How does a sloper antenna work?
The classic sloper antenna is a top-fed 1/4 wave vertical antenna sloping down and away from a tower. The sloper’s feed point is anchored high above ground near the top of the tower on which sits a grounded HF yagi beam antenna.
What is the best antenna for 80 meters?
W5GI Mystery Antenna is a multi-band wire antenna that performs exceptionally well even though it confounds antenna modeling software. This antenna covers 80 to 6 meters with low feed point impedance and will work with most radios, with or without an antenna tuner.
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. as a Sloper or buying one of these Pre-Make Slopers.
How long is an 80m 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.
How do you feed an inverted L antenna?
The best way to feed an inverted L for multiband use is with an auto antenna tuner at the base with the base being on the ground with lots of ground radials or a ground screen. The inverted L types I most often see are between 75 and 100ft long with about 25ft of vertical height and the rest horizontal.
Are dipole antennas any good?
Dipoles rank among the easiest antennas to build, construct or erect for HF amateur radio bands. Commonly used on bands like 80 meters, 40 meters, 20 meters, 15 meters, and 10 meters, dipoles are very useful and can perform excellently well if erected at a high elevation.
Is an inverted V antenna directional?
The radiation pattern of inverted V-antenna is uni-directional pattern, as no standing waves are formed here.
How long does it take to counterpoise an end fed 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)….Wire Lengths for Various Band Combinations.
| Group | USA Bands |
|---|---|
| d | 80-40-30-20-17-15-12-10 |
| e | 160-80-40-30-20-17-15-12-10 |
| f | 160-80-60-40-30-20-17-15-12-10-6 |
Does a long wire antenna need to be grounded?
(A random-wire antenna needs a good ground regardless of how much power you’re running.) A counterpoise is simply a long, insulated wire that attaches to the ground connection on your antenna tuner. The best counterpoise is 1/4-wavelength at the lowest frequency you intend to use.
How big is a w8amz reduced half Sloper antenna?
The main wire element runs towards the ground on a angle as sharp as 45 degree. 70’ of wire is included for this and will need to be trimmed for best SWR, usually around 68 feet. After extensive testing, the power rating on the W8AMZ 80m Reduced Half Sloper antenna has been increased to 1 KW SSB!
How tall does a reduced half Sloper antenna need to be?
As stated before, half the entire band is below 2.1:1 or less without a tuner. The Reduced Half Sloper requires being mounted on a tower or hung from a tree at or about 40’-45’ up. When hanging from a tree it will be necessary to run a wire down to a ground rod.
What does an 80m endfed wire antenna do?
80m Endfed Wire Antenna. An End Fed Half Wave Length Antenna is a variation of the much more common half wave length dipole antenna. When an antenna that is one half wave length long has RF energy applied to it at its resonant frequency a standing wave develops on it.
Can A sloper antenna be omitted from a multi band radio?
Multi-band sloper antenna with counterpoise (drawing not to scale) The antenna wire for the 15 meter band (21 MHz) can be omitted because the base antenna on 40 meters (7 MHz) will cover it on its third harmonic.
