If it is in red, it is my comment, if it is in black it is a comment from the web page.

 

 

ANTENNAS

 

Ribbon Dipole This is a folded dipole that is very easy to make. I have made one for 30 meters. It is made entirely out of 300 � TV antenna lead and a capacitor. It is resonant and the cap puts it at 50� so it can be used without a tuner. I could not find the proper capacitor so I have 3 capacitors in series and it works well. My first test was with QRP 2.5 watts and I received a 569 signal from WV to CT. I intend to build another for 20 meters.

calculate antenna length Design Your Own Dipoles And Inverted Vees - Most people are familar with the center fed, half wave dipoles and inverted vees that are so very popular. But did you know that there really is no exact formula for computing the length of these antennas? The problem is that there are several factors that affect the resonant frequency of any antenna (including these two types.) Some of these factors are:the height above ground, the diameter of the wire, nearby structures, the affects of other antennas in the area and even the conductivity of the soil. There is a built in calculator for antennas on this web page, it is very easy to use.

 

Notebook - Antenna Trim Chart Use this chart as an aid in trimming the length of your antenna. It gives you an idea of the change in wire length needed to move antenna resonance a specific number of KHz.This web page is very useful for making those fine adjustments to an antenna.

 Instructions on building antennas THIS PACKAGE IS A USEFUL ANTENNA ANALYSIS PROGRAM FOR THE RADIO AMATEUR, PROFESSIONAL, TECHNICIAN AND STUDENT INTERESTED IN ANTENNA DESIGN.

 

Here you will find information about wire antennas as well as directional beams. THE ANTENNA ELMER - Here you will find information about wire antennas as well as directional beams.

 

Beam Lengths VHF / UHF Direct Connect Beams - Here are some lengths and spacings for various direct connect beams. The layouts are straight forward and are illustrated below. Your SWR should be less than 1.3:1 with these designs.

 

Ham Homebrew Antenna Page AC6V's HOMEBREW ANTENNAS - LINKS BOOKS AND PUBS FOR ANTENNA BUILDERS SOME OF MY FAVORITE ANTENNA BOOKS -- AC6V

 

Small Loop Antennas - AA5TB Small HF Transmitting Loop Antennas - I have been experimenting with small (generally less then 1/10 wavelength circumference) transmitting loop antennas in the HF bands for a number of years. I find them very useful when space for a full size antenna is limited. When care is taken during the construction to minimize resistive losses, performance can be very respectable. If an antenna can only be mounted very close to the ground, a small loop (when mounted vertically) will very likely out perform most other antennas due to their independence from lossy ground return currents and near hemispheric radiation pattern. This is not to say that a small loop doesn't have extra losses when mounted near the ground, but I find their performance rather amazing. Another advantage is the sharp nulls in the azimuth pattern that can be used to null out local EMI/RFI.

 

WHAMLOG Mediumwave DX Radio Antennas-DXing Antenna Resources Tons of info here.

 

The G3BGR Magnetic Loop THE G3BGR MAGNETIC LOOP - Article originally Published in SPRAT Summer 1989 Issue Nr 59 - This ia a home built Magnetic loop antenna which was used by G3BGR, indoors on 7,10 and 14Mhz. The basic idea was in Radcom 1986

 

loopschematic.htm To construct the 160m loop you'll need 20ft on RG-59. Fold the RG-59 in half. On the 160m loop, it would be about 10ft from the end. On the 80m loop, it would be about 5 ft. from the end. Etc. With Picture

 

antenneX Home Page The paper magazine that was read in 45 countries! Now this online version reaches 161 countries!

 

5 2 meter antennas 2 METER ANTENNA DESIGN GALLERY! - The J-pole is one of the most popular home-brew antenna designs for vertical 2 meter Amateur Radio.  Another interesting home-brew project is the Halo design horizontal 2 meter antenna.  I did some experimenting with a few variations of these type of antennas and came up with the designs posted on this page.  The main reason I considered building my own antennas was to gain a greater understanding of RF technologies and to save some money in the process.  Each antenna has a unique use and are actually fun to build.  Most of the parts can be found at your local hardware store. If you try one of these please drop me a line to let me know how it turned out.

 

HAM HOMEBREW AND ANTENNAS THE HOME PAGE OF N1YTA - DEDICATED TO HAM RADIO, HOME BREWING, AND ANTENNA BUILDING

 

Cable impedance This document tries to clear out some details of transmission lines and cable inductance. This document is only a brief introduction to those topics. If you expect to work much with transmission lines, coaxial or otherwise, then it will be worth your while to get a book on that subject. The ideal book depends on your background in phsics or electrical engineering, and in mathematics.

 

tiny2 antenna The "Tiny 2" is a great little 2 meter beam. I have built and used this little antenna for w meters, very nice.

 

Antennas by Rick Hiller This is a series of discussions of the use and applications of antennas. It focuses on the general aspects of design and construction from a practical viewpoint. This is a collection from a series of articles written and published in the B-VARC Bulletin.

 

CLICK TO LOAD GRAPHICS Graphic details and charts for building your antenna.

 

The All-Band Inverted-L W hen I wrote on "The L-Antenna" for 10-meters a few months back, I noted that the antenna was not likely new. I have since learned that the basic idea seems to have originated with VK3AM and is described in L. A. Moxon's (G6XN) classic HF Antennas for All Locations. This is a very detailed page.

 

Ham Antenna Links Many links here.

 

Antenna theory This as a tutorial with pictures and a chart.

 

Index of /tutorials/antennas This is an index of .gif pictures.

 

Force 12 - Tech Tip 1 - 40 meter tuning installation This is a commercial web site.

 

Plumbers Delight J Pole Antenna Project "Plumber's Delight" a simple and economical 2 metre antenna

 

Antennas A page of many antenna links.

 

Preventing Wire Antennas That Are Attached to Trees from Breaking in the Wind

 

mystery.htm, antennas W6RCA's No-Tuner, All-HF-Band, Horizontal, Center-Fed Antenna

 

Antenna 5 Wire antennas of different sorts and limited space antennas...Keith, WB2VUO

(not working on my last try(11/25/00)

 

MFJ-1792/1793 Instruction Manual 20/40/80 Meter Vertical Antenna MFJ-1792/1793 Instruction Manual

 

K5TR'S Antenna Files Page K5TR George Fremin III - ex.WB5VZL Antenna Designs - YO files These are antenna designs that I have collected from various sources. If you have any designs that you think I should add send them to me.(trouble with this one on 11/25/00 also)

 

Novice Dipole A Three Band Novice Dipole Antenna - Two Wires Cover Three Novice HF Bands.

 

MFJ-1776 Instruction Manual, dipole antennas

Listen-to My Short Wave Radio Project-Homebrew makes a jamin school project. gaurenteed A+ My CRYSTAL RADIO projects below are some projects i have done and are very easy to construct.

 

RF COILS CALCULATING COILS FOR THE HF BANDS - Several people have asked me about determining the number of turns of wire for a particular frequency when building QRP radio projects. I have many times given the ROUGH "starting" point:-(trouble with this one on 11/25/00 also)

 

CALCULATING COILS FOR HF by SM0VPO CALCULATING COILS FOR HF by SM0VPO - Several people have asked me about determining the number of turns of wire for a particular frequency when building QRP radio projects. I have many times given the ROUGH "starting" point:-

 

An AM RF Amp for Internal Antennas An AM RF Amp for Internal Antennas by Bruce Carter This page is based on the article: "AM Radio Booster" by Gary McClellan, Radio Electronics, April 1972, page 25.

 

AM Antennas AM Antennas by Bruce Carter This article relys heavily on information contained in several articles from decades ago:

 

page2.htm ANTENNA STUFF Long Loopstick Antenna - Wound on a 3 foot length of PVC pipe, the long loopstick antenna was an experiment to try to improve AM radio reception without using a long wire or ground. It works fairly well and greatly improved reception of a weak station 130 miles away. A longer rod antenna will probably work better if space allows. The number of turns of wire needed for the loopstick can be worked out from the single layer, air core inductance formula: