# Antennas for 10 Meters

## Antennas for 10 Meters

### Antenna: 10 meters, Range: 28 to 29.7 MHz

Good 10 meters antennas are quite easily built using readily available materials. Since 10 meters covers the frequency range of 28 to 29.7 MHz you can use a few simple formulas to compute antenna sizes.

Antennas for 10 meters are among the easiest to make due to their size which is smaller than the rest. In fact, you can easily convert CB radio antennas over to 10 meters with little to no work. Some CB antennas are quite broad-banded so no modifications are necessary to operate them on 10 meters. Creating your own antenna for 10 meters is quite easy to do using the formula for a quarter wave antenna as explained in the next paragraph.

This formula: 234/f can be explained by dividing 234 by the desired frequency in megahertz which will give you the length, in feet, of a 1/4 wave antenna. This formula isn’t exact in that it assumes the radiating element is infinitely small. What this means is if the radiating element was one inch in diameter then the resonant length of the antenna would be a little shorter than the calculated one given by the formula gives you.

Using the formula above you will soon see that an antenna for 10 meters is approximately 8 feet 2 and 7/8 inches in length. This antenna measurement can be used for either a vertical antenna for 10 meters or a horizontal antenna for 10 meters.

Antennas for 10 meters are small and easy to deploy for survivalist needs.

10 meters can be both a fascinating and occasionally challenging band to work. During times of the solar cycle’s greatest sunspot activity 10 meters can be busy because of the many long-distance signals present on the band. The 10 meter band is sometimes referred to as a day-time band meaning it is the most effective during the daylight hours of the radio operator’s current QTH (location). During certain periods of increased sunspot activity (solar activity), “band openings” have been evident from hours before sunset and continue to stay open into the late evening hours.

It would pay for a survivalist to include an antenna for 10 meters. Many current and older CB radios can easily be converted to run on 10 meters.

# Beam Antennas

## Beam Antennas

Beam Antennas.
We have all seen at least one of these antennas around. They are usually on top of a tower or at the very least on the roof of a tall building. Beam antennas need to be a good distance up in the air in order for them to work adequately. A good height for beam antennas is generally 40 feet high but you will see them on top of towers over 100 feet tall. Many times on these larger towers you will see more than one of these beam antennas with each antenna dedicated to a certain frequency. One point of interest with beam antennas is that the smaller the antenna the higher the frequency it is used on.

The use of beam antennas in survival environments is not unheard of but the logistics of the tower, the rotator, and the antenna itself would likely be enough to prevent their use in most survivalist operations. In case you’re wondering, the rotator mentioned earlier is to turn the antenna in the direction of the station you wish to communicate with. By their design a beam antenna’s most powerful signal is heard from the front of it and the best way to block an offending signal is to turn a beam so the side or back of the beam is directed at the offender.

Beam antennas are not all created the same, some are made from aluminum tubing and are called yagi antennas. Another design for beams is that of a quad antenna. This antenna consists a 2 large arms crisscrossed and then a wire connects to the end of each of the arms. This antenna has an excellent reputation in the amateur radio community but it is quite a bit larger than a yagi antenna.

So before you contemplate the use of a beam antenna at your compound or even at your base station you need to total up the costs as well as the work involved in setting up a beam antenna. If you are working portable then you likely will not consider a beam antenna.