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Aerial Amplifiers & Splitters

Our range of aerial amplifiers and splitters keeps a television picture steady when one aerial feed has to serve several rooms. Splitting a signal weakens it, so a distribution amplifier makes up the loss, and a 5G filter removes the mobile interference that now affects many aerial installations. Found it cheaper elsewhere? We will match the price.

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Why splitting a signal needs an amplifier

Every time an aerial feed is split, the signal to each outlet is weakened. A two way split costs roughly half the strength, a four way rather more, and on a marginal aerial that is the difference between a clean picture and a screen that breaks up in bad weather. A distribution amplifier boosts the incoming feed before splitting it, so each room receives a usable level. If you only have one television, a splitter alone is fine. Once you have three or four points, an amplifier is usually necessary rather than optional.

Choosing the way count

Match the number of outputs to the number of television points you actually have, and do not buy a much larger unit expecting it to be better. Unused outputs on a distribution amplifier should be terminated rather than left open, since an open leg can reflect signal back down the line. If you plan to add a point later, one spare output is sensible, but eight ways feeding two televisions is worse than a two way unit doing its job properly.

DC pass and powering a masthead amplifier

Some aerials use a masthead amplifier mounted at the aerial itself, powered up the coaxial cable from indoors. For that to work, the distribution amplifier must offer DC pass on at least one output leg, otherwise the power never reaches the masthead unit and the aerial goes dead. Check which leg carries the DC and label it, because connecting the wrong output later is a fault that looks like a failed aerial.

5G and 4G interference filters

Mobile networks now transmit close to the frequencies used by television aerials, and in some areas that causes patchy reception, pixelation or a total loss on certain channels. An in-line 5G or 4G filter removes those frequencies before they reach the amplifier, which often resolves a fault that has appeared for no obvious reason. If reception has deteriorated recently and the aerial itself is sound, a filter is the cheapest thing worth trying.

Fitting and fault finding

Amplify the signal once, close to the aerial feed, rather than chaining several amplifiers, since each stage adds noise as well as level. Use properly screened coaxial cable and well made F-type or coaxial connections, because a poor joint undoes the benefit of the amplifier. If one room is worse than the others, suspect the cable or the wall plate on that leg rather than the amplifier, and swap a known good lead in before replacing anything.

Frequently Asked Questions

Do I need an amplifier or just a splitter?
With one or two television points on a strong signal, a splitter alone is usually enough. Once you split three or four ways, or the signal is marginal, a distribution amplifier makes up the loss and prevents the picture breaking up.

How many ways should I choose?
Match the outputs to your actual television points, allowing perhaps one spare. A much larger unit is not better, and unused outputs should be terminated rather than left open, since an open leg can reflect signal back down the line.

What does DC pass mean?
It allows power to travel up the coaxial cable to a masthead amplifier mounted at the aerial. Without DC pass on the correct output leg, the masthead unit gets no power and the aerial appears dead. Label the leg that carries it.

Why has my reception got worse recently?
Mobile 4G and 5G transmissions sit close to television aerial frequencies and can cause pixelation or loss of certain channels. An in-line filter removes those frequencies and often fixes a fault that appeared for no obvious reason.

Can I use two amplifiers in series?
It is better not to. Each stage adds noise as well as level, so amplify once close to the aerial feed. If one room is poor while others are fine, the cable or wall plate on that leg is the more likely cause.

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