On 08/08/2015 10:16, charles wrote:
In article ,
Robin wrote:
DerbyBorn wrote:
Loft would be worse as it would then be faced with the signal being
degraded through the roofing materials.

That seems to me a little too firm given the OP said the aerial is wall
mounted. The loft might then put it higher where the loss from roofing
materials is less than the loss from the leaves etc. Or it may allow a
position to one side of the tree. And it may also be easier (and more
acceptable to anyone with an aesthetic veto) to fit in the loft an
aerial with higher gain.

The higher gain of an aerial would be insignificnat in comparison with
losses through roofing materials. A small mast head amp might well be
needed. But if the aerial in wall mounted, I'd suggest a longer pole. A
good T&K bracket and a 2" pole could give another 10ft in height.


http://www.aerialsandtv.com/aerials.html#ElementCount

I've got a loft aerial.

10 "element", 8 flat directors, dipole, reflector plate. It's wedged as
far up to the apex as it will go.

There was engineering a few weeks ago, reduced signal on the HD
multiplex, I lost all HD channels. I tried a "48 element" wideband high
gain aerial, 10 "X" directors, a flat director, dipole and 8 bar
reflector. Due to it's length and size of reflector it was about 1ft
lower in loft than the short aerial. I lost more channels. Taking the
upper 1/2 of the reflector off improved it a bit but not a lot.

Just had to suffer channel loss until the signal was back to full strength.