| Author |
Message |
    
Bushpilot169
Member
Username: Bushpilot169
Post Number: 63
Registered: 2-2004
| | Posted on Tuesday, May 24, 2005 - 12:16 am: | 
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Im getting ready to put up an 80meter dipole,and
i was just wondering should i run it north to
south or east to west for my best tx and rx. |
Marconi
Intermediate Member
Username: Marconi
Post Number: 427
Registered: 11-2001
| | Posted on Tuesday, May 24, 2005 - 10:29 am: |
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That was on your test old buddy. You should know that one. |
Bushpilot169
Member
Username: Bushpilot169
Post Number: 64
Registered: 2-2004
| | Posted on Tuesday, May 24, 2005 - 10:14 pm: |
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well when you get to ge my age you forget things,
i also have crs. |
Coyote
Intermediate Member
Username: Coyote
Post Number: 221
Registered: 11-2004
| | Posted on Tuesday, May 24, 2005 - 11:23 pm: |
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Maybe you can just tell us the answer. I wanted to know which it was since I don't have a ticket and have never took the test, I'd like to know.  |
Marconi
Intermediate Member
Username: Marconi
Post Number: 428
Registered: 11-2001
| | Posted on Wednesday, May 25, 2005 - 12:21 am: |
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If most of your traffic is east then string it north and south. The signals will be bi-directional to the broadside of the wire.
^
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v |
Coyote
Intermediate Member
Username: Coyote
Post Number: 222
Registered: 11-2004
| | Posted on Wednesday, May 25, 2005 - 6:42 am: |
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What if the dipole was mounted vertically? Just wondering. Would it still be the same? Or would it be more like an A-99 or an Imax? I've been toying with the idea of constructing one for 11 meter and just curious. Thanks. |
Bruce
Senior Member
Username: Bruce
Post Number: 2690
Registered: 9-2003
| | Posted on Wednesday, May 25, 2005 - 8:42 am: |
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A dypole can be mounted verital and would be like a A-99 |
Chad
Intermediate Member
Username: Chad
Post Number: 292
Registered: 11-2004
| | Posted on Wednesday, May 25, 2005 - 10:06 am: |
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And just may outperform it 
Chad |
Crackerjack
Advanced Member
Username: Crackerjack
Post Number: 527
Registered: 7-2004
| | Posted on Wednesday, May 25, 2005 - 11:05 am: |
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On my ships, several of them -the best reception on any HF circuit usually came from a Long Wire Dipole with a tuner.
The configuration, fore-aft running to the mast -gave it the configuration of an "Inverted V" which pretty much rendered it Omni Directional.
Anyway, nothing out-performed it. |
Marconi
Intermediate Member
Username: Marconi
Post Number: 429
Registered: 11-2001
| | Posted on Wednesday, May 25, 2005 - 11:42 am: |
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The problem with a vertical dipole is what to do with the feed line? If you run it like it should, it is akward, else its radiation pattern is very much skewed. Besides they are hard to support and get very high without attaching them close to a tower and then they probably will have a very much skewed radiating pattern again. That may not be bad, but it is something you have to consider.
The old Shakespear Big Stick was a sleeved dipole and that cleverly solved the problem of what to do with the feed line. It was inside the bottom half of the antenna. It was pretty effective in some installations.
Runing them horizontal is much more effective and simpler, but then you are horozontally polarized.
So you have to choose.
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Bruce
Senior Member
Username: Bruce
Post Number: 2691
Registered: 9-2003
| | Posted on Wednesday, May 25, 2005 - 1:20 pm: |
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Chad ...... On 40-10 meters all i run is a dipole ( HORZ ) but it works well enough for me to work around the world with 100 watts!
You never know!
BTW that dog is his teeth regestered in all 50 states ? My dashound thinks hers are. |
Bigbob
Senior Member
Username: Bigbob
Post Number: 1929
Registered: 12-2001
| | Posted on Wednesday, May 25, 2005 - 8:26 pm: |
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I saw a rotatable 1/2 wave 80 meter di-pole,turned very very slow,at feed point had bridge anchor with 60 and 40 lbs test mono-filiment stren for support,it only had to turn 90 degrees for world wide coverage,it...was...HUGE.LittleBob? |
Chad
Intermediate Member
Username: Chad
Post Number: 293
Registered: 11-2004
| | Posted on Wednesday, May 25, 2005 - 9:00 pm: |
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I went dipole while I was repairing the mast for my Imax that was recently damaged during some straight line winds. It's my backup antenna and made a bunch-o contacts this weekend.
The dog "Jax" is actually quite mellow, just don't tick him off, it takes a lot!
Rot's are working breed dogs, used for cattle hearding ant cart pulling, they need a "job" or they will get mean. I actually had him on the road with me for 4 years pulling 3 phase feeder and audio mulitcore, He was also my PR manager They will work till they fall over. His job now is keeping a 4 year old in check and making sire grass does not grow within 12 inches of the fence
Chad |
Crackerjack
Advanced Member
Username: Crackerjack
Post Number: 535
Registered: 7-2004
| | Posted on Wednesday, May 25, 2005 - 10:41 pm: |
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Chad: That dipole vertical?
I like a Hort Dipole for long haul, and at 10/11 meters you can run two with an antenna switch and cover 360 deg.
Or you can invert a V and be omni. They are extremely low noise and high on signal pickup.
I use an MFJ Tuner/Switch with mine. |
Coyote
Intermediate Member
Username: Coyote
Post Number: 223
Registered: 11-2004
| | Posted on Thursday, May 26, 2005 - 5:58 am: |
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I simply must build one of these. Thanks for everyone's input. |
Chad
Intermediate Member
Username: Chad
Post Number: 294
Registered: 11-2004
| | Posted on Thursday, May 26, 2005 - 2:19 pm: |
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Yeah it's vertical, I HAD a horz for east to west and a vert. The vert and one leg of the horz was in one tree and the the other tree held up the other end of the horz. Needless to say big wind took out tree#2 and now I have a vert and an Imax
As Marconi said with a vert the feedpoint is a big pain.
Mine hangs with a weight holding it straight. Then I used a pick (rigging term) point to pull the feed point out. It takes some time but you can get it so it doesn't look like this "<"
The 4 year old thought that was fun... getting to toss stuff into a tree without dad hollering |
Allagator
Advanced Member
Username: Allagator
Post Number: 608
Registered: 9-2002
| | Posted on Thursday, May 26, 2005 - 4:45 pm: |
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Coyote ive been running a dipole on 11 meter for some time and it works great if you have tall tress to hang it from !
Allagator |
Bigbob
Senior Member
Username: Bigbob
Post Number: 1935
Registered: 12-2001
| | Posted on Thursday, May 26, 2005 - 9:42 pm: |
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11 meters is still small enough to use aluminum tubing and balanced line and a 4 to 1 balun or you can get a gamma match,sounds like fun. |
Crackerjack
Advanced Member
Username: Crackerjack
Post Number: 541
Registered: 7-2004
| | Posted on Thursday, May 26, 2005 - 10:57 pm: |
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Big Bob:
I used copper tube once and a rotor, it was quite an antenna. |
Coyote
Intermediate Member
Username: Coyote
Post Number: 224
Registered: 11-2004
| | Posted on Friday, May 27, 2005 - 10:15 pm: |
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Allagator, do you have it set up vertical or horizontal. I got plenty of tall trees. Huge pines 50ft or better. |
Bushpilot169
Member
Username: Bushpilot169
Post Number: 65
Registered: 2-2004
| | Posted on Friday, May 27, 2005 - 10:54 pm: |
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hay thank's a bunch guy's. now i have an idea as to how to run my dipole |
Bigbob
Senior Member
Username: Bigbob
Post Number: 1944
Registered: 12-2001
| | Posted on Saturday, May 28, 2005 - 7:50 am: |
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Just in case you missed the obvious the driven element of a beam antenna is a di-pole.Bigbob |
Mikefromms
Advanced Member
Username: Mikefromms
Post Number: 634
Registered: 6-2003
| | Posted on Saturday, May 28, 2005 - 12:16 pm: |
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If you run it vertical bury some mesh or copper wire beneath the dipole in a circle to give it a better groundplane or hang it over a concrete driveway that has wire already in the ground placed there as a form for the concrete to hold it together. Works wonders. Wire is amazing and simple for antenna design. The vertical loop is one worth trying as well and with all these wire loops the wire does not have to be that big. Try 14 or 18 gauge electrical insulated wire.
mikefromms |
Bigbob
Senior Member
Username: Bigbob
Post Number: 1948
Registered: 12-2001
| | Posted on Saturday, May 28, 2005 - 10:23 pm: |
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Why stop here,a circular copper or aluminum hoop about 6'(circumference divided by pi)cir.being a 1/2 wave,4 metal spokes insulated at hub and gamma matches for vert./horiz. |
Indiana375
Junior Member
Username: Indiana375
Post Number: 37
Registered: 3-2005
| | Posted on Thursday, June 02, 2005 - 12:10 pm: |
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I have a question. I was told that if I set up a diploe in an "L" shape rather than horizontal or vertical, I would get the best of both worlds. Is this true?
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Sg569
Intermediate Member
Username: Sg569
Post Number: 127
Registered: 12-2004
| | Posted on Thursday, June 02, 2005 - 3:27 pm: |
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Indiana, I did that the other day, and was told that I was quiet(that was also w/ a 3.5:1 swr/ I know I should not have been talking on it.) Since then I have not had a qso w/ any one I really trust to give me feedback. BTW the match on that dipole is now down to 1.2:1 on stock 40 ch.
I am considering putting up two co-phased 1/4 wave dipoles just for "grits and shins" a buddy of mine suggested it. I kinda wonder how that would work w/ both of them tacked to the wall and ceiling if my bedroom? |
Bruce
Senior Member
Username: Bruce
Post Number: 2786
Registered: 9-2003
| | Posted on Friday, June 03, 2005 - 7:26 am: |
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Indiana375
The L shape would be a sideways inverted V and yes you will get both however at the cost of some signal from each
There are ways of co phaising dipoles and it can be done by switching in and out 1/4 wave hunks of coax |
Indiana375
Junior Member
Username: Indiana375
Post Number: 40
Registered: 3-2005
| | Posted on Monday, June 06, 2005 - 10:56 am: |
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Thanks everyone!! I'm wanting to build one that will give me vert and horiz.
CEF 530
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Bruce
Senior Member
Username: Bruce
Post Number: 2812
Registered: 9-2003
| | Posted on Monday, June 06, 2005 - 1:05 pm: |
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INDIANA
GO FOR IT! Nothing more pleasing that to say
I BUILT IT AND IT WORKS! |
Crackerjack
Advanced Member
Username: Crackerjack
Post Number: 626
Registered: 7-2004
| | Posted on Monday, June 06, 2005 - 1:59 pm: |
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Amen Bruce. We are going to put up a dipole pointing North-North-East/South-South-West and shoot into Mexico to our Mission.
The positive side effects are that it that I live less than a mile from the interstate -which runs the exact same directions, it will shoot directly over San Antonio and Austin, and shoot directly at Tech808. LOL
This is on my list as NEXT after I put the REACT monitor on line. |
Slugo4449
Member
Username: Slugo4449
Post Number: 70
Registered: 7-2004
| | Posted on Thursday, February 02, 2006 - 10:07 pm: |
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Dipoles are great fun to build. Just remember that if the SWR is high on channel 40 and lower on channel 1 then you need to trim the dipole(both sides equally). If it is lower on channel 40 and higher on channel one, then you have to add length to both wires. The higher in frequency that you go, the smaller(shorter) the antenna. I always add extra lenght to the dipole and then trim it to the proper resonating frequency.
Marty |
Kid_vicious
Senior Member
Username: Kid_vicious
Post Number: 1136
Registered: 9-2004
| | Posted on Thursday, February 02, 2006 - 11:31 pm: |
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if people are interested in experimenting with wire antennas; dont forget about the "half-square" antenna.
all you need is an SO-239 connector, about 40 feet of wire, and the coax. (some trees are helpful too)
they are bi directional, they only need to be 102" off of the ground, will give a great SWR if built right, AND show about 3db gain over a dipole!
i have one in the yard. great antenna!
matt |
Rldrake
Junior Member
Username: Rldrake
Post Number: 46
Registered: 1-2006
| | Posted on Friday, February 03, 2006 - 12:12 am: |
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On your 80 meter dipole...How high will it be mounted? Down at 80 meters it will not matter which direction you orient it...it will not have much of any, if at all, any directivity until it is elevated at about 132 feet....twice that before it really becomes directive to any direction. On the lower frequencies (40, 60, 75/80, & 160 meters), low height dipoles radiate straight up and down. Most of the radiated signal is put into the ground (wasted) and the rest (useful) goes straight up and then reflected down and out (usually out to 600 to 800 miles) by the ionosphere. |
Mrclean
Junior Member
Username: Mrclean
Post Number: 29
Registered: 12-2003
| | Posted on Monday, February 06, 2006 - 3:55 am: |
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Man Chad that Rott is a fine looking dog. I had a female named Sadie. She was a big girl at 125 lbs. She died a year ago. Febuary 4 of last year. I cried like a little girl and still find myself talking to her. Had her cremated. I dont have any kids so she was my baby. I got two little Toy fox terriers now and they are great little dogs but I will always miss my big girl |
Ak3383
Junior Member
Username: Ak3383
Post Number: 21
Registered: 11-2005
| | Posted on Friday, March 24, 2006 - 1:38 am: |
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Mrclean, Hi, I am sorry to hear about your friend. I got my best buddy (the first dog I ever Had) from the Humane Society and Love her to no ends. I really didn't know smart they are. And her personality is like she knows how I feel and what to do. They are Angels on Earth. Sorry if off topic, just had to respond. AK-3383 Central IN ch.38 LSB |
