How do you calculate velocity factor?
The velocity is simply the velocity factor times the speed of light in a vacuum v=(VF)c≈(VF)(3×108m/s) v = ( V F ) c ≈ ( V F ) ( 3 × 10 8 m / s ) If a communication cable is two conventional conductors (copper, aluminium), separated by commonly available insulation (polyethylene, nylon, air), and the cable does not …
What is the velocity factor of RG 213?
Cable Velocity Factor and Loss Data (per 100 feet)
| TYPE | VF | LOSS @ 100 MHz |
|---|---|---|
| RG-174 PE (Belden 8216) | 66.0 | 8.4 |
| RG-174 Foam (Belden 7805R) | 73.5 | |
| RG-213/U (Belden 8267) | 66.0 | 1.9 |
| FSJ1-50A | 82.0 | 1.87 |
What is velocity factor in coax?
Coax velocity factor basics This is the speed at which the signal travels in comparison to that of a signal travelling in free space.
Can velocity factor be greater than 1?
Near to earth, we commonly see values for velocity factor at less than unity, but in the medium of free space beyond earth, they are often at or greater than unity.
What is the velocity of wave?
Wave velocity in common usage refers to speed, although, properly, velocity implies both speed and direction. The velocity of a wave is equal to the product of its wavelength and frequency (number of vibrations per second) and is independent of its intensity.
How long should my CB coax be?
We recommend 18 feet of coax even if you don’t need that much. If you use a length that is shorter or longer, you might risk having trouble achieving good SWR readings. Properly store any excess coax in a figure 8, about one foot in length, and bound in the middle- it should look like a long, skinny 8.
How many watts can RG213 handle?
RG213 Coax Cable
| Power Capacity (In watts 104°F, 40°C) | ||
|---|---|---|
| MHz: | 30 | 150 |
| RG-213 | 1800 | 620 |
What is RG178 used for?
The RG178 coax cable and RG316 coax cable can be used in radio frequency communications, data transmission, wireless communication, and direct burial. More specific applications include GPS systems, PDAs, security equipment, mobile phones, broadcast equipment, remote controls, and more.
What is the speed of light underwater?
225,000 kilometers per second
Light travels at approximately 300,000 kilometers per second in a vacuum, which has a refractive index of 1.0, but it slows down to 225,000 kilometers per second in water (refractive index of 1.3; see Figure 2) and 200,000 kilometers per second in glass (refractive index of 1.5).