End Fed or Dipole - Elmers Forum at eHam.net

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eHam.net Forum : Elmers : End Fed or Dipole

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End Fed or Dipole	Reply
by KD8HZC on January 24, 2009	Mail this to a friend!
Going to take my general test on Feb 1st. Looking at my yard I need some suggestions for a HF antenna. I don't have a rig yet, but the tax man may provide the funds for that. I am working on a 40' tower next to the house. 1) If I use some sort of dipole, I would end up with a coax run of around 200' just to feed it. Plenty of 40'+ trees to string one up in. Just my house is on the side of the lot and there is nothing to hang one on near the house. (other than the tower) 2) An end fed of some sort could be erected with the fed end near the tower, and strung out as far as needed. You can check the satellite images here: http://www.findu.com/cgi-bin/find.cgi?call=KD8HZC Just hate to have to bury coax if I can get away from it. Bob

RE: End Fed or Dipole	Reply
by AC5UP on January 24, 2009	Mail this to a friend!
Consider an off center fed dipole AKA "Coaxial Windom"... http://www.buckscom.com/windom.htm

RE: End Fed or Dipole	Reply
by W7ETA on January 24, 2009	Mail this to a friend!
My first antenna was a 40/80 trap inverted Vee strung from a 5 foot extension ontop of the 5 foot mast for a TV antenna on a two story house. I wasn't allowed on 20 meters at the time. If I was, I probably would have added a 20 meter inverted Vee at the same feed point. I had tons of FUN with that antenna which also loaded nicely on 15 meters. Since I was allowed on 10 meters, and it was open, I used a CB ground plane for 10. 73 Bob

RE: End Fed or Dipole	Reply
by K0ZN on January 24, 2009	Mail this to a friend!
Hi, Bob. Glad to hear you are getting on HF...that is great. First, and I mean this with total respect and as a positive suggestion: At this point, by far, the best and cheapest investment you can make in an HF antenna system is to pick up a copy of the ARRL Antenna Book (an older copy off Ebay is CHEAP!) and/or ON4UN's EXCELLENT antenna book, "Low Band DXing"...title is not really appropriate...it is essentially and antenna book...and a very good one. Put in few hours of serious study and really looking at the types of antennas and get a good basic understanding of HOW they work and the different characteristics and pro's and con's of each type. There are MANY types of antennas that could work well for you. Also, with a little knowledge you can greatly lower your frustration and potential troubles. The time you spend with these books will be VERY WELL rewarded and will save you money and add to your enjoyment of the hobby. It is like the old saying: "What you get out of something, is equal to what you put in to it." i.e. while you can get some good ideas and comments on an internet site like this, there is NO substitute for an organized, systematic and graphic educational forum like one of those books. Antennas and the options related to what may be best at your QTH is really way too complex for a couple of blurbs on a website. Good luck & 73, K0ZN

RE: End Fed or Dipole	Reply
by N6AJR on January 24, 2009	Mail this to a friend!
also do a search on google for home brew antennas or fan dipoles. lots of info available. you can build a decent antenna for 15 or 20 bucks, less if you scorunge a bit. find an elmer locally, some one will help go to ARRL.ORG and in the upper left click on exams, type in your zip code and hit enter. this will bring up a list of ham tests in your local area. most of these are sponsered by a ham club. they all have a contact person and phone number. call and ask about the next meeting, for an elmer , how do I .... some one will take you under their wing.

RE: End Fed or Dipole	Reply
by N6AJR on January 24, 2009	Mail this to a friend!
and on hf, a 200 foot run of most any decent ( better than rg58) coax will work fine. losses are low on HF and really aren't bad up to 10 meters for so rg8x or rg 8u

RE: End Fed or Dipole	Reply
by W8JI on January 25, 2009	Mail this to a friend!
Bob, With an end fed you open a can of worms for feeder radiation. A Windom is a little better, but still has that problem. I'm not saying people don't use them, just that they have limitations. An Inverted Vee dipole or a fan dipole made of Inverted V dipole antennas, or a ladder line fed dipole with a tuner should fit on that tower or in your lot. 73 tom

RE: End Fed or Dipole	Reply
by KC8VWM on January 25, 2009	Mail this to a friend!
Also keep in mind many people have the misconception that a single band dipole antenna only functions as a single band antenna. I think you will find a dipole constructed for the 80m band when used with an antenna tuner will provide you will very good results on just about any band of your choosing. gl on the exam es 73 de Charles KC8VWM

RE: End Fed or Dipole	Reply
by KD8HZC on January 25, 2009	Mail this to a friend!
Thanks for the info. I have the antenna books on order. I have built all the VHF antennas I have with the exception of the 2M BOZAK collinear that I bought. I currently use a 4 elm quad for 2 meter and a GP and 6 element yagi for 440. I joined a local club that will be administering my test. I have room to put up almost anything I want for HF, just not a beam. Too bad I can't use the utility pole by my garage (has the elec feed to the neighbors house) then s dipole with the feed near the house would be possible. Bob

RE: End Fed or Dipole	Reply
by K3MOV on January 25, 2009	Mail this to a friend!
Here is the site for the DX Engineering Multiband antenna fed with very low loss 300 ohm line. (http://preview.tinyurl.com/aadvcc ). It would be difficult to make an antenna of this quality for the price they charge. If nothing else, I suggest you read the product description and installation instructions for infomational purposes. GL es 73, Tom K3MOV

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