144 MHz 4 element yagi - dimensions

[@terrybondy5458]

I think I heard: Spacing from R: * DE 34.5 cm * D1 51 cm * D2 92 cm Full element lengths: * R 105 cm * DE 101 cm * D1 91.5 cm * D2 83 cm Optimized for 144-145 MHz.

[@mannhansen9337]

What are the dimensions for a receive only antenna at 141.5 MHz? Will be used for tracking and locating wild animals.

[@miniwattnetwork8204]

@@mannhansen9337 for receiving signals it will not vary way too much in gain... increase each full length in 1~2cm max

[@ruddyruslie2346]

Yes correctly, loud and clear 5 - 9. 👌

[@berndb.5097]

Hi Peter, thank you, exspecialy for every dimensions in metric :-) 73 Bernd

[@supyrow]

Thanks for this Peter! Great video, very thorough! 73!

[@peterjones3245]

Are those dimensions to the centre of the element rods or the actual gap between them?

[@jeromeGrzelak]

Great build alot of hardware out there 4 the asking kg6mn

[@ChartreuseKitsune]

The Internet Archive has a cached version of W5TX's site from just before Verizon shut down their website hosting. If anyone is interested in the other designs hosted there the link is: web.archive.org/web/20140910064959/mysite.verizon.net/w5tx/

[@vk3ye]

+Chartreuse Kitsune Excellent. Even has the 44 page pdf which I really missed.

[@GreekPreparedness]

While the measurements do not exactly coincide with, this antena resembles IZ2UUf's design of a 50Ohm 4 element yagi www.iz2uuf.net/wp/index.php/2013/04/06/100g-yagi/.

[@stewartrv]

The original site was archived here: web.archive.org/web/20140910064959/mysite.verizon.net/w5tx/ And Google found this if it helps... "Bob Hicks - W5TX. The designs presented here are intended to be direct fed by 50 ohm coaxial lines." www.n5zpr.com/Media/directfedyagi.pdf

[@IvanPassos]

excellent antenna 144mhz DB?

[@krisraps]

Can You PL

[@np4edward]

hello Peter and congrats for another good video, do you have schematics of the yagi with the details. thanks in advance de kp4egm, 73!

[@stusoura77]

Do you need a gamma and what is the db gain from front to back

[@jeromegrzelak8236]

I HAVE A 5 INCH ONE LIKE THE TAPE MEASURE ONE KG6MN

[@argentogoldspier5211]

Peter . Thank-you for sharing your knowledge and explaining things so simply. I know your yagi has not got a folded dipole but may I pick your brain about folded dipoles. I have seen on some VHF antennae and even on VHF TV antennae that sometimes the folded dipole is mounted with one of the longer sides inline with the directors and the other long part hangs down say 6cm lower. This is a common yagi look. But some Yagis the folded dipole does not hang down, the whole thing is level with the directors or you could say lays flat on the boom. The one that is flat with the boom seems to be called a coplanar loop fed array. But what is the advantages and disadvantages of the two ways to mount the folded dipole. I remember the old hills 14 element VHF of the 80's had the laying down folded dipole but now they seemed to of gone back to the hanging down way. Also I have read a folded dipole is a squeezed down quad, so would a quad element be better if making an antenna?

[@vk3ye]

+Argento Goldspier Probably doesn't make much difference. Beams can be made with a quad element instead of a folded dipole - look up 'quagi'

[@argentogoldspier5211]

+vk3ye Thanks Peter. Look forward to more videos from you. Keep up the good work. You have a big following on here.

[@Masterkill45588]

How does the matching network work

[@MarkPentler]

There isn't one. Peter explains that this is a direct feed - the impedance is 50ohm so you direct feed the split driven element with each side of the coax. Peter doesn't mention that this is a split element though here. So I am unsure how you attach the coax

[@mihijousatacosbombachaycor3883]

*TE FALTO DECIR CUANTO MIDE, EL LARGO DEL BOTALON AMIGO!!!!*