What is the best 2m 70cm base antenna? 10 Best Mobile 2m 70cm Antennas
How do you make a VHF antenna?
What is NMO mount?
A popular type of antenna mount is called an “NMO” which stands for new Motorola. NMO mounts are devised to have a standard threaded connector where you screw on the antenna of choice to the mount of choice. The NMO mount itself connects to the antenna and provides the antenna cable as well.
How do you make an antenna collinear?
Will a 2 meter antenna work on 70 cm?
Some 5/8 2m antennas work great on 6m. But, they generally don't work on 70cm. However, the only real way to know is to try it.
Related faq for What Is The Best 2m 70cm Base Antenna?
How do I build a 2 meter vertical antenna?
How does a Slim Jim antenna work?
SLIM JIM ANTENNA PROJECT. The Slim Jim is a vertically polarized omnidirectional end-fed antenna having considerable "gain" and this is concentrated almost parallel to ground toward the horizon rather than skyward making it more efficient than a ground plane type antenna by about 50 percent better.
How long should a 2m antenna be?
Similarly, the ideal 2m antenna for an HT would be approximately 0.5m with you holding the radio for the other half of the antenna, although you can also get a 1m antenna ("half wave") that will work somewhat better, as this is an end fed dipole instead of a monopole, and doesn't rely on you holding the radio to make
What is VHF UHF antenna?
VHF antennas and UHF antennas use very high frequency (VHF) and ultra-high frequency (UHF) signals for two-way radio, public safety, and commercial communications. VHF is the range of radio frequency (RF) signals from 30 to 300 MHz. UHF is the range between 300 MHz and 3 GHz.
Do I need an antenna for VHF?
VHF antennas are a crucial part of your VHF installation. The main purpose of a VHF antenna is to provide a radiator for the power that the transmitter in the radio produces and to radiate this energy in the correct direction.
How long should a VHF antenna be?
Usually a 6 dB antenna is recommended for boats over 24 feet and a 9 dB antenna is recommended for boats over 32 feet. Longer antennas generally have higher dB ratings but check the technical specifications of the antenna to be sure. Additionally, height is always an important factor.
What is the length of VHF aerial?
Another commonly seen VHF antenna is about 8 feet long and usually mounted on the stern rail; it has more gain than the shorter masthead antenna but is also more directional (i.e. one loses signal strength when heeled over).
What size hole for NMO mount?
The standard Motorola NMO mount requires a 3/4" HOLE in the metal car body for attachment and coax clearance.
Does an NMO antenna need to be grounded?
Remember..it only counts as a ground plane if you have a good electrical connection between the shield of your coax and the hood at the base of the antenna (one of several reasons to use NMO over mag mounts). 1/2 wave antennas fed in the center (a dipole) do not require a ground plane.
How do you make a coaxial dipole antenna?
How does a collinear antenna work?
In telecommunications, when two or more dipole antennas are vertically stacked in such a way that their corresponding elements are parallel and collinear with each other, it is called a collinear antenna array. The antennas are linked in such a way that the radiating dipoles sum up all radiation intensities.
Will a 2 meter antenna work on 440?
The 2 meter 1/4 wave will about a 3/4 wave(?) on 440 so it should work fine. Do you have a VHF/UHF SWR meter? It's an invaluable tool to have when you're working on your antenna systems. Check the antenna SWR at 2 meters and then at 440.
How do you make a ground airplane CB antenna?
What is a 5'8 wave antenna?
A 5/8 wave antenna will have a slightly lower angle of radiation and slightly more gain than a 1/4 wave, considering the ground plane and height above ground are the same for both. With that said, antennas are reciprocal and whatever pattern it has on transmit it will have on receive.
How big does a ground plane need to be?
Ground plane should be 1.10 to 1.25 times the patch or 0.8 times the wavelength as per the literature survey.
How do you make a 2m Yagi antenna?
What is the gain of a Slim Jim antenna?
Slim Jim antennas have no performance advantage over the conventional J-pole antenna. The approximate gain in the H-plane of the Slim Jim is from 1.5 to 2.6 dBi (-0.6 dBd to 0.5 dBd).
How far can you talk on 2 meters?
On VHF frequencies such as 2-meters, antenna height greatly influences how far one can talk. Typical reliable repeater range is about 25 miles (40 km). Some repeaters in unusually high locations, such as skyscrapers or mountain tops, can be usable as far out as 75 miles (121 km).
How long is a half wave 2 meter antenna?
Other than that, this antenna acts just like the classic center-fed dipole. Again, because it is a half-wave antenna, it does not need a ground plane. Fully extended, the antenna is 42 inches long but it collapses down for storage (Figure 2).
Can I use a CB antenna for 2 meter?
It's a 5/8 wave all stainless steel base loaded whip antenna with a threaded 3/8X24 base which is the same as most CB antenna's. Its 49" long and can handle 100 wattts and designed for 2 meter.
Can I use my old dish as an antenna?
To convert your old satellite dish to an HDTV antenna, you'll need a specific type of antenna. This type of antenna receives free, over-the-air (OTA) broadcasts in high-def. The number of OTA HD channels you receive depends on your area, but using your dish to grab more signal can greatly increase the antenna's range.
Can I use my metal roof as a TV antenna?
Yes, practically anything made of metal can be used as an antenna in some way. However, unless something is designed to be an antenna it will work so poorly that a “real” antenna won't be affected by it at all.
Can I use my phone as an antenna for my TV?
Now you can download Antenna Point on your Android smartphone or tablet. No matter what device you have, you can benefit from Antenna Point! See how many channels are available in your area, and which direction to aim your TV antenna for the best reception! Get the Antenna Point app on the App Store or Google Play.
Is VHF better than UHF?
VHF has smaller frequencies which means interference with other radios is common. UHF, on the other hand, is an all-around better signal for long distance communication. UHF is better when using radios for indoor use like buildings or around cities.
Do I need a VHF or UHF antenna?
To receive DTV signals from all stations in the area, your antenna needs to be able to receive both VHF channels (channels 2-13) and UHF channels (channels 14-36). Generally, outdoor antennas will get better reception than indoor antennas and are strongly recommended for the most reliable reception.
Is HI V the same as VHF?
VHF. TV channels are split into three different bands, UHF, HI-V (High VHF), or LO-V (Low VHF). The majority of indoor TV antennas are designed to pick up UHF channels.
Which VHF antenna is best?
Best Marine VHF Antennas
|Best Marine VHF Antennas||Rating|
|1. Shakespeare 5226-XT 8' Galaxy Antenna||99%|
|2. Shakespeare 5101 Centennial White 8' VHF Marine Antenna||96%|
|3. Tram 1607-HC 46-Inch VHF Marine Antenna||93%|
|4. Shakespeare 5104 4' Centennial VHF Antenna||89%|