In article ,
wrote:
We're in a "variable reception" area for Ridge Hill mast, about 20 miles
away. The Humax STB reports a very weak signal on most channels but the
picture is OK for much of the time - the boss would like it to be OK all
the time so I need some advice.
The current aerial is a 16 element Yagi, with a masthead amp and newly
replaced Webro WF100 cable; all connections are good. The house is tall
and the aerial is on a 1m'ish mast attached to a tall'ish chimney
(worryingly, a bit above the lightning conductor!).

It looks like I need to replace the aerial with a higher-gain type so
I'm wondering whether to go for a group A multi-boom type, a Yagi18A, an
XB16A or ... ? Also, the attic has lots of headroom (about 9 feet in the
centre) so, with a higher gain aerial, I'm tempted to try it in the
Attic to make life easier, but have no idea what attenuation the block
walls might cause(?).
All suggestions gratefully received.

If you're in an area that needa masthead amp , forget a loft aerial.
Also, a bigger (multi-element) might just double the signal you are
gettting. You might do better with a higher gain amplifier. Or go for
satellite

--
from KT24 in Surrey, England
"I'd rather die of exhaustion than die of boredom" Thomas Carlyle