The Wolsey WFAV25 masthead TV amplifier is the best way to improve TV reception in poor reception areas, where fitting a high gain TV aerial on the roof has failed to provide reliable Freeview reception.
The real advantage of professional masthead amplifiers is that they help to maximise aerial performance by reducing the effect of coaxial cable feeder losses from the aerial to the TV. A low noise 4 output masthead amplifier is also available to feed up to four TV's or set top boxes in different rooms of your home.
The masthead signal booster is usually fitted to the base of the TV mast and is fully screened to help prevent interference pickup. The Wolsey WFAV25 (featured) also has variable gain control to further optimise reception allowing gain adjustment from 12 - 25dB.
The 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 Wolsey WFAV25 receive their power up the coaxial cable from a small power supply unit (PSU) which is normally located near the TV, so 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.
To install the Wolsey WFAV25, turn off your TV at the mains and disconnect the TV aerial. Cut the TV coaxial cable one to two metres from the TV aerial and connect the feeder from your aerial to the amplifier 'input' connections and the feeder from your TV to the amplifier 'output' terminals. Make sure that the cable's outer copper braid does not touch the coaxial cable centre core and then connect both the braid and the centre core to their corresponding terminals at the masthead amplifier.
The Wolsey WFAV25 has a variable gain control to cater for different aerial signal levels. Ideally the masthead amplifier gain should be kept as low as possible so as to just offset the coaxial cable loss. Too much gain can lead to picture breakup and lead to interference problems.
To install the Wolsey WFAV25 start with the gain control set to minimum (fully counter-clockwise) which provides 12dB of 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 Wolsey WFAV25 gain control screw slowly clockwise (from its fully counter-clockwise position) for best signal quality, keeping the setting as low as possible if no further improvement in Freeview signal quality is achieved. Ignore any 'signal strength' reading alongside signal quality as this can be misleading.