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The
early UHF only sets had buttons for
BBC1,
BBC2, ITA1, ITA2.
Some
early colour sets were Dual Standard VHF/UHF 405/625 line and some of the
buttons were for VHF.
Some
sets also had 2 rotary controls. A switch for VHF channels 2-13 with one
position marked UHF, and a rotary pot with gearing to fine tune anywhere
between
21-68.
Keith
Only 4 - some early TV's had many more station
buttons. It obviously never would have worked very
well.
A reason to switch off the analogue
transmitters
sooner ? Perhaps it will last as long as metrification!
Steve.
----- Original Message -----
Sent: Sunday, September 23, 2001 9:35
AM
Subject: RE: [ukha_d] OnDigital Signal
Breakup...
Many people had the same problem with CH5.
35
& 37 were assigned to channel 5 for large parts of the country and
many
people needed a wideband aerial to get CH5.
The basic
problems are...
1. The channels spacing were only ever designed to
accomodate 4 channels.
2. The UK is physically too small to have the
number of transmitters it
does.
Most of the time the signals will
keep within the defined boundaries of the
transmitter footprint, but in
the summer, atmospheric conditions make the
signals travel much further
into other areas using the same frequencies. Now
the 7 extra channels
are
needed everywhere (CH5 + 6 Muxes) anything being
received on those
frequencies will mess up reception.
Because of the above problems
with skip, Channel 5 is often at a much lower
power than Ch 1-4. Digital
can work with much lower levels but if it happens
to get swamped by a
strong analogue signal you lose digital.
Keith
>
-----Original Message-----
> From: Phil Harris
[mailto:phillip.harris1@xxxxxxx]
> Sent: 22 September 2001
23:01
> To: ukha_d@xxxxxxx> Subject: RE: [ukha_d]
OnDigital Signal Breakup...
>
>
> I have no objection to
then being in with the analogue channels ... what
> bums me off is
that out here almost everyone needs a new wideband aerial
> when they
switch to digital as the ITV MUX is completely the
> opposite end
of
> the band from all the others and hence fallsoutside the
reception
of a
> narrow band aerial...
>
>
Phil
>
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