In article , Terry D
scribeth thus
Sorry if this is an inappropriate group for my posting, but I know there are
some very knowledgeable people out there.

I have an 8" LCD Evesham TV (analogue signal), which I watch at my desk
whilst working on my computer. The TV works fine with a small set-top
aerial (normally blu-tacked to the top of one of my printers!). However,
when I want to watch channel 4, I have to move the aerial down by about one
foot so I can achieve decent reception - all other channels are fine. Why
should this be? It doesn't really worry me (except when I want to watch
Countdown) but is there a technical explanation for this? The TV on the
ground floor of my house.

Terry D.



Simple.. Their on different frequencies and chances are that what is
known as multipath is happening this is where some signals take
different paths to get to the aerial and sometimes they cancel out or
add together.


--
Tony Sayer