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-   -   Gamma fed or folded dipoles? (https://www.radiobanter.com/antenna/151449-gamma-fed-folded-dipoles.html)

tom May 28th 10 04:13 AM

Gamma fed or folded dipoles?
 
On 5/27/2010 2:54 PM, jure wrote:
On 21 svi, 07:22, wrote:
I am going to build an array of 4 stacked dipoles for operation on 2 metres.
I would like to know whether the gamma fed dipole has any advantage over the
folded dipole, apart from the folded dipole being a tad more difficult to
make.

I have heard that the gamma fed dipole has a skewed radiation pattern in
comparison to the folded one.

Any thoughts and advice?
Many thanks
John
VK2KC


The folded dipole with 1:4 baloon is best solution for maching
yagis .


EME operators, who have the greatest need of pattern control, noise
temperature and efficiency, would not agree. They use the T match.

tom
K0TAR

tom May 28th 10 04:36 AM

Gamma fed or folded dipoles?
 
On 5/27/2010 10:13 PM, tom wrote:
On 5/27/2010 2:54 PM, jure wrote:
On 21 svi, 07:22, wrote:
I am going to build an array of 4 stacked dipoles for operation on 2
metres.
I would like to know whether the gamma fed dipole has any advantage
over the
folded dipole, apart from the folded dipole being a tad more
difficult to
make.

I have heard that the gamma fed dipole has a skewed radiation pattern in
comparison to the folded one.

Any thoughts and advice?
Many thanks
John
VK2KC


The folded dipole with 1:4 baloon is best solution for maching
yagis .


EME operators, who have the greatest need of pattern control, noise
temperature and efficiency, would not agree. They use the T match.

tom
K0TAR


Oops. You are talking about just a dipole, so the above doesn't really
apply.

And neither does any worries about skew. If it skews on a dipole who
cares? Just turn it, if you can even tell it skewed.

tom
K0TAR

jure May 28th 10 08:27 AM

Gamma fed or folded dipoles?
 
On 28 svi, 05:13, tom wrote:
On 5/27/2010 2:54 PM, jure wrote:



On 21 svi, 07:22, *wrote:
I am going to build an array of 4 stacked dipoles for operation on 2 metres.
I would like to know whether the gamma fed dipole has any advantage over the
folded dipole, apart from the folded dipole being a tad more difficult to
make.


I have heard that the gamma fed dipole has a skewed radiation pattern in
comparison to the folded one.


Any thoughts and advice?
Many thanks
John
VK2KC


* The folded dipole with 1:4 baloon is best *solution for maching
yagis .


EME operators, who have the greatest need of pattern control, noise
temperature and efficiency, would not agree. *They use the T match.

tom
K0TAR


I do not think so . He is worse than the folded dipole . . .

JIMMIE May 28th 10 01:14 PM

Gamma fed or folded dipoles?
 
On May 27, 6:28*pm, jure wrote:
On 27 svi, 22:13, JIMMIE wrote:



On May 27, 3:54*pm, jure wrote:


On 21 svi, 07:22, "VK2KC" wrote:


I am going to build an array of 4 stacked dipoles for operation on 2 metres.
I would like to know whether the gamma fed dipole has any advantage over the
folded dipole, apart from the folded dipole being a tad more difficult to
make.


I have heard that the gamma fed dipole has a skewed radiation pattern in
comparison to the folded one.


Any thoughts and advice?
Many thanks
John
VK2KC


*The folded dipole with 1:4 baloon is best *solution for maching
yagis .


Over the last few years a I have started preferring using the folded
dipole for the *driven element also. I dont understand your need for
4:1 BALUN though.


Jimmie


*You must put the balun to have 50 Ohm .http://users.belgacom.net/hamradio/schemas/14balun.gif


Sorry, I got to thinking you were using it as the driven element of a
Yagi. I think my train of thought got derailed by someone elses
comment.

Jimmie

Jimmie


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