Membuat Antenna HDTV Kloningan ( Beberapa bahan sengaja di dihilangkan atau diganti )
saya mau share hasil eksperimen saya membuat antena TV sendiri, dan saya puas dengan hasilnya, alhasil 95% dari 18 chanel TV yg tertangkap bening semua, kyk nonton dvd aja, hehe...
antena TV yg saya buat pertama ngikut tutorial dari sini http://www.tvantennaplans.com/ ini adalah cloningan antena HDTV (High Definition TV) yg biasa dipakai di USA, tapi bisa juga buat UHF. awalnya saya bingung waktu mencari balun (klo ga salah fungsinya menyeimbangkan impedansi kabel antena dan impedansi tuner TV), tetapi waktu antenanya sudah jadi dan saya coba antena TV saya langsung pasang dan tidak pakai balun (kabel antena TV coaxial yg digunakan yg biasa warna ijo tapi inti dan serabut dari tembaga asli), jreeeeeeng... alhasil channel Tv bening smua, syukur deh ga usah nyari balun lagi, hehe..
ini gambar antena yg saya bikin : 
bahan2 eksperimen :
1. 22 inch kayu ukuran 1x3 inch
2. 10 buah sekrup
3. 112 inch kawat seng diameter 3mm ( untuk 8 buah driven "V" )
4. 2x18 inch kawat tembaga diameter 2mm
5. 20 buah Ring sekrup
6. 16x18 inch kawat ram ( buat reflektornya ), lebih bagus pake ram parabola yg alumunium.
7. Cat (biar kayu tahan air) , saya sih 5x ngecat biar tahan air
8. lem bakar (buat nutupin sambungan sekrup, biar ga karatan)
experimen satu lagi:
kbetulan dirumah ada juga antena nya mandra ( PF g*ceng ), buat TV yg
ditengah rumah, saya modif sdikit ( dengan mencabut PCB dan coil di
dekat driven antena ) dan kabel saya ganti dengan kabel antena TV KIT*NI (kabel inti diameter 1mm lebih, dan serabut dua2nya kyknya dari tembaga yg bagus, bukan promosi.....), ternyata jadi lebih bening dibanding sbelum saya modif antena yg ini .
NB:
-tinggi tiang skitar 7M dan diletakkan diluar rumah
-Letak tiang antena ikut berpengaruh pada kejernihan gambar TV yg ditangkap, karena sinyal UHF bagusnya tidak terhalang apapun supaya sinyal UHF tertangkap maksimal
-pilih kabel coaxial antena TV yg bagus (diameter besar dan dari tembaga asli, bukan tembaga sepuhan), karena makin besar diameter penghantar tembaga maka tahanan dalam penghantar makin kecil sehingga tidak menghambat arus dalam hal ini sinyal UHF.
-dua eksperimen saya diatas kejerihannya imbang, dan saya tidak memakai Booster apapun, dan sama2 bening..
maaf klo ada yg salah, dan mungkin rekan2 solfers lain ada yg mau
http://solfegio.indonesianforum.net/t3896-share-diy-antenna-tv-uhf
How to Make a TV Antenna for HDTV
DIY TV Antenna
TV Antennas do not need to be complicated or expensive. There are some simple yet effective homemade TV Antenna designs that can be built at home with parts you may already have around your house.
Build a HDTV Antenna
One of the most effective "Build Your Own HDTV Antenna" plans is based on a design called the DB4. The DB4 is regarded as one of the better "general use" designs for pulling in HDTV signals in many situations. Most flat screen TV's have a digital tuner for HDTV built in, but if you have an older set you may need a digital converter box to convert a signal from an antenna like this into something the older analog sets can display.
DB4 antennas are available commercially starting around $40 and up, but here I will show you how to build your own for much less than that.
On the right screen, digital TV can be a much different experience than what TV used to be, so set-up your home theater with the best flat screen tv to get the best value from an antenna like this.
Build your own HDTV Antenna Plans
Here's what you need to get started:
1. 22 inch section of 2x3 or 1x3 board
2. 18 Screws
3. 18 Washers, sized to fit on the screws to clamp down wire
4. 15 feet of wire. Roughly 5 feet of copper three conductor house wiring will do fine. Coat-hangers can work if stripped of paint at all connections.
5. Reflector grid (Mesh like reflective metallic material.) Two 15x9 grill screens work well for a few dollars. (See first video below.)
6. One Balun - A thing with a coax plug on one side, two wires with screw holes on the other. These are commonly used to attach old TV's to coax antenna's (or cable.) They are inexpensive (I've seen them in bulk for as little as 30 cents each), and commonly available. My local dollar store carries them!
Tools:
1. Drill
2. Screw driver, or screw bit for drill
3. Wire cutters
4. Pliers
Step 1 - Find, Measure and Mark a piece of wood
1. Find a board similar to a 2x3 or 1x3
2. Mark lines at the marks pictured below
Step 2 - Make 8 wire V's out of wire
1. Cut eight 14" long sections of wire.
2. Find the center, and bend each wire into two 7" long legs, with a 3" gap. (7" legs with a 3" gap is important!)
Step 3 - Attach wires to board
1. Attach the "V" wires the to board using screws and washers, as shown in the image.
2. Zig-Zag the two connection wires down and across the center of the board as shown. It is important that when the wires cross each other, they do not touch.
Step 4 - Attach Reflector
1. Attach the Reflectors to the back using screws. The Reflectors must not touch the "V" wires.
Step 5 - Attach the Balun
1. Attach the Balun to the two center sections of wire. Make sure the two connections do not touch each other.
Step 6 - You're Done! Test your antenna!
1. Attach your antenna to your HDTV using a coax cable, and see how it works!
These plans to ugly for you?
These plans are functional, but some people describe them as ugly...and they'd be right. The same core technical design and base measurements can be used in other ways. Here's one example I made:
Here's the same core design, as a mission style tv antenna.
http://www.tvantennaplans.com/
