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Articles (18 articles)

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A dipole antenna normally is cut for approximately one half of a wavelength. The customary formula is (468 / F) feet or (142.65 / F) meters where F is the frequency in MHz. This works out to about 0.48 wavelength. The dipole antenna has seen little use...

Published on 10/24/2011, 4:30 PM by KD8BIG | 2 comment(s)

Tags: antenna

How to fine-tune your homebrew loop antenna

How to fine-tune your homebrew loop antenna Is the null in the direction better if the antenna is bigger? Not necessarily.Null and sensitivity are generally better in larger loops, but the nulls are principally determined...

Published on 10/5/2011, 6:08 AM by KD8BIG | 1 comment(s)

Tags: Antenna

Kiwa vs. Quantum

Kiwa vs. QuantumThe loop experiments at East Harwich did produce some interesting results. Mainly I was looking at both absolute weak signal audibility (signal to amp. noise ratio) and raw S-meter readings. The former is of prime concern with a good...

Published on 10/3/2011, 8:26 PM by KD8BIG | 1 comment(s)

Tags: Antenna

Inductively Coupled Loop Antenna

Thanks to Pete for this e-mail This inductively coupled booster requires no power, and has no amplifier to introduce noise of its own. It is easy to construct from common material. This article will assume the use of an 11" x 14"...

Published on 9/30/2011, 1:42 PM by KD8BIG | 1 comment(s)

Tags: antenna

Sorry Mr. Hertz, Sorry Mr. McCoy too

Sorry Mr Hertz - Sorry Mr. McCoy too...!!!This is a diagram of my "Poor Mr. Hertz", a new development of my previous "Dont cry for me Mr. Hertz" dipole antenna. I use it as multiband dipole for 3,5 - 7 - 10 - 17 and 12 meter band.I am devoted of my ARRL Antennas Guru Lew McCoy...

Published on 9/29/2011, 6:45 PM by LU1DZ | 0 comment(s)

Tags: antenna g5rv hertz lu1dz cw morse

Attic Loop

This was e-mailed to me the other day. Great Info~ Lacking outdoor space for that antenna?Here's what one can do:Put as much wire in your attic as you can run in the shape of a loop. Establish the feedpoint as high as possible. Use heavy gauge wire to...

Published on 9/28/2011, 11:44 AM by KD8BIG | 3 comment(s)

Tags: Antenna

Stranded Copper Wire

I have tried fence wire, and it does work AOK, but in this climate (NE MO) it seems to break a lot more than the 18Ga stranded electric wire that I settled on (inspection of broken ends indicates metal fatigue). The small Ga. soft copper does stretch,...

Published on 9/17/2011, 1:01 PM by KD8BIG | 1 comment(s)

Tags: Antenna

Wooden Fence Antenna

You have a wooden fence. Good. One suggestion: Get a good antenna tuner (if you don't have one) and learn how to use it. 2. Get some insulated wire (house wire will work) and an eight-foot ground rod. 3. Put the ground rod in near...

Published on 9/17/2011, 12:58 PM by KD8BIG | 0 comment(s)

Tags: Antenna

The Carpet Loop

The Carpet Loop -- A High Performance Indoor SW Antenna IntroductionThere are many shortwave listeners who can't, because of location, infirmity or a unyielding landlord, put up an outside antenna. Such people are given two...

Published on 9/15/2011, 11:39 AM by KD8BIG | 0 comment(s)

Tags: Antenna

The Bird Feeder Antenna

The Bird Feeder AntennaShortwave antennas are large and trying to hide one can be like trying to hide an elephant. Many listeners try different configurations, snap together antennas, wires, and flag poles to conceal their...

Published on 9/14/2011, 11:29 AM by KD8BIG | 2 comment(s)

Tags: Antenna

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