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 Post subject: Re: passed!
PostPosted: Sun Jan 24, 2010 5:15 pm 
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Angus Cheeseburger
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Joined: Thu Feb 19, 2004 5:09 pm
Posts: 4765
Location: CN88st
Nick,

The inverted V is the way to go it sounds like.

In that configuration it might even be possible to move the positions of the far ends of the antenna to radiate in different directions. Wow... not quite a beam but not stuck in just two directions. I'll have to give it a try. Of course the center support must not be metal because that would mess things up. Getting one pole up 30 or 40 feet is a lot easier than stringing an antenna between two things 30 or 40 feet above the ground.

Good luck and let us know how well it works out.

I have often wished I had purchased the B & W instead of the Yaesu since it will take a lot more power but am glad the Yaesu is much lighter weight and easier to put up. It has been up for over 10 years and still is in one piece despite the weather.
Should take it down this summer and clean it up and replace the coax.

Maybe I'll try the G5RV in the inverted V. You got me interested now. :D

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 Post subject: Re: passed!
PostPosted: Sun Jan 24, 2010 10:27 pm 
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Joined: Sat Sep 04, 2004 5:48 am
Posts: 1193
Location: here and there
I would recommend a doublet over a G5 better matching there isn't anything special at all about a G5 its just very marketable.

LOOP LOOP LOOP

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If I had an antenna, I would; but I can only transmit on 160 meters.
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 Post subject: Re: passed!
PostPosted: Sun Jan 24, 2010 11:08 pm 
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Joined: Mon Jan 03, 2005 1:17 am
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Location: Bellevue, WA
So, I thought the G5RV was essentially a doublet already?? I remember reading a recent QST mag about using ladder line instead of coax - since the losses will be less. However, the other argument was that if you use RG213 or better (a short run, i.e. less than 50ft) then it's almost a crapshoot as far as performance is concerned. Is there another advantage?


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 Post subject: Re: passed!
PostPosted: Mon Jan 25, 2010 10:26 am 
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Joined: Sat Sep 04, 2004 5:48 am
Posts: 1193
Location: here and there
nickcarr wrote:
So, I thought the G5RV was essentially a doublet already?? I remember reading a recent QST mag about using ladder line instead of coax - since the losses will be less. However, the other argument was that if you use RG213 or better (a short run, i.e. less than 50ft) then it's almost a crapshoot as far as performance is concerned. Is there another advantage?


basically BUT, the G5RV is mostly advertising, it was a 20m antenna built by G5RV back in the day. its a doublet that was made for 20m someone lengthened it and call it all-band

so the thing about the ladder line is that its not just feed its also a matching section, that's the key of a doublet over a G5 is that you typically have a longer matching (or feed) so you can effectively match the lower frequency. you then would cut to a tuner that can take a ladder line, or a 4:1 balun then with a short length of 75,50 etc to match back to 50 depending on your setup

we arnt talking performance here, antenna performance is like ford/chevy debate performance is SO MUCH more then just a "brand or type" of antenna. if you want performance then cut a dipole to the frequency that you use and remove that tuner. we are all talking dipoles and there is SO much more then dipole type for performance. and if you have a tuner... performance suffers

you must balance performance with user-ease thats where the G5 comes in so marketable. it has a pl259 on one end close to 50ohm, works all or most bands reasonably well on most home lots.

if you cant tell I hate the G5RV its great to have as a first antenna. but they are lousy IMO a loop or doublet for "all band" is so much better, cheaper and efficient (I didn't say performance because again performance has a LOT more factors then type of antenna) it takes the same time to put up and fills the same room on your lot

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If I had an antenna, I would; but I can only transmit on 160 meters.
_____
DE K7MHI


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