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Author Topic: An antenna that's not very good  (Read 954 times)

VK3YE

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An antenna that's not very good
« on: August 31, 2021, 02:32:38 PM »

If you have to conceal an antenna on a fence, here's an example of an antenna that's not very good.

It's a loop / folded dipole type thing fed right at the bottom.

Its average height is low and in a noisy urban environment you won't hear much on it.

You are perhaps better just using a half wavelength dipole fed as high as you can (even if it's just the top of the fence).

Anyway here's the video.

https://www.youtube.com/watch?v=tuLkBkh6hJQ



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Peter VK3YE/AK3YE    Youtube videos at VK3YE

Author of 'Minimum QRP', 'Hand-carried QRP Antennas', 'Ham Radio Get Started' and other popular books on ham radio.
All available in paperback or $US 5 ebook. Learn more at vk3ye.com or 'VK3YE Radio Books' on Facebook.

K0UA

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Re: An antenna that's not very good
« Reply #1 on: August 31, 2021, 03:43:54 PM »

Looking forward to the doublet and tuner set up to see if it does any better. Might have less ground losses with it up just a bit higher, but I wonder about that noise... Not good.
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73  James K0UA

N8FVJ

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Re: An antenna that's not very good
« Reply #2 on: September 01, 2021, 04:12:53 AM »

In a HOA, flag pole antenna is a better bet. Make sure permit meets antenna height. Most HOA allow a flag pole.
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AA5TB

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Re: An antenna that's not very good
« Reply #3 on: September 05, 2021, 07:00:07 PM »

Hi Peter,

You may want to try the same antenna but fed in the center of one of the vertical sides. This will give vertical polarization and may not "short out" to the ground as much as the version fed at the center of the bottom horizontal section. I've been wanting to try this myself but haven't yet. I have modeled it with descent results but the "proof is in the pudding".

73,
Steve - AA5TB
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KG4RUL

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Re: An antenna that's not very good
« Reply #4 on: September 06, 2021, 06:15:06 AM »

In a HOA, flag pole antenna is a better bet. Make sure permit meets antenna height. Most HOA allow a flag pole.

Unfortunately, simply allowing flagpoles may not let you slip an antenna in.  Along with specifying the maximum height, some HOAs specify which brand of flagpole can be installed.  Some require the flag to be illuminated at night or taken down.  Others require a submitted plan and an inspection afterwards.  Kind of hard to explain what the wires coming out of the ground are for.
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W1VT

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Re: An antenna that's not very good
« Reply #5 on: September 06, 2021, 06:32:09 AM »

An illuminated flag pole needs a source of power that can also be used to power an auto tuner!

Zak W1VT
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K1VSK

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Re: An antenna that's not very good
« Reply #6 on: September 06, 2021, 10:39:06 AM »

An illuminated flag pole needs a source of power that can also be used to power an auto tuner!

Zak W1VT
Most of the folks around here who have flagpoles use solar lights
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