58444 发表于 2012-12-26 18:37

发个新天线

本帖最后由 58444 于 2012-12-26 19:05 编辑

http://www.tvantennaplans.com/Build your own HDTV Antenna PlansHere's what you need to get started:
[*]22 inch section of 2x3 or 1x3 board
[*]18 Screws
[*]18 Washers, sized to fit on the screws to clamp down wire
[*]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.
[*]Reflector grid (Mesh like reflective metallic material.) Two 15x9 grill screens work well for a few dollars. (See first video below.)
[*]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:
[*]Drill
[*]Screw driver, or screw bit for drill
[*]Wire cutters
[*]Pliers

Step 1 - Find, Measure and Mark a piece of wood
[*]Find a board similar to a 2x3 or 1x3
[*]Mark lines at the marks pictured below
http://www.tvantennaplans.com/images/antenna-step1.png


Step 2 - Make 8 wire V's out of wire
[*]Cut eight 14" long sections of wire.
[*]Find the center, and bend each wire into two 7" long legs, with a 3" gap. (7" legs with a 3" gap is important!)
http://www.tvantennaplans.com/images/antenna-step2.png


Step 3 - Attach wires to board
[*]Attach the "V" wires the to board using screws and washers, as shown in the image.
[*]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.
http://www.tvantennaplans.com/images/antenna-step3.png


Step 4 - Attach Reflector
[*]Attach the Reflectors to the back using screws. The Reflectors must not touch the "V" wires.
http://www.tvantennaplans.com/images/antenna-step4.png


Step 5 - Attach the Balun
[*]Attach the Balun to the two center sections of wire. Make sure the two connections do not touch each other.
http://www.tvantennaplans.com/images/antenna-step5.png


Step 6 - You're Done! Test your antenna!
[*]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: http://www.simplymission.com/furniture/files/u1/IMG_2114_0_0.jpg





这个天线比例缩放:lol








这个天线 的youtube   
http://www.youtube.com/watch?v=JU5mC8tdUd8&list=UUqrUE5x2iM_lKQqwaH09cnw&index=10

王人禾 发表于 2012-12-26 18:50

专利产品，仿冒不究。。。

liuchang980 发表于 2012-12-26 18:51

上个测评图吧         

58444 发表于 2012-12-26 18:51

-不是我的

Eilling 发表于 2012-12-26 18:53

LZ号称多少DB

我爱白丝 发表于 2012-12-26 18:54

牛B 开眼了呀

EWSA2012 发表于 2012-12-26 18:55

蜈蚣太子:lol

tzm213294 发表于 2012-12-26 18:58

好大的蜈蚣

1qq 发表于 2012-12-26 18:58

牛B 开眼了;P

shilla 发表于 2012-12-26 19:04

这…………要是我把这个挂外面估计会有大把的人咨询的

892733324 发表于 2012-12-26 19:08

;P;P;P;P;P;P;P;P;P;P

lukia 发表于 2012-12-26 19:13

难看了点，不知道信号好不好！
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