| Author |
Message |
    
Dcrusty
New member
Username: Dcrusty
Post Number: 9
Registered: 2-2005
| | Posted on Tuesday, October 11, 2005 - 10:51 pm: | 
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Years ago when we where building our own 4-6 element yagi's we used to flip them between horiz/ vert. with a mast mounted rotor.My question is can this be done with a quad? I have never seen it,maybe it does not work with a quad. But that would be a way to have the best of both worlds and only have one run of coax. Any ideas? Dcrusty |
Tech833
Moderator
Username: Tech833
Post Number: 1064
Registered: 8-2002
| | Posted on Wednesday, October 12, 2005 - 12:48 am: |
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Yes, it would work. |
Beeker7104
Junior Member
Username: Beeker7104
Post Number: 20
Registered: 12-2004
| | Posted on Thursday, October 13, 2005 - 3:02 am: |
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Hey tech833......Ever tried an old queen sized metal box spring set as a make shift beam? I did....and I was very impressed. Using only a bone stock washington base station radio I was successful talking to the southern most part of my home state here in ohio. |
Chad
Intermediate Member
Username: Chad
Post Number: 488
Registered: 11-2004
| | Posted on Thursday, October 13, 2005 - 8:58 am: |
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That wasn't fun to hike up the tower  |
Beeker7104
Junior Member
Username: Beeker7104
Post Number: 37
Registered: 12-2004
| | Posted on Friday, October 14, 2005 - 9:59 pm: |
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Nah,I just set in on top of house, then propped it up on the chimney. |
Tech833
Moderator
Username: Tech833
Post Number: 1067
Registered: 8-2002
| | Posted on Saturday, October 15, 2005 - 10:42 am: |
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I have heard of hams loading up all sorts of stuff for an antenna. If you can induce RF current into something, it will work. The question is, where is the RF going, and how much of it is lost! |
Marconi
Intermediate Member
Username: Marconi
Post Number: 439
Registered: 11-2001
| | Posted on Saturday, October 15, 2005 - 12:23 pm: |
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7104, whatever gave you the idea to drag boxed springs up on your roof to use as a CB antenna?
Did you get any comments from your neighbors?
Could you tell us how you hooked it all up so it would work? |
Hollowpoint445
Advanced Member
Username: Hollowpoint445
Post Number: 823
Registered: 6-2004
| | Posted on Saturday, October 15, 2005 - 4:19 pm: |
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I guess you don't live in hurricane or tornado country!
I heard a guy once claim that he was using his chain link fence as an antenna - supposedly because he was running so much power no antenna could handle it.
If it's metal you can load it up, but like Tech833 mentioned, it's all about efficiency. |
Marconi
Intermediate Member
Username: Marconi
Post Number: 440
Registered: 11-2001
| | Posted on Saturday, October 15, 2005 - 6:58 pm: |
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Boy, this is gettin' good now. I know a guy that loaded up a railroad track back of his house and had a 1200 mile longwire. |
Patzerozero
Senior Member
Username: Patzerozero
Post Number: 1689
Registered: 7-2004
| | Posted on Saturday, October 15, 2005 - 7:09 pm: |
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read a story about the military loading up a TREE as an antenna...yes, WOOD... |
Hollowpoint445
Advanced Member
Username: Hollowpoint445
Post Number: 827
Registered: 6-2004
| | Posted on Saturday, October 15, 2005 - 7:56 pm: |
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Marconi - I understand it was common for the railroad telegraph operators to spend their down time playing with other receivers connected the same antenna that their telegraphs were connected - the rails themselves. |
Outkast
Junior Member
Username: Outkast
Post Number: 32
Registered: 9-2005
| | Posted on Sunday, October 16, 2005 - 2:43 am: |
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Hmm Railroad huh? I live really close to the tracks. LOL I am thinking I might need one heck of a tunner or something though.
Outkast
CEF 650 |
Dcrusty
Junior Member
Username: Dcrusty
Post Number: 10
Registered: 2-2005
| | Posted on Monday, October 17, 2005 - 11:33 am: |
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Boy did this post go south!!!! I was just wondering if anybody fliped their quad between hortz/vert. and what kind of results they got? Bedsprings, railroad tracks,Hum, maybe I need to move.Marconi, I posted in another section that we were assemblying a s/e two element quad and we were having trouble with the hortz. swr. The vertical was fine.You stated in the same post that you believed you knew what the problem was but never posted it. We are still have problems with it and we sure could us some advice.We even went so far an removed the driven element, restreched the wire and made sure all the dim. were correct.Still at a 1.9 swr on 27.205 Any ideas? Thanks, dcrusty |
Marconi
Intermediate Member
Username: Marconi
Post Number: 449
Registered: 11-2001
| | Posted on Friday, October 21, 2005 - 7:01 pm: |
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Ok Archie try this. Remove the tip of the transformer wire from one side of the loop and tune the other side as though it was the only feed point. If everything is right, then this process should go smoothly because we have no possible interference from another feeder system attached to the loop. Now reconnect the other side. If the first side was in fact tuned as we would hope then the remaining side should only see a pure isolation from the correctly tune feed point on the loop. Now when you tune the remaining side you are tuning against a known variable that should be non-reactive. A variable that should be truly transparent to the remaining untuned side as it is excited. The remaining tune should also go smoothly.
Remember, in order for both sides of this antenna to be well matched within the minimum range for SWR noted by the inventor, the excited port must see a high isolation from the opposite system on the loop. If the feeders and the wire loop are not in sink, then proper isolation is disrupted.
It is my conclusion that if isolation is disrupted by one errant port on the wire loop then the wire loop appears longer to the port that is excited and being tuned.
Eddie |
Hotwire
Advanced Member
Username: Hotwire
Post Number: 648
Registered: 1-2005
| | Posted on Monday, October 24, 2005 - 12:31 pm: |
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Back when I first started as a kid there was a cber in the nieghborhood who was grounded to a train track until he got caught. He had a cable buried and the track maintence guys ripped it all out followed it right to his house.
Claimed that his swr was 1.1 and he could really tell it was alot better than say just a ground rod. I doubt you could ever transmit off a rail. |
Marconi
Intermediate Member
Username: Marconi
Post Number: 452
Registered: 11-2001
| | Posted on Monday, October 24, 2005 - 6:05 pm: |
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You are right Hotwire, RR tracks will not make a good ground nor an antenna. Regrettably I was ribbing Beeker a bit and being silly. |
