Home wideband aerial - Triax 52
The Triax Unix 52-W is a popular wideband TV aerial suitable for use in all UK regions which require a Group W or Group C/D aerial. The Triax 52W meets the coveted CAI Standard 2 for outstanding performance and is cheap to buy online from Amazon. It's ideal as an indoor Freeview aerial in a loft or roof mount for best results on a wall bracket or chimney mount. The aerial should always be fed with high quality coaxial cable.
A wideband TV aerial like the Triax 52-W is designed to receive all available TV channels (Ch21 - 68) with consistent performance and can be used for both Freeview DVB-T and analogue TV reception (where still available).
The Unix 52 is considered to be amongst the best TV aerial choices with high gain to improve Freeview reception in poor signal areas. It suits locations with nearby obstructions like hills and buildings result in a weak digital TV signal.
The Triax 52 aerial gets its name from its 52 active elements which help maximise gain, whilst keeping the boom length (at 1.2 metres) short enough for indoor Freeview aerial use.
A wideband aerial is required for reliable Freeview reception in many areas of the UK and in some areas the aerial requirements change at digital switchover (DSO) when analogue TV services are ceased.
To check the type of TV aerial required at your location enter your postcode at Digital UK. Then choose the UK transmitter which serves your area for TV aerial recommendations.
Important Note: It's worth mentioning that wideband aerials are not the best choice for all UK regions. For example, for London Crystal Palace reception a high gain Group A aerial like the Blake DMX10A Aerial for A Group Frequencies (CAI Standard 1) provides significantly more gain at lower UHF channels (Ch21 - 37) that the Crystal Place Transmitter uses (see gain graphs below for details).
In a similar vain, a Group B aerial is optimised for UHF channels 37 - 53 and should be used (instead of a wideband aerial) where Freeview multiplexes are transmitted within this range of frequencies.
See Freeview aerial requirements for information about the types of aerial needed in your UK region.
The physical dimensions, specification and gain characteristics (in dBi) of the Triax Unix 52 and larger Triax Unix 100 aerials are given below. Note that the aerial is also available tuned for Group A, Group B and C/D.
The Triax Unix 100 is too large to be used as an indoor Freeview aerial (loft mounted) at 2.2 metres long!
The gain characteristics of each Triax Unix 52 aerial are shown in the graphs below. The longer bottom graph relates to the wideband aerial (Unix 52W). This demonstrates that the Triax Group A aerial offers 2.6dB more signal at Ch21 than its wideband aerial counterpart. This equates nearly to a doubling of the received signal when using the Triax Unix 52A and is a very good reason why wideband aerials should not be used in areas served by a UK transmitter occupying Group A channels.