Quick Answer: Can I Use 75 Ohm Coax For CB?

What is the difference between 50 ohm and 75 ohm coax cable?

Especially when it comes to 50 Ohm vs 75 Ohm coax cables.

In short, cables are measured by impedance, how much resistance there is to the flow of electrical energy.

The smaller the Ohm, the better the performance.

So a 50 Ohm cable provides much better results than a 75 Ohm cable..

What is the best CB coax?

Best CB Coax Cable ReviewsRoadPro RG-58A/U Coaxial Cable w/Molded PL-259 Connectors. … RoadPro RP-8X18CL 18′ Clear CB Antenna And Cable. … 18′ RG-58A/U Coaxial Cable With Pl-259 Connectors. … CablesOnline RG8x Coax UHF Male to Male 50 ohm Antenna Cable. … Workman RG58A/U COAX CABLE 3 foot Jumper for CB / Ham Radio.More items…•

What is the difference between 75 Ohm and 300 Ohm antenna?

The 300 Ohm is for twin lead, think rabbit ear ribbon wire. The 75 Ohm is typically coax for cable TV, satellite, ect. It has less to do with which is better and more to do with the antenna. The two Ohm connections only refer to the cabling used to attach the antenna to the receiver.

Can you use TV coax for CB?

The cable TV coax its self won’t work as an antenna. It also won’t work well for a feed line to a CB antenna as it is 75ohm cable and CB’s are designed for 50ohm feed line and antenna. Of course you could connect it to the radio, you might hear something, probably not much. Just don’t try to transmit.

Does coax length matter?

When the coax and load are matched to one another (for us, that’s usually a 50 ohm coax and 50 ohm load), and when there is no common-mode current, the coax length makes no difference. If the coax is radiating because there is common mode current on it, then its length matters tremendously.

Is BNC same as coax?

The BNC (Bayonet Neill–Concelman) connector is a miniature quick connect / disconnect radio frequency connector used for coaxial cable. … The 75 ohm connector is dimensionally slightly different from the 50 ohm variant, but the two nevertheless can be made to mate.

Can I use 50 ohm coax for TV?

A good rule of thumb is that any device that functions as a transmitter or transceiver tends to use 50 Ohm Coaxial Cable. This includes devices such as CB/Ham Radios, Broadcast Radio/TV Transmitters, Wi-Fi and Cellular Phone Repeaters and 2-Way Radios (Walkie Talkies). … Our next most popular is RG-174 Coaxial Cable.

Can I use 75 ohm cable instead 50?

3 Answers. Sure, you can use 75 ohm coax instead of 50 ohm. In some cases (such as feeding a dipole), 75 ohm coax may be a better match to the load than 50 ohm. … A 75 ohm load on a transmitter designed for a 50 ohm load is only a 1.5:1 SWR, which isn’t that bad.

Does coax length affect SWR?

Many antennas have a SWR of just over a perfect match like a SWR of 1 to 1.2. This is measured at the antenna itself. With a length of coax the SWR will now show a SWR of say 1 to 1.0 , because of the loss in the coax. And so will the bandwidth change a little.

What is 50 ohm coax used for?

So 50 ohm cables are intended to be used to carry power and voltage, like the output of a transmitter. If you have a small signal, like video, or receive antenna signals, the graph above shows that the lowest loss or attenuation is 75 ohms.

Will a CB work without antenna?

No antenna, no transmitting signal is going out. No antenna while transmitting, you’ll probably need a new radio.

What SWR is too high?

For instance a SWR too high (over 3:1) all over the band can be an indication of a bad part or junction, poor ground or poor location. An SWR too low over the whole band (1:1 for all 40 channels) can indicate a low efficiency antenna or lossy component. Safe operation of your CB should be with an SWR of 2:1 or less.

What is 75 ohm coax used for?

About 75-Ohm Coaxial Cable. They are often pre-wired into businesses and homes. You will find them at the back of your television set. You will find them in the back of your Internet router as well as satellite and cable TV boxes. 75-Ohm coaxial cable is primarily used for audio and video.

Is rg6 a 75 ohm?

An RG-6/U coaxial cable has a characteristic impedance of 75 ohms. The term, RG-6, is generic and is applied to a wide variety of cable designs, which differ from one another in shielding characteristics, center conductor composition, dielectric type and jacket type.

Is satellite cable same as coaxial?

yes you can use this type of coaxial cable, it comes in various colours usually black/white or brown and Usually has model – RG6 or WF100 6mm try to avoid RG 59 or RG 7 because this is very similar but slightly smaller I usually use this just for video and not signal cable as the thicker RG6 coax cable has a larger …

Is a longer CB antenna better?

Choosing the Optimal CB Antenna Length Yes, taller/longer is better for range of distance when it comes to an antenna and the optimal antenna length is 1/4 wavelength. That translates to 102 inches (8.5 feet), too tall to be practical for most mobile applications.

How do I know if my CB antenna is bad?

Testing for a Defective CB AntennaUsing your multimeter, touch one of the probes to the metallic end of the antenna. For fiberglass antennas, this will usually be the tunable tip on the antenna’s end. … Touch the other probe to the metallic threads at the end of the antenna. … As you maintain contact with both probes, measure the circuit’s resistance.

How long should my CB coax be?

18 feetSelect the correct coax length. Many antenna manufacturers somewhat pre-tune the antennas utilizing 18 feet of coax which is why we generally recommend 18 feet of coax even if you don’t think that you need that much.