What bands go with fan dipole?
The 3 element fan dipole works very well at covering all the bands 80-6 meters, while using a tuner on the non-resonant bands. This antenna will be custom made for you.
Do I need a balun for a fan dipole?
Use a balun: As the dipoles are balanced and coaxial feeder which is normally used to feed the antenna is unbalanced, it is necessary to ensure that there is a proper balanced to unbalanced transition – a balun.
How do you make a fan dipole?
Your your half wavelength here total length for whichever band you want to use so 468 divided by your frequency. And that will give you the length of each dipole.
How do you calculate dipole length?
When determining how long to make each leg of a Dipole antenna, dividing the frequency in MHz into 468 will give the overall length. To find the half wave, divide that number by two. This will give you the length of each leg of the antenna.
How long is a 20m dipole antenna?
Read more about . . . . Dipole Length Calculations.
| Approximate Lengths for HF Ham Band Dipole Antennas | ||
|---|---|---|
| Band (MHz) | Length (Feet) | Length (metres) |
| 7.0 MHz (40 metres) | 68.5 | 21.1 |
| 10.1 (30 metres) | 47.5 | 14.7 |
| 14.00 (20 metres) | 34.3 | 10.6 |
What is the best wire antenna for HF?
The most popular HF antenna for hams with trees to use as antenna supports is the dipole.
- Five Bands, No Tuner by G0FAH.
- The Off-Center-Fed Dipole Revisited: A Broadband, Multiband Antenna.
- Broad-Band 80-Meter Antenna.
- A Simple Broadband Dipole For 80 Meters.
- The G5RV Multiband Antenna …
- K8SYL’s 75 and 10-Meter Dipole.
Why use a balun on a dipole?
BalUn means: Balanced to Unbalanced. This enables us to adapt an unbalanced fed system (coaxial cable) to a balanced antenna system (dipole antenna). The main reason for using a BalUn is to ensure that the coaxial cable does not become part of the antenna system and therefore radiates with it.
Why does a dipole need a balun?
Consideration of a wire dipole without a balun
The braided wire is different from the core wire, so the amount of noise is obviously worse than on the core wire, and the physical shape is also different from the core wire.
How high should a dipole be off the ground?
For best results, dipoles should be at least 1/2 wavelength above ground level. For the lower bands, especially 160-40 meters, this can become impractical–place your dipole as high as your situation allows.
How long is a 40 meter dipole?
How long is a 2 meter dipole?
The top section of the vertical consists of a 3/8-inch rod 19.5 inches long, with the bottom section also consisting of a 3/8-inch rod 19.5 inches long. SWR is fairly flat across the 2-meter band showing 1.5:1 at 144 Mhz and 1.4:1 at 148 Mhz.
How long is a 30 meter dipole?
approximately 14.1 meters
Total length approximately 14.1 meters.
How high should a 20m dipole be?
There is a sweet spot height at about 60% of the wavelength of the target frequency that maximizes the performance of a dipole. For good gain in two directions to the broadside of the wire, place each dipole at a height of 60% of the target frequency wavelength.
Will a 20 meter dipole work on 10 meters?
A resonant 20 meter monoband Yagi will not work on 10 meters.
How high should my dipole be?
Recommendation. For best results, dipoles should be at least 1/2 wavelength above ground level. For the lower bands, especially 160-40 meters, this can become impractical–place your dipole as high as your situation allows.
Is stainless steel wire good for antennas?
The ever-popular wire of choice for many commercial and amateur HF antennas, stainless steel, has an even higher resistivity. Looking only at these passive resistance tables, one could conclude that using any conductor other than copper would be a poor choice.
Is a balun necessary?
Baluns are an essential element in many antenna systems. They enable a balanced antenna or feeder to be transitioned correctly to an unbalanced one like coax that can easily be routed through a building, etc to where it is needed.
What type of balun is used for dipoles?
The best balun for the Windom or Off-Center Fed Dipole is a 4:1 ratio current balun.
Does a balun reduce noise?
Whilst a balun is usually associated with reduced unwanted transmission line radiation (eg. from the feedline and power cord), a balun can also help minimise unwanted noise picked up by your feedline.
What kind of balun is used for dipoles?
What angle should a dipole antenna be?
90°
Angle between dipole legs: The angle between the sloping wires must be at least 90° and preferably 120° or more. This angle dictates the centre support height as well as the length of ground needed to accommodate the antenna. Angle between dipole legs should be at least 90° and preferably around 120°.
How high does a 20 meter dipole need to be?
How long is a 2 meter dipole antenna?
The top section of the vertical consists of a 3/8-inch rod 19.5 inches long, with the bottom section also consisting of a 3/8-inch rod 19.5 inches long. SWR is fairly flat across the 2-meter band showing 1.5:1 at 144 Mhz and 1.4:1 at 148 Mhz.
…
| Frequency (mhz) | A (inches) | B&C/D&E (inches) |
|---|---|---|
| 146 mhz | 19-5/16 | 20-3/16 |
How high should a 40m dipole be?
What is the length of a dipole at 2.4 GHz?
We found that the length of the dipole antenna for the 2.4 GHz frequency is 0.35 λ, and the balun length is 0.25λ for the bazooka and 0.2 λ for the 1: 1 balun.