FM Yagi Antenna Plans 88-100 Mhz

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ACDC
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FM Yagi Antenna Plans 88-100 Mhz

Post by ACDC » Sun Nov 21, 2004 6:26 am

Anyone have plans or websites for a simple 3 element yagi antenna that is fed directly from
coax cable? It will be attached to a Ramsey kit
FM transmitter.

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Re: FM Yagi Antenna Plans 88-100 Mhz

Post by jwax » Sun Nov 21, 2004 6:37 am

Richard- Best homebrew source of info on antennas are ham operators! Try this book-
http://www.remote.arrl.org/catalog/?item=9465
John

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Re: FM Yagi Antenna Plans 88-100 Mhz

Post by ad5mb » Sun Nov 21, 2004 7:13 am

Your public library probably has many copies of the ARRL handbook, other ham books.<p>Check out the links in my Backflip:
( that will make more sense when you get there )<p>http://www.backflip.com/members/kd5kfl/11979292/sort=0/

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Re: FM Yagi Antenna Plans 88-100 Mhz

Post by Dean Huster » Sun Nov 21, 2004 5:05 pm

A low-end TV antenna will probably work well and be cheaper in the long run than making one and will likely work better. The biggest hassle in rolling your own is finding aluminum tubing. In that light, I'd probably use copper tubing anyway since it's easier to find. It just isn't as strong and rigid, but at least you can solder to the stuff!<p>Dean
Dean Huster, Electronics Curmudgeon
Contributing Editor emeritus, "Q & A", of the former "Poptronics" magazine (formerly "Popular Electronics" and "Electronics Now" magazines).

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Re: FM Yagi Antenna Plans 88-100 Mhz

Post by Edd » Mon Nov 22, 2004 2:44 am

In addition to the ARRL antenna handbook, suggested , also check out
these sites for a confluence of thoughts on the mechanical aspect of the
antennas construction.
Cutting/tuning to the lower end of the band will be more desirable, as
compared to the decreased performance experienced on low band trying
to use an antenna cut to hi band specs.
This being in a variable/multiple frequency
utilization, however, if you are not going to be frequency hopping
and remain on a sole frequency, cut to that specific frequency. <p>http://radio.meteor.free.fr/us/yagi_fm.html <p>http://geocities.com/zbtaz <p>http://members.shaw.ca/weskyscan/3ElementYagi.htm <p>73's de Edd
[email protected] .........(Interstellar~~~~Warp~~~Speed)
[email protected].........(Firewalled-Spam*Cookies*Crumbs)
;) ;)<p>[ November 22, 2004: Message edited by: Edd Whatley ]</p>

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Re: FM Yagi Antenna Plans 88-100 Mhz

Post by ACDC » Mon Nov 22, 2004 5:07 am

Thanks to everyone for your assistance.
Two of Ed's links were exactly what I wanted
with detail construction dimensions.

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Re: FM Yagi Antenna Plans 88-100 Mhz

Post by Mike6158 » Mon Nov 22, 2004 6:37 am

Just a thought on using copper tubing: If you use the hardware store rolled variety you can make it a little (not much) more rigid by stretching it. Usually 6" or so of stretch on a 50' roll doesn't reduce the diameter by much. <p>Back in the day :D I used to be an instrument fitter. Every now and then a customer would spec copper tubing for the air supply lines. Stretching rolls of tubing was cheaper than buying hard drawn copper and it worked just as well.<p>Copper is going to sag. No two ways about it. Al is a much better choice.
"If the nucleus of a sodium atom were the size of a golf ball, the outermost electrons would lie 2 miles away. Atoms, like galaxies, are cathedrals of cavernous space. Matter is energy."

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