/diy/ - Do It Yourself

I think that it's terrible, and that you're a terrible person.

>>141047
Sweet. What kind of wire is that?

>>141047
That is ghetto as fuck. I love it.

>>141050
Haters gonna hate. XD

>>141056
It's just some tinned busswire I had lying around, as is everything else except the balun.

>>141066
That's why the pic is called "ghetto antenna". XD
It's just the quick proof-of-concept version to see if OTA signals were strong enough where I live to make dumping cable TV a viable money-saving idea. The version I built on a piece of 1" EMT and bolted to the roof looks more like something you'd actually pay for.

How does it work? Why that particular configuration?

something to do with a mathematical anomaly or a pattern that continues to reappear in nature. i watched something years and years ago about it, but cant remember enough to google it.

>>141077
it has to do with the wavelengths

i work w/ people who work with RF so I understand a little, but can't explain any of it

if you are in the US or a country using the same bandwidth, look up "DIY DTV antenna" for the proper length and layout of the antenna components

>>141172
I need a legit 2.4ghz attenna design for my wireless internet i'm stealing from my neighbors. All the shit on jewtube and such are little kids that don't understand anything.

I suppose I could get my electromagnetics book out from sophomore year and figure it all out.

>>141221
2.4ghz yagi made of paper clips

>>141234
Im more needing ideas for the cable and i dont wanna use a coax one.

>>141221
>2012
>not using ab9il.net

OP, thats a phased array, a pretty good design of antenna, about as powerful as a decent yagi, its only drawback is that its not very directional (you can pick up stations behind your location if they are reasonably strong), of course depending on your circumstances that may be a good thing.

If anyone really wants to know, here's how to make this type of antenna. Note that you can build this with a piece of scrap wood and pieces of scrap wire or wire clothes hanger even, or you can buy decent materials and build one that looks like something you bought, it's up to you how you want to do it.

>>141239
Coax is going to be lower loss than any other type of cable.

>>141262
>not using lmr 400 transmission lines

anyone got one of those infosheets to make one in hand?

>>141303

Your probably better off learning the theory, with such a wide range of signal frequencies/polarisations being used around the world, and within countries or states. What is an awesome aerial somewhere is not even worth attempting to use elsewhere.

Never heard of a bowtie called a phased array, but it could be right if the phase you're talking about is constant rather than log.

Wood is not a great material to use as a frame. It's okay indoors, but if this goes outside....

As long as it gets the channels you want, good for you. If you want more channels, you'll have to get a reflector screen on the back... metal grid with the wires no more than 2" apart from each other.

One more thing... mount it 90* from it's current orientation. TV signals are polarised horizontally.

>>141316

> Never heard of a bowtie called a phased array, but it could be right if the phase you're talking about is constant rather than log.
Never heard of any multi-bay bowtie being called anything other than a phased array, Im assuming he's actually figured the correct spacing and connector lengths of course.

Wood is not a great material to use as a frame. It's okay indoors, but if this goes outside....
> Nothing too bad about wood, aslong as some effort is made to make sure it doesnt rot.

>One more thing... mount it 90* from it's current orientation. TV signals are polarised horizontally.
If you both live where you live.

>>141333
>polarization
Receive signal strength/SNR about the same either way.

>wood
As stated above, this was a "proof of concept" for feasibility of dumping cable TV to save money, thus there was no point in spending any more money than necessary to make a working model -- regardless of the ghetto appearance.

>>141303
http://tvantennaplans.com
These are the plans I used as a basis for what I built.
The attached pic is the "production" version that currently resides on the side of my roof.
It's not perfect, but it's the first antenna I've ever tried to build.

>>141047
>>141516
I have always seen these with reflector plates at the rear. I have a diy one at home built on an old microwave rear panel.

>>142173

Would definately increase the gain.

>>142512
Is that yours, or are you just posting a pic?
If it is yours, care to talk about the reception? Number of channels, clarity of the channels, etc?
Thanks.

>>142348
I get >=85% and ~30dB s/n ratio on all channels in my area without the reflector, including two VHF DTV channels, so why should I screw with something that works fine the way it is?