topic: please help me find a web page on antennas  (Read 1385 times)
AK4YA
Member

Posts: 106




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« on: August 11, 2012, 08:47:49 PM »

I meant to notate its web address, but didnt.  I had it pulled up just 2 days ago.  It spoke about a half wave dipole at 160m and its performance on other bands.  It also gave both az and el radiation patterns for each case.  arrgh!

thanks for any help
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W9GB
Member

Posts: 2616




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« Reply #1 on: August 11, 2012, 08:55:35 PM »

Most web browsers have a history function (tracks where you have been),
 unless you deliberately config. to wipe your history.

Check (or learn) your personal web browser.
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K3ANG
Member

Posts: 177




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« Reply #2 on: August 12, 2012, 06:40:38 AM »

This one??

160 METER DIPOLE USE ON MULTIPLE BANDS?
http://www.arrl.org/forum/topics/view/134
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AK4YA
Member

Posts: 106




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« Reply #3 on: August 12, 2012, 10:54:16 AM »

This one??

160 METER DIPOLE USE ON MULTIPLE BANDS?
http://www.arrl.org/forum/topics/view/134


thats not it.  the page had lots of radiation pattern pictures for different scenarios.  I looked in my history.  for some reason firefox isnt saving anything past 10 or so links. and they are getting overwritten
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AE5JU
Member

Posts: 227




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« Reply #4 on: August 12, 2012, 11:57:56 AM »





http://www.hamuniverse.com/antennas.html  And just keep scrolling down.

http://www.hamuniverse.com/n4jaantennabook.pdf   Right click and "Save As" to your computer.

http://www.ac6v.com/antprojects.htm

http://www.qsl.net/w4sat/antenna.htm

http://www.mds975.co.uk/Content/amateur_radio_antennas.html

http://www.donkeith.com/n4kc/article.php?p=22

http://www.eham.net/articles/21292

This should keep you busy a while... hahaha....

73,
Paul - AE5JU
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AA4HA
Member

Posts: 1386




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« Reply #5 on: August 12, 2012, 12:14:21 PM »

I have had that same frustrating experience. Finding something in the middle of the night and forgetting to bookmark it.
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Ms. Tisha Hayes, AA4HA
Lookout Mountain, Alabama
WB6BYU
Member

Posts: 13147




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« Reply #6 on: August 12, 2012, 05:21:38 PM »

Was it something like this:  http://www.cebik.com/content/gup/gup5.html

The late W4RNL has a lot of articles with antenna pattern plots, etc.  If that article isn't the
right one, but the writing style is similar, then it may be worthwhile browsing around on
his web site to see if you can find the specific one you are looking for.

(You need to register for free to access the web site, but I think it is well worth it for
the wealth of information there.)
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AK4YA
Member

Posts: 106




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« Reply #7 on: August 12, 2012, 08:00:50 PM »

I have had that same frustrating experience. Finding something in the middle of the night and forgetting to bookmark it.

no doubt.  extremely agitating.  but i finally found it.  on chance also.  I looked through all the links in this thread that seemed possibilities, did probably 100 different google searches using keywords that I thought I remembered was in there and pouring through many pages of links,  nothing.

like I said, my computer admin has firefox only remembering history for just the last 15 (at first I guessed the list was 10 elements long) but I was able to find it by typing in "doublet" in the firefox address bar and the address bar's history popped up and it was one of the first few

http://belajar.internetsehat.org/pustaka/library-sw-hw/amateur-radio/ant/docs/Introducing%20the%20All-Band%20Doublet.htm

so I take my general test tomorrow.  got an elmer lined up to answer lots of ? I have.  Moving to a home next month that will support a longwire and am looking for something multiband that uses coax and can tune to 3:1 on a late model 100w transceiver that Ive yet to get.  Antenna first.

thanks all 73
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KB2WIG
Member

Posts: 115




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« Reply #8 on: August 12, 2012, 08:15:33 PM »

"  so I take my general test tomorrow.  got an elmer lined up to answer lots of ? "

Relax and good luck.

kill tha wabbit

klc
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N4CR
Member

Posts: 1662




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« Reply #9 on: August 12, 2012, 08:56:49 PM »

I can't get that page to load, but an all band doublet will no doubt be ladder line fed, not coax. If you want a coax fed antenna, it will have to be resonant on the bands you want to work or it will not have less than 3:1 swr.

Either a ladder line doublet with a balanced line tuner or a coax fed dipole with fan dipole arrangement or something like the Alpha Delta DXEE which is a trapped dipole.

Regarding height, take a look at this: http://www.qsl.net/aa3rl/ant2.html

What this is saying is that you need to get your antenna up in the air for a dipole of any design to do more than warm the clouds. There is no DX in the clouds.

This is why so many people who cannot get an antenna way up in the air depend on a vertical for DX operations. A good vertical will have a very low angle of radiation and is very good for basic DX work.
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73 de N4CR, Phil

We are Coulomb of Borg. Resistance is futile. Voltage, on the other hand, has potential.
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