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Masthead TV Amplifier

Masthead Amplifier

Masthead Amplifier - 13dB Gain

Masthead TV Amplifier

Labgear KIT125V

  • 4G filter reduces interference
  • Variable gain (13 to 25dB)
  • Low noise <1.7dB
  • Easy fit with F connectors
  • Power supply included
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The Labgear KIT125V masthead TV amplifier is the best way to improve TV reception in poor reception areas, where a roof-mounted high gain TV aerial has failed to provide reliable Freeview reception.

Labgear's range of professional masthead amplifiers help to maximise aerial performance, by reducing the effect of coaxial cable feeder losses from the aerial to the TV. For this reason, a masthead signal booster will usually outperform one fitted behind the TV.

For best results, the masthead amp must be fitted close to the aerial, at the base of the TV mast.

The Labgear KIT125V benefits from being fully screened, to help prevent impulse interference pickup from house wiring. Importantly, it also includes 4G filters to eliminate picture breakup from nearby 4G phone masts. In addition, it offers variable gain to optimise performance.

Masthead Amplifier Benefits & Limitations

A masthead amplifier boosts the signal at the aerial where it is at its strongest, making it much more effective than an indoor TV signal booster fitted behind the TV.

Single output masthead amplifiers like the Labgear KIT125V receive their power up the coaxial cable from the supplied power supply unit, which is normally located near the TV. No additional cables are needed as the existing TV feeder can be used. The power supply provides 9-12V DC for the masthead amp and costs a few pounds a year to run in electricity.

It's worth pointing out that fitting a masthead TV amplifier will never be a substitute for a professionally installed outdoor TV aerial. Installing a masthead amp on a poor indoor aerial will give inferior results, which will never match the results of using a high gain TV aerial on the roof.

How to Install and Adjust Gain Control

To install the Labgear KIT125V, turn off your TV at the mains and disconnect the TV aerial. The first part of the installation is done at the aerial.

To start, cut the coaxial cable one to two metres from the TV aerial and connect your aerial to the amplifier 'In' connections and your TV to the amplifier 'OUT1' connector. You'll need some screw on F-type connectors to make the connections. Then securely close the amplifier's waterproof plastic cover and clamp it to the aerial mast.

See our step-by-step guide how to fit the f-connectors, if you are unsure how to fit the connectors to the coaxial cable.

The Labgear KIT125V masthead amplifier has a variable gain control to cater for different aerial signal levels. Ideally the masthead amplifier gain should be kept as low as possible (to 13dB) so as to just offset the coaxial cable loss. Too much gain can lead to picture breakup and exacerbate interference problems.

To install the amplifier, start with the gain control set to minimum (fully counter-clockwise) which provides 13dB of signal amplification. Then observe the 'signal quality' of the weakest Freeview channel/s on your TV. These will normally be ITV2+1, ITV4 or Sky News. The procedure for accessing the signal quality menu on your TV or set top box will be described in the product's instruction manual.

To complete installation, adjust the KIT125V gain control screw slowly clockwise (from its fully counter-clockwise position) for best signal quality, keeping the setting as low as possible. In particular, don't increase the gain if no further improvement in Freeview signal quality is achieved. Please ignore any 'signal strength' reading alongside signal quality, as this can be misleading.

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