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Indoor Aerials The use of indoor or set top aerials is not recommended because they invariably give inferior results to those obtainable by even the simplest external aerial. In particular loft mounted aerials, apart from suffering a considerable loss in signal due to the roof material, can frequently give rise to impaired pictures caused by the presence of reflected signals from objects within the loft. This can be particularly troublesome for Teletext reception. Loft aerials can also pick up mains borne interference from domestic wiring.
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