What is a Coaxial Amplifier?

John Lister

A coaxial amplifier is a device designed to improve the strength of a weak television signal. It may also be necessary to use a coaxial amplifier where a user has split a signal from one antenna to cover multiple television sets. The amplifier should be placed as close to the antenna as possible, preferably at the point where it enters the home.

Coaxial cable is typically used during cable TV installation and for some computer, audio and visual equipment.
Coaxial cable is typically used during cable TV installation and for some computer, audio and visual equipment.

Another situation which might require a coaxial amplifier is where the user has a particularly lengthy cable run between an antenna and a TV set. One example might be somebody who has an antenna on the rooftop of a separate building such as a garage. Using an amplifier can counteract the degradation of the signal which occurs when it is carried over a long run of coaxial cable, which doesn't do a particularly good job of maintaining a signal.

It's important to remember that a coaxial amplifier merely makes the best of the existing situation with the signal. Before resorting to an amplifier, it is worth checking if the problem can be solved by other methods. These include checking the antenna for damage and making sure it is correctly positioned to pick up the strongest possible signal.

It's also possible for a home to be in a location which picks up a signal which is too strong rather than too weak. This can also cause interference, for example by one channel "leaking into" another. The solution to this problem is an attenuator, which reduces the power of the signal without distorting its waveform.

In most cases, a coaxial amplifier is only used for over-the-air signals received through a traditional antenna. In theory, it could also be used for satellite and cable signals. In practice these signals are less likely to vary enough by location to require amplification. There can also be problems using an amplifier on some cable set-ups, as this can limit or remove the ability to send signals in the reverse direction, such as when ordering a pay-per-view event via the remote control.

A coaxial amplifier should not be confused with the features available in a surround sound receiver. This is a device used to produce multi-channel audio for a variety of audio inputs. It does usually include some form of amplifier. It also usually has two types of audio connection, known as coaxial and optical. These terms refer solely to audio, whereas a coaxial amplifier deals with television signals.

You might also Like

Discussion Comments


@runner101 - I could not believe it when a friend of ours stated they did not have a TV! (I know, it is very sad that I could not imagine someone living without a TV).

I had to ask what they did in replace of the typical thirty minutes to two hours a day people watch TV.

We all had a great laugh when they said, "We spend that time watching TV on our computer!"

I thought this was a brilliant idea for people who are the type to just watch the shows that they like and really are not into channel surfing as there are very few shows that you can not find somewhere on the internet.

Also with popular shows, if you can just wait you can rent or buy the full season on DVD and never have to watch a commercial again!


As the rates of cable continue to rise my husband and I went looking for other options for TV service.

I couldn't believe the antennas they have. I had thought that antennas were a thing of the past as I can remember when I was a kid (my parents refused to get cable) constantly adjusting the "rabbit ears" (the local word for antenna) to get a better signal.

Not anymore! If someone wants to forgo cable they may not receive as many channels but the channels will be clear as day with things like antennas and coaxial amplifiers!

Has anyone else thought of forgoing cable with all the new gadgets out for TV?

Post your comments
Forgot password?