Issue with digital TV signal

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We've just moved into a house with numerous aerial points and a couple of them have poor signals with picture breaking up on the odd channel. The signal is relayed through a booster but I'm thinking the aerial is the problem. I can't find the aerial anywhere so wondered if anyone could tell me what the aerial is please before I change it.

20210731_085346.jpg
 
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Why do you think the aerial is the problem if only a couple of points have poor signals? Surely more likely those points or their cables are the problem.

That aerial in your picture is not a TV aerial. Possibly a DAB or PMR aerial, but difficult to say without knowing the dimensions.
 
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So having been back up in the loft it seems that the fm aerial is actually my TV aerial. I'll be changing it imminently.
 
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Called a folded dipole. With aerials there is a trade off, as gain is increased it becomes more directional, so where you are within range of more than one transmitter there is good reason for an omidiectional aerial.
 
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Looks too small for an FM aerial. How long is it top to bottom. An FM aerial is around 5 foot. A DAB aerial half that approx.
 
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