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619
Intermediate Member
Username: 619
Post Number: 104
Registered: 12-2001
| | Posted on Tuesday, January 18, 2005 - 8:28 pm: | 
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I would like to try and make an 11 meter dipole antenna. What should i use for the insolators, and where can i get them? thanks 619 |
Kid_vicious
Intermediate Member
Username: Kid_vicious
Post Number: 149
Registered: 9-2004
| | Posted on Wednesday, January 19, 2005 - 4:05 pm: |
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the insulators are available at rad shak or home depot. look in the section for TV antennas or you can make your own. buy a few feet of 1" pvc pipe and cut some 3" pieces. drill a hole all the way through each side. loop the antenna wire through one side and the tensioner wire through the other side. i like to loop the wires through opposite ends so that if the insulator breaks, the wires are hooked together. did that make sense? it would if i had a picture.
remember, 102" for each element.
matt |
619
Intermediate Member
Username: 619
Post Number: 105
Registered: 12-2001
| | Posted on Wednesday, January 19, 2005 - 7:03 pm: |
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Thanks KV, As with other antennas-should i put it as high as i can get it. also is this antenna known for bleed over, Because i am in a neighborhood. I do not run extra power and the limiter is intact. |
Kid_vicious
Intermediate Member
Username: Kid_vicious
Post Number: 155
Registered: 9-2004
| | Posted on Thursday, January 20, 2005 - 8:21 pm: |
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yeah, higher is always better. remember that a dipole mounted horizontally (parallel to the earth) will shoot its signal towards the front and back of the antenna, not out the ends. so point it away from the neighbors house if possible. if your house has a peaked roof, then you can mount the middle of the dipole at the peak and run the elements down the facia board. as long as the angle is less than 45*, it should work well. this is called an inverted "V".
if you mount the antenna vertically, then it will radiate omnidirectionally but will not perofrm well unless its quite aways above the ground. wire antennas do bleed a bit, but if you use insulated wire for the elements, then it will have less static and bleed less. if you are getting bleedover, use a good low pass filter.
matt |
Mikefromms
Intermediate Member
Username: Mikefromms
Post Number: 377
Registered: 6-2003
| | Posted on Saturday, January 22, 2005 - 10:57 am: |
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Wire antenna are fun. They are fun to build and easy to build. I've also found that you don't have to use giant wire as I once believed. You can use 14 gage insulated strainted electrical wire for a light set-up. If I measure 8' 6" from the center insulator to the end insulator (on each leg) I have a perfect match on most cb channels. If you use coax to feed the dipole, wind 6 to 8 turns of 6 to 8" long lengths of the coax just before it feeds the dipole around some pvc to choke off any signal flow that might travel down the sheilding. Don't worry though, I've used them with RG8x coax without a choke with good results. Dipoles can really perform. Also, learn about the wire loop. The wire loop is quiter and will outperform the dipole in many situations.
mikefromms |
Bluegrass
Intermediate Member
Username: Bluegrass
Post Number: 205
Registered: 12-2004
| | Posted on Thursday, March 10, 2005 - 6:39 am: |
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How much power can a dipole cb antenna take? |
Pig040
Advanced Member
Username: Pig040
Post Number: 727
Registered: 7-2003
| | Posted on Thursday, March 10, 2005 - 10:19 am: |
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How much you got?? I saw a friend of mine put 10k through a long wire antenna.
Rich |
Allagator
Advanced Member
Username: Allagator
Post Number: 558
Registered: 9-2002
| | Posted on Friday, March 11, 2005 - 8:43 pm: |
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619
My GATOROD'S are a half wave Dipole made from aluminum pipe and i have pushed lots of power to it , and even had some friends shove some power of the big comp amp's in to it ! and the only thing i have found it that it dont like it lightning and power lines !!!!
but from wire Dipole it how big your wire is for the Dipole !
the bigger the wire the more power you can run to it !!
i used to have a scale to tell you how much power you could run but i lost it when i had to redo my comp !!!
Hope this helps !!!
Allagator
CEF 115
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Bluegrass
Intermediate Member
Username: Bluegrass
Post Number: 215
Registered: 12-2004
| | Posted on Saturday, March 12, 2005 - 8:55 am: |
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COOL!!! |
Snapperhead
Intermediate Member
Username: Snapperhead
Post Number: 200
Registered: 2-2002
| | Posted on Saturday, March 12, 2005 - 9:48 pm: |
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I was reading some the posts on Dipole's. I'm running one right now. It's a made of 14g insulated wire that I picked up from are local TrueValue hardware store. I am running a 1:1 to 1 Pro Balun. Wires are 8.06 inches and I have a match of 1:2 to one...The circumstance I'm in is, I'm in a area with strong CCR restrictions...."NO Antenna's" they say.....So I had to make some sacrafices on erecting my I-Max 2000 and my 2 element SE quad. This is my first Homebrew, if you will, of a Dipole Wire antenna.....I'm running wires on the flat side from North to South, surface mounted on peak of roof....It performs ok, but I sure do miss my Omni groundplane, especially on local chatter....My only downfall is I'm picking up alot of static on my RX.....Daytime is usually around 4 to 5 S units and Night time it simmers down to 2 to 3 Sunits.........I don't have any power lines close by, or no metal objects, except for a few air vents and what not kinda near antenna.....The other is RF in the house......Mama gets a littler puckered up when I'm coming over the TV.......I tried a few ferrites on the phone wich it did help.......It didn't seem to work on the TV's though.....I'm only pushing around 100 or so on my Kenwood.....
I'm kinda interested in the Wire Loop that MikeFromMS was talking about.......He said quieter.....In noise that the wire picks up? Any info would be great on this topic.....73's
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Chad
Intermediate Member
Username: Chad
Post Number: 202
Registered: 11-2004
| | Posted on Saturday, March 12, 2005 - 10:25 pm: |
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I have a backup Dipole in the trees now, do you have trees at your house?, I posted earlier about the burilal cable I have and it works well. a full wave inverted V or vert dipole in a tall tree would probably work well for you. Do factor in tree growth when measuring feedline, dernit  from expierience Dipoles work well, I think if it were away from the house a little, it would please the XYL more and maybe cut down on noise.
Chad |
Snapperhead
Intermediate Member
Username: Snapperhead
Post Number: 201
Registered: 2-2002
| | Posted on Sunday, March 13, 2005 - 8:35 am: |
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Hey Chad, actually, this housing track I just moved into is a new devolopment. The trees are very small, just little guys.......I am surface mounted to the peak of the roof, I was wondering if that had something to do with noise. I also have a 8 foot grounding rod, wich I'm running a good piece of wire from back of Kenwood to it.......Thanks for reply.....73's
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Marconi
Intermediate Member
Username: Marconi
Post Number: 405
Registered: 11-2001
| | Posted on Sunday, March 13, 2005 - 12:59 pm: |
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Hey Snapperhead, do you check with locals about the noise from time to time?
Does your dipole ever get quite or is it noisy all the time? |
Snapperhead
Intermediate Member
Username: Snapperhead
Post Number: 202
Registered: 2-2002
| | Posted on Sunday, March 13, 2005 - 1:33 pm: |
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Hey Marconi, It does get quite from time to time...........73's
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Willie
New member
Username: Willie
Post Number: 7
Registered: 5-2002
| | Posted on Sunday, March 13, 2005 - 4:45 pm: |
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hello fellows.
you sure can use the inverted v it is omnidirectional but is horz. polorised and a good antenna. common thought is it isn't as good as the flat dipole strung north south or the east-west if it is low you have omni directional radiation too. there is a formula for dipoles that is for 1/2 wave dipole 468/frequency. for 1/4 wave dipole it is 234/frequency. most verticle antenna use this formula.
hope this helps anyone that needs the formulas and you can also use a ham tuner on the wires, just match them to the power you will be running
willie |
Snapperhead
Intermediate Member
Username: Snapperhead
Post Number: 203
Registered: 2-2002
| | Posted on Sunday, March 13, 2005 - 5:39 pm: |
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Hey there Willie, I do have a inverted V as well as a flat dipole.....My inverted V is a little lower than my Flatside Dipole.......I don't have a balun on that one. It to has a good match at 1:2 to 1.....for some reason, my flatside dipole seems to perform better than the V......I have V on side of the house erected with a pushup poll......I still get the static on both antenna's........Thanks for the info....73's
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Willie
New member
Username: Willie
Post Number: 8
Registered: 5-2002
| | Posted on Sunday, March 13, 2005 - 7:23 pm: |
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snapperhead
hello, with the inverted vee you can bring the swr down by adjusting the angle of the vee it can be brought to 50 ohms that way as i understand it from the antenna books. the swr can also be adjusted by trimming the ends of the wire a little at a time. the vee is also 5% shorter than your flat top, there again according to the books, the v has a sort of ball afair overhead in its signal, and is pretty much omni-directional, where the flat top has lobes off each side and dead spots too called nulls, but then you may already know about that. not trying to be smart, just trying to be a help and not hinder. any thing that will work on the ham frequencies 10 to 12 metersand down to 80 will work with cb the antennas included. just the wires are horizontaly polerized and will be down some dbs from a verticle.
someone was talking about a verticle. they work better if you can put out some radials (wire) on the ground or a couple inches below the ground just enough to keep it out of the mower, the more the better and tie them all to the mast 1/4 to 1/2 wave length is good. will work with A-99 too. use the covered wire if possible.it seems to be a little quieter, and for running through trees. for an antenna that isn't noticeable you can use 18-20 guage wire and attic antennas are good, heh, you can contort a dipole, ie, bend it even up to half of each leg and it will work, just don't bend it too far back under its self. you can also use twinlead to feed your antennas just have to use a tuner though.or balun 4:1 or more.
73 and have a really good week
willie |
Willie
New member
Username: Willie
Post Number: 9
Registered: 5-2002
| | Posted on Sunday, March 13, 2005 - 7:34 pm: |
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hey snapper head
try the formula 1005 divided by the frequency for a loop. they can be used as little as 4feet off the ground , i believe they said. feed it at one side bout foot, foot and half should do it ,tie down two corners and float two, use one of the tied corners for the feed. there again a tuner is a handy thing.
willie |
Chad
Intermediate Member
Username: Chad
Post Number: 203
Registered: 11-2004
| | Posted on Sunday, March 13, 2005 - 9:44 pm: |
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So does everybdy have cable?, Isn't a dish considered an antenna? Can you not have a TV antenna? How 'bout an outside FM antenna. Sheesh, seems a little harsh that you can't have a choice on how you watch TV, listen to the radio, or have a hobby for that matter. I REFUSE to pay the cable company 50 bucks a month for basic cable when I can suck the news out of the sky for free, and it looks better than the cable system here in this one goat town. But, I watch about 3 hrs of TV a week, if I'm feeling lazy, the news.
Chad |
Racer_x
Intermediate Member
Username: Racer_x
Post Number: 156
Registered: 2-2005
| | Posted on Monday, March 14, 2005 - 10:03 am: |
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As an amateur radio operator there is no homeowner agreement that supersedes your right to operate as long as you own the property. Of course, if you don't actually own the property then you don't really have any rights. Condos would be a good example, most condo agreements say that you own the inside of the building and not the outside, so in that case you have very little leverage. The ARRL has some information about it on their website.
Lon - What are you talking about with the 6 meter TV antennas? |
Tech808
Moderator
Username: Tech808
Post Number: 5238
Registered: 8-2002
| | Posted on Monday, March 14, 2005 - 8:50 pm: |
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Moderators Note!
The topic on the 6 Meter Band has been moved to the:
CB and Ham Legal Discussion Area
» 6 Meter Ham Band Discussion
Please make all of your post's there on this topic.
Thank You!
Lon
Tech808
CEF808
N9OSN
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