A TV antenna amplifier (preamplifier) goes as close to the antenna as possible, typically mounted on the mast just below the antenna element, to boost weak signals before cable loss degrades them. For indoor setups or signal splitting, an in-line distribution amplifier is used near the TV, while a power injector (which powers the preamp) plugs into an outlet near the TV and connects to the coax line.
This type of TV amplifier is a small plastic box attached to the lower part of your antenna. It is a device used to boost a TV signal at the TV aerial, where it is at its strongest. It works by absorbing the signal received by the aerial. Then it sends it through the coaxial cable and to the TV, already amplified.
If you're experiencing reception problems, you'll need to get a technician out to diagnose the issue. But if they confirm that a weak signal is the issue, they'll likely recommend a TV amplifier as the solution. An amplifier works to correct weak signals in your antenna.
If you've jumped on the over-the-air TV bandwagon and have installed a digital antenna but feel like there's still room for improvement in the reception, a TV booster might be your best bet. In some cases, even after installing a high-quality antenna, you still might be lacking reliable reception.
Appliances with electrical motors, including ceiling fans, and high-power objects like refrigerators and hair dryers have been known to cause signal interference. Keep your antenna as far from these devices as possible and also try to keep your coaxial cable from running to close to power cables.
An amplifier isn't about getting more channels; it's about getting a stronger, clearer signal for the channels you can already receive, even if they're weak. The main job of an amplifier is to boost the entire signal (both the TV broadcast and any noise) to overcome signal loss.
If your antenna isn't picking up channels, first rescan for them in your TV's settings (ensure it's set to "Air/Antenna," not "Cable"), then check that all connections are tight and cables aren't damaged; finally, reposition the antenna (higher is better) and ensure it's the right type (UHF/VHF) for your area by checking local broadcast tower info. Obstructions like trees or buildings, signal interference, or a faulty amplifier can also be the culprit, requiring adjustments or even a signal booster.
To improve your TV reception, keep your aerial cable away from other electronic devices that may cause interference. If you experience signal problems, switch off nearby devices and see if the reception gets better. Additionally, using shielded coaxial cables can improve signal quality and lessen interference.
How to install the amplifier
1. Connect your UHF aerial downlead to the input on your TV signal booster. 2. If connecting to a digital TV with built in Freeview™ receiver connect one end of a TV aerial flylead to any of the TV signal outputs 1, 2, 3, 4 on your booster and the other end to the ANTENNA IN (ANT IN, UHF IN) coax socket on your TV.
Strategic Antenna Placement Matters
Install your outdoor antenna at the highest possible point (roof, pole, attic) for the strongest reception. If you're using a directional antenna, remember to point it at your carrier's nearest tower for max efficiency.
Outdoor TV antennas are traditionally mounted on a rooftop and have a better line of site to the broadcast towers, with fewer obstructions – trees, buildings, walls, or roofing materials – and they have a distinct advantage over indoor and attic antennas.
Here are some of the most common problems we come across and why it pays to call an expert the first time.
The amplifier should be installed as close to the antenna as possible. It´s most commonly attached to the antenna mast using the included U-bolt clamp. Next run a cable from output of the pre-amp, usually labeled “TV OUT” or something similar.
Anything under 45dB is what's called the Digital Cliff – meaning that the TV Signal is too weak to be converted and you'll receive either pixelation or no picture at all. Therefore if your readings are below 45dB at any TV point a masthead amplifier / booster will be required.
Locate the RCA Output on Your TV: Identify the red and white RCA output jacks on your TV. These are usually labeled as "Audio Out." Connect the RCA Cables: Plug one end of the RCA cables into the corresponding colored output jacks on your TV. Match the red cable to the red jack and the white cable to the white jack.
A television signal amplifier can help improve a weak signal, especially in areas that do not have good television coverage. It is also useful for distributing a signal to many televisions. In contrast, an attenuator can reduce a signal if it is too strong. Both these devices should only be used when necessary.
Most people choose to use a 4-channel amp because they like rear-fill sound in their car and want to retain front-to-rear fade control. Most 4-channel amps can also be used in 3-channel mode – two channels to drive a pair of speakers and the other two bridged together to run a sub.
If possible, place your indoor TV antenna in an attic or a second-story location, preferably by a window. Sometimes objects in the room or roofing materials will interfere with the signals, so it pays to try a few different attic locations.
By attaching tin foil to your antenna, you were, in theory, increasing the reception by extending the antenna. If you were lucky, and the foil happened to mirror incoming radio frequencies, this might have worked in a past case. On the other hand, it was just as likely to mess up your reception for other channels.
Physical obstructions such as buildings, trees, and terrain can block or reflect radio waves, leading to signal loss, distortion, or interference. Just like when there's an accident on the road extending your commute, a physical obstruction can get in the way of a radiofrequency signal.
To find the right TV antenna direction, point it towards your local broadcast towers, using online tools (like mySwitch) or apps to locate them; aim directional antennas precisely, while multi-directional ones are more flexible, and remember to run a channel scan after adjusting for the best signal. You also need to match the antenna's orientation (horizontal/vertical elements) to the signal's polarization for optimal reception, which varies by location.