-
Cheers and @gbj_tester Will have a look at what other people on the street have.
The loft is boarded out and used for storage so would prefer not to lose too much space to an aerial. I guess I could try and squeeze it under the eaves or the secondary loft where there aren't any boards but access is more awkward and I might need to extend the wiring.
The wiring also distributes the signal across half a dozen rooms which I assume (no idea if it is the case) degrades the signal.
aggi-
The wiring also distributes the signal across half a dozen rooms which I assume (no idea if it is the case) degrades the signal
You lose amplitude (3dB in a "physics problem", more like 3.5dB in a practical circuit) every time you split the signal, which is why splitter/amplifier (aka distribution amplifier) is still a thing. Six outlets from one aerial needs three passive splitter stages on some outlets, which is -10.5dB. Whether that's a problem is a matter for practical experimentation
gbj_tester
Depends on what if anything is between you and the transmitter and what your roof is made of but if the aerial is in the loft it will need to be bigger than one outside to account for the attenuation so as a starter look at how big the aerials of your neighbours are (count the elements to start with) and assume you need at least that big. Or maybe an amplifier but they can be a bit of a dark art.
Also look at where your neighbours aerials are pointing. Eg in Crouch End they tend to point at Ally Pally as there is a hill in the way for Crystal Palace. Based on your table you want a group A or a wideband aerial and to mount it horizontally. Get the biggest thing that will fit in the loft.