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aurel

Old yagi-corner TV UHF antenna

Hi Admin and others !

As i said in PM i have question.

I have one old broken TV UHF yagi-corner antenna , and  what is left from antenna is

5 directors are OK . - bowtie shaped

half of  feed Point dipole  bowtie shaped

aluminum pipe as element holder with original holes.

I don't have reflector..

this is how original looks:

YagiCorner.png

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On the image ..is ordinary folded dipole as active element but i have on this one ith same shape as directors.

so my questions should be :

1 . can i use or made something else (aluminum wire mesh ) or another bowtie shape as Reflector?

2. because i have only one side of active element ...is it better to build another one bowtie shaped 

or to build one like is on image above?

thanks...  

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,,,why do not you make a bowtie dipole as the directors...???

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I am not sure that i understand your answer.

Do you mean something like panel antenna with bowtie elements instead of rebuild this small yagi?

YagiBow2.png

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,,,yah...!!!

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Ok

I mut explain why I ask..

as far as i remember when i use this type of antenna ii don't get solid results

then i become pissed off and cut aluminum thin and build yagi with 15 directors using 

folded dipol shape for all directors and of course with proper reflector

and all that time this antenna work excellent.

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,,,good, then greetings...!!!

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,,,hi buddy...!!!

,,,can you give the dimensions to a director....???

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of course 

quick measuring from image

BOWTIE_ELEMENT.png

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ahh i see ...shape is little bit tricky..right

i do my best with small plastic measuring triangle

and here is .

For testing i will put it again on old holder to try it as yagi ...

complete.png

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,,,thank you but is missing a dimension...!!!

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Posted (edited)

ahh sorry missing dim is 63 mm

complete.png

Edited by aurel

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,,,thanks...!!!

I will try to make a simulation for your antenna but tell me the frequency domain...!!!

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It is suppose to be standard UHF antenna for 21-69 chanels 

so i think from 470-860Mhz ..right?

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,,,good, and the dimensions of the reflector, which are .. ??

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I dont know because i dont have it...

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,,,and these would be the results...

X-Yagi_01.jpg

X-Yagi_02.jpg

X-Yagi_03.jpg

X-Yagi_04.jpg

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Thank you very much for simulation !!

But i don't understand what kind of dipol is that ????

looks like -E shape ???

what is that?

I have mateials for 5 directors bowtie shape

and for one bowtie "dipole" so probably results should be little bit better maybe 12dB gain

anyway even on your way i think that should work.

currently i cannot mount antenna on foof because of very bad weather here.

 

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,,,so your antenna should have been shown...!!!

17.jpg

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Yes ..that was the original..!

 

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