A question for antenna home brew experts.
WA5VJB has some great designs for easy build "cheap yagi's", problem is they are optimised for the wrong end of the band for satellite use.
The 70cms version is designed for 432MHz If I scale the element lengths and spacings by 432/436 will that move the antenna up in frequency to 436
Appreciate that its probably academic for receive, but it significant for transmitting.
73 John
G7HIA
On Wed, 22 Nov 2006, john heath wrote:
A question for antenna home brew experts.
WA5VJB has some great designs for easy build "cheap yagi's", problem is they are optimised for the wrong end of the band for satellite use.
The 70cms version is designed for 432MHz If I scale the element lengths and spacings by 432/436 will that move the antenna up in frequency to 436
Appreciate that its probably academic for receive, but it significant for transmitting.
73 John
G7HIA
The last section has a 435 description.
Al
# Al Bolduc - a.bolduc@comcast.net - ka1as@amsat.org
Hi John
Wa5vjb specked out a 435 antenna Just keep looking there several places on the web the have his antenna's it is on the bottom of the page on the web site I just looked at.
I built a set the 5 element 2 meter and an 11 element 435 used them for about a year before I went to the Gulf Alpha Cross I am using now. I made several hundred contacts with the setup. worked well
73
Brock
At 02:26 PM 11/22/2006, you wrote:
A question for antenna home brew experts.
WA5VJB has some great designs for easy build "cheap yagi's", problem is they are optimised for the wrong end of the band for satellite use.
The 70cms version is designed for 432MHz If I scale the element lengths and spacings by 432/436 will that move the antenna up in frequency to 436
Appreciate that its probably academic for receive, but it significant for transmitting.
73 John
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participants (3)
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Al Bolduc
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Brock Thomsen
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john heath