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Trianglular Solid Antenna

12/03/2014 5:59 PM

I remember seeing an antenna consisting of a solid metal triangle,with a hole drilled

in it used as one point of the lead wire,and a corner used as the other.

I cannot remember the dimensions or exact placement of the hole.

It was seen in an old radio book,probably from the 1950's era,but I cannot find the

book anywhere;it was probably lost during a move.

Anyone else recall seeing anything like this?

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#1

Re: Trianglular Solid Antenna

12/03/2014 6:53 PM

No, but I once operated my CB radio off my patio umbrella. The metal patio table MAY have acted as a ground plane, I don't know. Put a matcher on the lead and screwed it to the bottom of the umbrella mast at the bottom.

The umbrella was open. There may have been beer involved. But, it worked.

Never heard of the get-up you describe.

Maybe these guys?

Antennas - ARRL

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#23
In reply to #1

Re: Trianglular Solid Antenna

12/05/2014 2:10 PM

That goes with the theory; Form follows function and beer.

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#2

Re: Trianglular Solid Antenna

12/03/2014 7:16 PM

There's fractal antenna

http://www.antenna-theory.com/antennas/fractal.php

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#3

Re: Trianglular Solid Antenna

12/03/2014 9:28 PM

Log-periodic antennae use triangular dipole sections. I'm guessing it was either part of a larger, log-periodic antenna or a foreshortened one having less bandwidth. Log-periodic antennae are very broadband, by design. Does this ring a bell?

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#4
In reply to #3

Re: Trianglular Solid Antenna

12/04/2014 12:27 AM

No need to guess, this engineering science, not political science.

http://www.ijest.info/docs/IJEST10-02-11-128.pdf

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#7
In reply to #4

Re: Trianglular Solid Antenna

12/04/2014 9:38 AM

OP said from a 50s radio handbook. Fractal antennas made from self-similar shapes first appeared in 1988. The OP also titled the thread 'Triangular Solid Antenna.'

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#25
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Re: Trianglular Solid Antenna

12/08/2014 12:07 PM

The paper allows for the special case of 0th order fractal, although in the paper, I think they went to the 3rd order. Interesting in any case. I learned something new to me, so that is good.

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#5

Re: Trianglular Solid Antenna

12/04/2014 7:39 AM

It may have been a Fractal antenna experiment. I've experimented with many different antennas made with anything metal! A good tuner (matching device) can get you a long way. I've done roof gutters, wire fences, metal roof edge, etc. I still have several thousand feet of wire strung in the rafters of my barn as a ground plane that is great for verticle antenna experiments! One of the most famous strange antennas is the "light bulb antenna".

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#8
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Re: Triangular Solid Antenna

12/04/2014 9:47 AM

If I hooked one of those "Light bulb antennas" to my hearing aid,would I get some bright ideas?

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#11
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Re: Triangular Solid Antenna

12/04/2014 9:51 AM

as long as you have it plugged in to 120V, and if you stand just right you'd also get good Television reception

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#16
In reply to #11

Re: Triangular Solid Antenna

12/04/2014 11:24 AM

I am already receiving local AM on my loose molar filling,just wondering what I need to

do to get FM?

Tuning is a little tricky,but I have learned to change channels by varying the pressure on

the tooth,for small frequency changes,and a little salt on tongue for the weaker ones.

It is illegal to listen to AM radio at night?

Since my arse is always grounded,will it work for a ground plane?

If I am in China on a merry-go-round, when I get off,will I be disoriented?

Or would I be more likely to have an occident?

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#18
In reply to #16

Re: Triangular Solid Antenna

12/04/2014 11:31 AM

I find that to get FM, if you:

  • face SSW,
  • stand on 1 leg (left)
  • Raise you right arm over your head with a metal coat hanger firmly grasped in your right hand.
  • and your left arm straight outward

FM comes in pretty clearly...... unless there's a lot of sunspot activity.

Then all bets are off.

Good luck,

Over!

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#10
In reply to #5

Re: Trianglular Solid Antenna

12/04/2014 9:51 AM

"I still have several thousand feet of wire strung in the rafters of my barn as a ground plane that is great for verticle antenna experiments!"

A so-called 'counterpoise'. Why is it in the rafters of your barn? Such ground planes are usually close to the ground (or buried in it)

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#14
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Re: Trianglular Solid Antenna

12/04/2014 10:46 AM

The "ground plane" is actually attached to the joists...not the rafters. I used to have a screwdriver antenna in the center. It had a 104" whip which went through the roof.

I had contacts all over the world on 10M to 80M with that set up.

I now use a 540ft horizontal loop strung in the trees behind my house.

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#15
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Re: Trianglular Solid Antenna

12/04/2014 10:50 AM

My elmer, W8AAL, used to talk to his mate in Maine every day at 4PM eastern time. You wouldn't happen to have one of his QSL cards would you? Russ has been a Silent Key for many years now. A prince of a gentleman. I miss 'im.

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#17
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Re: Trianglular Solid Antenna

12/04/2014 11:29 AM

Sorry but I do not have his card. He probably passed before I got my license. Novice in 2004- extra in 2005.

73 - KG1O

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#19
In reply to #10

Re: Trianglular Solid Antenna

12/04/2014 4:47 PM

The best antenna ever is still the neutral wiring in your house. Just be very sure you get the neutral wire, not the hot one. That makes things a bit hot for a short while. I know a certain engineer who when he was about 12 tried this with a radio and a receptacle and picked the wrong side to insert the antenna lead.

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#21
In reply to #5

Re: Trianglular Solid Antenna

12/05/2014 8:02 AM
"

One of the most famous strange antennas is the "light bulb antenna".

In the old days I had used incandescent bulbs temporarily in series with the radio's output. This is done to adjust the transmitter's RF out, for maximum power transfer output, matching the antenna and to maximize radiated power. This is done if regular RF meters are not readily available.. I will pick a bulb with a rated wattage that will match the expected or rated power output of my radio. While keying the transmit button, will adjust and try to peak the xmtr's power output at the same time observing the bulb for maximum glow.

Once the bulb's brightness /glow reaches a level that is comparable to the bulb's rated wattage, it indicates that the transmitter's maximum peak power output is achieved! I will then remove the bulb and connect the antenna directly for actual transmission!

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#6

Re: Trianglular Solid Antenna

12/04/2014 8:36 AM

If it was from the 1950s it would NOT have been a fractal antenna. They've only been around since the late 1980s or '90s.

You might be remembering something like this:

http://www.hamuniverse.com/kl7jreasyvertloop.html

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#9
In reply to #6

Re: Trianglular Solid Antenna

12/04/2014 9:49 AM

You are right.This was long before Mandelbrot and Fractals used for antennae.

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#12
In reply to #9

Re: Trianglular Solid Antenna

12/04/2014 9:52 AM

You said a solid triangular antenna. Pictured is a loop antenna.

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#13
In reply to #9

Re: Trianglular Solid Antenna

12/04/2014 10:05 AM

Mandlebrot was never used for an antenna. He wouldn't sit still long enough.

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#20

Re: Trianglular Solid Antenna

12/05/2014 3:52 AM

This is a heck of a URL but it shows the "Corner Reflector Antenna"

https://www.google.com.au/search?q=corner+reflector+antenna&espv=2&biw=1680&bih=949&tbm=isch&imgil=QLC_ZJrwAu9myM%253A%253BjmuvT6DQ_Bl87M%253Bhttp%25253A%25252F%25252Fwww.hamtv.com%25252Foal.html&source=iu&pf=m&fir=QLC_ZJrwAu9myM%253A%252CjmuvT6DQ_Bl87M%252C_&usg=__PHCYFVmCJZNwH66WP-kbuoa0UCE%3D&ved=0CD0Qyjc&ei=InGBVLf7B47k8AWazoL4AQ#facrc=_&imgdii=_&imgrc=QLC_ZJrwAu9myM%253A%3BjmuvT6DQ_Bl87M%3Bhttp%253A%252F%252Fwww.hamtv.com%252Fgiffiles%252FTCR23.jpg%3Bhttp%253A%252F%252Fwww.hamtv.com%252Foal.html%3B432%3B504

Better to do a google search using corner reflector.

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#22

Re: Trianglular Solid Antenna

12/05/2014 8:16 AM

There was one in the 1960s for CBs in a magazine that consisted of a piece of plastic shaped like two bat wings. The coax connected to the center with a 50 ohm resistor across it. A guy in my class actually built one. It was the april edition - yes it was an april fools joke.

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#24

Re: Trianglular Solid Antenna

12/05/2014 4:53 PM

Was it on Buck Rogers space ship?

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