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Author Topic: VHF-UHF HOMEBREW ANTENNAS  (Read 4454 times)
WB2RXF
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Posts: 16


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« on: September 27, 2000, 02:09:57 PM »

I recently built my first yagi for 432MHZ weak sigs. Using the DL6WU Program that comes included with yagimax off of QRZED. with 10-FEET of conduit or 118 inches, 16 elements made from aluminum groundwire from radioshack, equivlent to 8gauge wire and 3 1/4 inch copper tubing for the driven element, the reason for the wide copper is I was told thats it was more forgiving for swr purposes, since it was going to be directly fed. I made one contact 75miles northeast of me on simplex FM, and good report of s5, and thats without and amp. Not bad for 39$ worth of parts. Any comments on my latest project? drop me a line. WB2RXF.
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KD4HUR
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Posts: 1




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« Reply #1 on: January 05, 2001, 11:01:49 PM »

If you want a good driven element that is trouble free, easy to tune , find yourself an old
cushcraft AOP-1 oscar 435mhz antenna, it will have 2 driven elements which are T-Match
elements with 93ohm coax teflon baluns. Elements are made from 3/16" aluminum.

P.S. My antenna elements are 3/16" aluminum welding rods. find at any welding supply shop.

          Same driven elements I used when building my 44 el cross yagi 5 years ago for ao-13/10
has given me no problems since building. the antenna has appox 18db gain and about 22db f/b
1.2-1 swr across most of the 440 band , the requirements (which took a year to achieve) for this
yagi were #1 high gain, #2 wide beamwidth (23°) #3 wide bandwith. Using the T-match driven elements
gave me the extra edge to accomplish the goals.

Jim Doyle
kd4hur
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« Reply #2 on: January 10, 2001, 07:48:20 PM »

try www.cebik.com

retired professor has lots of info
plain english easy to understand.

73 walt
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N1GMV
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Posts: 175




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« Reply #3 on: February 17, 2001, 07:07:37 PM »

Can find a number of information, drawings and measurements for all sorts of vhf and uhf antennas at
http://www.vhfonline.com/Articles/Antenna_Designs/antenna_designs.html

73
John, N1GMV
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