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Re: OT: Digital Switch Over Today

Frank Turner-Smith G3VKI wrote:

>"Ian Jackson" <ianREMOVETHISjackson@g3ohx.demon.co.uk> wrote
>
>> The gain curve of multi-element yagi UHF TV aerials is usually
>> 'escarpment-shaped', gently rising from the lowest channel and peaking at
>> the highest or - more likely - one or two channels below the highest.
>> Above this peak, the gain drops very rapidly as the main lobe of the polar
>> diagram starts to break up. Allocating Channel 5 on Ch37 was pushing it
>> for many Group A aerials (nominally 21 to 34). Ch42 will be well over the
>> edge of the escarpment.
>
>Thanks Ian, I'd forgotten about "FIVE" (as do so many, it seems). We've
got
>a Group A aerial aimed at Crystal Palace from about 30 miles away. Looking
>at the analogue channels, FIVE is clearly the weaker signal, and has a
>slight "ghost" which is not apparent on the other 4 channels. I foresee
>problems with Ch42, but will there be anything there that's not available on
>Sky? I don't want to waste good beer money and drinking time.

There's very little information about New Mux8, other than it's on
Ch42, so until the services carried on it are announced - which might
not be worth watching anyway - perhaps 'masterly inactivity' is the
way to go.

Wot u mite need is a 'digital aerial', which seems to be the
portmanteau word for a 'wideband aerial'.

--
from
Aero Spike
Not a member of the RSGB for 50 years 1959 - 2009

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