DIY make Short-wave antenna

please Click hereto get our dipole antenna

The antenna as long as five meters of glass fiber reinforced plastic rod 4-5, 50 m cable, you can easily self-control,
Ham is the preferred antenna space is limited, we ask everyone to do the right hands.

 

 
自制小巧天线Short-wave antenna
Made with the design drawings:
Inch size is, we convert it yourself.
1 inch = 25.4 mm 1 foot = 12 inches own Forget
For impedance matching description:please Click hereto get our dipole antenna
自制小巧天线Short-wave antenna
 
 
The inventor said he is gamma match antenna, but the majority of home-made with Ham's 1:1 balun.
Another spoke of two oscillator Ham 3-inch gap between the matching is very important.
Using 1:1 balun, in accordance with the low band to high band began to adjust the order, starting with the beginning 14MHz, then 18MHz, 21MHz, 24MHz.
Looked at this antenna, I feel it is relatively easy to do, and the material is relatively cheap, there are unknown at the following advice:
1, the trouble to explain the basket in the text, somewhat vague, do not know.
2, the green box is the size of the wizard from the center line along the rod the size of the fixed point of the amount of it?
3, several bands of the feed point is connected directly together?
4, whether it is in the feed point relative to the center of one side of a cut the wires? (I saw a double-stranded wire, the other photo seems to cut the one, figure point of view is not clear)
1, Approx 3 "GAP (about 3 inch intervals) are not clear about the size of the top one is 5 feet 6 inches, the other two one is 4 feet 10 inches, one is 4 feet 5 inches (in fact you can hook shares Theorem own calculations)
2, is correct.
3, is correct.
4,2 roots are cut, the three inch intervals connected by insulating material.
please Click hereto get our dipole antenna
 
On one: "J" antenna production Next: Automatic Control bedside lamp with telephone

article
· Homemade shortwave antennas
· Short-wave super-regenerative receiver,
· Simple and effective shortwave antenna amplifiers
· Made a strong anti-jamming short-wave receiving antenna
· Homemade shortwave antenna amplifiers
• Four broadcast method of making short-wave antenna
· Part of the short-wave radio bar magnet Specifications
· A simple and effective short-wave antenna amplifier circuit
· SK-219 regenerative shortwave radio
· FM alarm to remind the remaining items
 
 
 
 

Enter your available email

Get this 2KM FM transmitter set

Build your radio station for free

 

1 字段 2 字段 3 字段 4 字段 5 字段 6 字段 7 字段 8 字段 9 字段 10 字段
paypal solution Moneygram Western UnionBank OF China
E-mail:sky@cantonmade.com MSN:balalove2008@hotmail.com Skype:sky198710021 Chat with me
Copyright 2006-2008 Powered By www.Fmuser.org