• May 27, 2022

How Does A Sloper Antenna Work?

How does a sloper antenna work?

Is a sloper antenna directional?

it's best reception in the direction of the Bottom-Far-End. Coax Cable to the Feed-Point and Top-End-Feed-Point.

How long is a 160 meter end fed antenna?

In fact, it looks more like an end-fed 1/4 wave 160 meter antenna (130 ft or 39.624 m long) which goes up some 25 feet (7-8 m), then over horizontally, at an average of 25 feet (7-8 m) above ground, to a tree at the far end of my property.

How does a G5RV antenna work?

7 MHz, 40 metres: On 40 metres the G5RV antenna operates using the top section plus nearly 5 metres of the matching section and it operates as a partially folded collinear array with two half waves in phase. Again the antenna presents a reactive load to any transmitter at its input.

How do you feed a long wire antenna?

Related guide for How Does A Sloper Antenna Work?

How long is a 160 meter dipole?

MFJ 1779A 160M Dipole Antennas are 265 ft. long, ultra-high quality center-fed dipoles.

How long is a 80 meter dipole antenna?

Since an 80 meter dipole is approximately 130 feet long, and a 160 meter dipole is approximately 250 feet long, this space reduction can be critical in getting the antenna to fit into our typical backyards. Another often cited reason is that the inverted vee makes a better match to the typical 50 Ohm feed line.

Does a G5RV need a tuner?

The G5RV will require the use of a wide range antenna tuner in the shack. We recommend that the G5RV be positioned at least 35-40 ft. above ground for the proper tuning and operation.

Is a G5RV any good?

The performance is very good across the HF bands and requires little or no tuning. By moving the feedpoint away from the center and adding a 4:1 or 6:1 balun, you can cover a number of HF bands. Although some claim the popular G5RV antenna works well on all bands, 80 through 10 meters, that is not the case.

How good is a G5RV antenna?

This G5RV 102' won't really perform as an 80-meter antenna except in a Marconi configuration. As a dipole, it is very good on 20- and 40-meters depending on installation, and useful on other bands.

What is the best length for a long wire antenna?

A standard recommendation (see QST, March 1936, p. 32, "An Unorthodox Antenna") is an 84' long end fed and a 17' long counterpoise (6.5' for 20m). While these lengths have been shown to work well on many bands, which is helpful if you're in a hurry to get on the air, read up on the topic and experiment.

What is the radiation pattern of a long wire antenna?

Therefore, the radiation pattern of this type of antenna is unidirectional, as waves follow only forward path. Unlike the resonant type of antenna, here the length of the wire is inversely proportional to the frequency.

How high should a long wire antenna be?

Most people using a horizontal wire antenna for SW have it somewhere between 10 and 30ft off the ground based on running it from a 1 or 2 story house to a tree or some other attachment point in the yard.

How is dipole antenna length calculated?

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 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.

Does a dipole need a ground?

A dipole does not need a ground. However, you can connect your station to a DC ground to comply with NEC (National Electrical Code).

What balun do I need for a G5RV?

W8JI Ham Member QRZ Page

The G5RV is one of the most maligned antenas today, with most of the negative comments being wrong. You can and should use a balun at the transition of the coax to the balanced line, but it should be a 1:1 choke or current balun, You absolutely do NOt want a 4:1 balun.

Who invented the G5RV antenna?

Louis Varney (G5RV) invented this antenna in 1946. It is very popular in the United States. The antenna can be erected as horizontal dipole, as sloper, or an inverted-V antenna. With a transmatch, it can operate on all HF amateur radio bands (3.5–30 MHz).

How long is the ladder line on a G5RV?

The length of the ladder line should be close to 1/2 wave on 20m for a true G5RV using a 102 ft. flat-top, such as you are building. The length is important, as it acts as an impedance reflector on 20m, and a transformer on other bands.

How long is a G5RV JR antenna?

Standard G5RV antennas are 31 meters (102 feet) long, excluding feedline and matching section length, and can be used on 80, 40, 20, 15, and 10 meters. A half-length G5RV (51 feet long) can be used on 40, 20, 15, and 10 and is known as the G5RV Junior.

How do you install a G5RV antenna?

Connect a run of coaxial cable to the end of the ladder line. Feed as desired to the location of your transceiver. Connect the other end of the coax to your radio, and turn on the radio. Ensure the ladder line from the centre of the antenna is able to hang vertically for at least 6 metres.

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