Should I use radials for the diamond bb7v?
If its mounted above ground like on a roof then at least four tuned radials per band will be beneficial. If its on the ground then tuned radials get detuned and ground losses creep in, so its much better to saturate the area around the antenna with lots of short radials like 20 or 30 radials 20 or 30ft long each.
What is a HF antenna?
The most powerful antennas for the HF bands or any band is the directional antenna, often referred to as the beam antenna. These antennas focus your signal in a particular direction (like a flashlight). Not only do they concentrate your transmitted signal, they allow you to focus your receive pattern as well.
Do vertical antennas need radials?
In fact, you don’t even have to run them underground. But you do need to install as many radials as possible for each band on which the antenna operates. That’s why several antenna manufacturers developed verticals that do not use radials at all. The most efficient of these verticals are actually vertical dipoles.
What is a good HF vertical antenna?
Comet Original GP-3 Dual-Band 146/446 MHz HF Vertical Base Antenna. The GP-3 also has the highest power rating for HF vertical antennas in this range. So, despite supporting a relatively lower power, it will make the most efficient use out of that power. It can handle long QSOs from VHF or UHF radios with no sweat.
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.
What HF frequency is best?
HF users have found that using a frequency that is the MUF times 0.85 gives the best chance for good results. This is called the frequency of optimum transmission (FOT). Usually the FOT is a good choice for HF communications, but not always.
Does a vertical antenna have gain?
Vertical antennas include: Using this antenna, more power is radiated at a low angle of radiation, enabling gain to be obtained in the required plane.
How long should vertical antenna radials be?
Elevated radials should be electrically 0.25l long. Elevated radials should be at least 0.05l above ground and, for safety reasons, not less than 2m high. Two or four elevated radials can perform as well as an extensive ground radial system, although a greater number is likely to work better.
Are HF verticals any good?
Although, Comet HF vertical antenna is the best from our perspective view due to user satisfaction, flexibility, and lower budget for people affordability. Another good choice is Hustler HF antennas, the price is lower than the Super Antenna.
How to choose the best HF vertical antenna?
To find the best hf vertical antenna for your needs, be sure to consider the virtues of each antenna against things like space, accommodations, and any other relevant restrictions. The first step is to decide where you plan to set up your antenna, then choose the perfect antenna for your purposes.
Are there any outdoor conditions for vertical antennas?
One thing about vertical antennas is that they are almost always exposed to outdoor conditions. The unavoidable truth is that these guys are going to face rain, wind, and dust. With this in mind, it helps to be on the lookout for sturdy and heavy-duty builds.
What are the radials on a vertical antenna?
Generally speaking, radials are a helpful component for a vertical antenna. The radials fan out from the antenna’s base. Usually, there are roughly 120 radial units on your vertical antenna system. These encourage the high-frequency capacity of the unit. 01. Comet Original Base Antenna – Great Heavy-Duty Option
Why are vertical dipoles so popular in radio?
The reason for this is that they are, in effect, vertical dipoles and if the end of the antenna is too close to ground, capacitive coupling will detune the antenna. A third class of vertical antenna that is becoming popular is the non-resonant vertical antenna.