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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 |
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 |
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 . . . |
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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