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 33 feet vertical 
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Post 33 feet vertical
Hi has anyone tried the 33 feet vertical wire with two 33 feet horizontal ground planes these have to be roughly 6 1/2 feet off the ground and in line with each other


Sun Jan 03, 2016 10:39 pm
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 33 feet vertical 
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Post Re: 33 feet vertical
When you say in line with each other do you mean in a straight line but running in opposite directions?

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Sun Jan 03, 2016 11:42 pm
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 33 feet vertical 
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Post Re: 33 feet vertical
yes like an upside down T


Mon Jan 04, 2016 7:28 am
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 33 feet vertical 
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Post Re: 33 feet vertical
Never even heard of such a thing. Why do the radial wires HAVE to be 6.5ft up?

D

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Mon Jan 04, 2016 7:36 am
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 33 feet vertical 
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Post Re: 33 feet vertical
Hi i seen this antenna online it says the ground wires have to be that height sorry i cant find the site that it was on


Mon Jan 04, 2016 7:45 am
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 33 feet vertical 
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Post Re: 33 feet vertical
in your browser history perhaps?


Mon Jan 04, 2016 7:48 am
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 33 feet vertical 
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Post Re: 33 feet vertical
Interesting. So a 10m fishing pole, glass not carbon, on a fence post with radials stretching out. That will do it. Give it a go. Might try it here too. The elevation of the radials will be difficult along their length though

It sounds like a simple compromise ground plane. The six ft elevation is to avoid human heads I'll wager. I'd like to compare it to my vertical design in use here (seen my qrz pages). I'll bet it's no better but more cumbersome.

David

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Mon Jan 04, 2016 7:50 am
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 33 feet vertical 
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Post Re: 33 feet vertical
Hi it was said it was hung from a tree the vertical part and was handy for portable or base use ill give it a go when the blooming rain stops


Mon Jan 04, 2016 8:17 am
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 33 feet vertical 
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Post Re: 33 feet vertical
Don't forget the 4:1 balun



D

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Mon Jan 04, 2016 8:21 am
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 33 feet vertical 
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Post Re: 33 feet vertical
no balun was used i have a dipole center that takes coax i will use that plus the 10m pole i wont be able to have the ground planes full length straight as i dont have the room


Mon Jan 04, 2016 8:35 am
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 33 feet vertical 
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Post Re: 33 feet vertical
I'm using similar for 40m and IMO it works well. You may have to, instead of running the counterpoises 6.5ft parallel to the ground start them at that height but slope them downwards to achieve a good SWR.

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Mon Jan 04, 2016 8:48 am
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 33 feet vertical 
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Post Re: 33 feet vertical
With no balun its a single band antenna then as far as I can see. And with shorter radials you'll have a goo chance of RF in the coax. I might be wrong but it seems that you are compromising a compromise, but I'd be intrigued by your results. Im not at all clear how you can get much success from it with no balun or unun except on the one band and even then with shorter radials (because now it's unbalanced again). However, I wish you luck...it's always fun to experiment. And I speak with optimism, as one who has been told categorically that the aerial I work the world on 'cannot work'. Ho hum



As Conor says, the slope can be used to affect the SWR.


D

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Mon Jan 04, 2016 8:52 am
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 33 feet vertical 
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Post Re: 33 feet vertical
G4YVM wrote:
With no balun its a single band antenna then as far as I can see. And with shorter radials you'll have a goo chance of RF in the coax. I might be wrong but it seems that you are compromising a compromise, but I'd be intrigued by your results. Im not at all clear how you can get much success from it with no balun or unun except on the one band and even then with shorter radials (because now it's unbalanced again). However, I wish you luck...it's always fun to experiment. And I speak with optimism, as one who has been told categorically that the aerial I work the world on 'cannot work'. Ho hum



As Conor says, the slope can be used to affect the SWR.


D


He made no mention of multiband and as it's 1/4 wavelength 40 I just assumed he'd be content it working good on that band and anywhere else would be a bonus, for instance, if it behaves anything like mine it'll also be a damn good resonant vertical on 15m.

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Mon Jan 04, 2016 4:19 pm
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 33 feet vertical 
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Post Re: 33 feet vertical
Yes, thats fare enough. A quarter wave should be good I reckon. It is basically a half horizontal, half vertical, halfwave dipole then.

D

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Mon Jan 04, 2016 4:58 pm
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 33 feet vertical 
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Post Re: 33 feet vertical
No, it's a quarter wave vertical.
Raised radials are FAR more efficient than buried radials, and as such, far fewer are required.
I've used 40m 1/4 waves on and off for years, with 2 or 4 raised radials (usually sloping at 45 deg) and they're great !
Think of your average 2m "white stick", same principle !!!

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Mon Jan 04, 2016 6:08 pm
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