A Sky, cable and digital tv forum. Digital TV Banter

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » Digital TV Banter forum » Digital TV Newsgroups » uk.tech.digital-tv (Digital TV - General)
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

uk.tech.digital-tv (Digital TV - General) (uk.tech.digital-tv) Discussion of all matters technical in origin related to the reception of digital television transmissions, be they via satellite, terrestrial or cable. Advertising is forbidden, with no exceptions.

No reflector on new TV antenna



 
 
Thread Tools Display Modes
  #11  
Old May 16th 17, 07:36 PM posted to uk.tech.digital-tv
Ian Field
external usenet poster
 
Posts: 28
Default No reflector on new TV antenna



"Brian Gaff" wrote in message
news
Is it perchance a log periodic?


They're allegedly better - some cheap installers put up the old type with a
very conspicuous reflector because; "they look the part".

  #12  
Old May 17th 17, 06:48 AM posted to uk.tech.digital-tv
Brian Gaff
external usenet poster
 
Posts: 6,505
Default No reflector on new TV antenna

Besides the local pigeons like the reflector as they can bounce on it till
it drops off, no doubt the plastic is rotted by guano.
Brian

--
----- -
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please!
"Ian Field" wrote in message
...


"Brian Gaff" wrote in message
news
Is it perchance a log periodic?


They're allegedly better - some cheap installers put up the old type with
a very conspicuous reflector because; "they look the part".



  #13  
Old May 17th 17, 08:21 AM posted to uk.tech.digital-tv
external usenet poster
 
Posts: 264
Default No reflector on new TV antenna

On Tue, 16 May 2017 18:25:04 +0100
Robin wrote:
On 16/05/2017 16:41, d wrote:
We just had a new antenna installed on the roof and it doesn't seem to have
a reflector at the base, just some extra elements instead. Is this normal
these days and is it something to do with digital vs analogue TV or just
cost cutting?

Does it look like this?

http://www.labgear.co.uk/wp-content/...original-1.jpg


Very similar except a bit longer.

--
Spud

  #14  
Old May 17th 17, 08:28 AM posted to uk.tech.digital-tv
external usenet poster
 
Posts: 264
Default No reflector on new TV antenna

On Wed, 17 May 2017 07:48:26 +0100
"Brian Gaff" wrote:
Besides the local pigeons like the reflector as they can bounce on it till
it drops off, no doubt the plastic is rotted by guano.


So why are ones without a reflector installed now, is it simply cost?

--
Spud

  #15  
Old May 17th 17, 09:48 AM posted to uk.tech.digital-tv
Martin[_2_]
external usenet poster
 
Posts: 8,651
Default No reflector on new TV antenna

The author has marked this message not to be archived. This post will be deleted on May 24, 2017.

On Tue, 16 May 2017 18:45:14 +0100, Mark Carver
wrote:

On 16/05/2017 18:30, alan_m wrote:

A log-period aerial?


Quite common these days in high/medium signal areas.


It's just that every 28 days of so, they suddenly stop working.


or worse still go into overdrive.
--

Martin in Zuid Holland



  #17  
Old May 17th 17, 10:29 AM posted to uk.tech.digital-tv
David Woolley[_2_]
external usenet poster
 
Posts: 514
Default No reflector on new TV antenna

On 17/05/17 11:04, David Woolley wrote:
The Yagi design, which typically has a reflector, can only handle a
narrow range of channels, but can do so better for a given physical
size. Nowadays, the range of channels keep being changed, and there are
often outlier channels that are not compatible with an aerial designed
for the main group.


I should possibly point out that the channels that I am talking about
are the pre-digital switchover channels. In the digital world, these are
called multiplexes. Whilst the number available in an area will vary,
the number of active ones is probably mainly between 6 and 10. The
Freeview channel numbers are split between these multiplex channels, but
which multiplex is used for which Freeview channel is more of a
commercial than a technical decision.
  #18  
Old May 17th 17, 10:55 AM posted to uk.tech.digital-tv
external usenet poster
 
Posts: 264
Default No reflector on new TV antenna

On Wed, 17 May 2017 11:04:34 +0100
David Woolley wrote:
On 17/05/17 09:28, d wrote:
So why are ones without a reflector installed now, is it simply cost?


The Yagi design, which typically has a reflector, can only handle a
narrow range of channels, but can do so better for a given physical
size. Nowadays, the range of channels keep being changed, and there are
often outlier channels that are not compatible with an aerial designed
for the main group.


But I thought the UHF range of Freeview was actually less than that of the
old PAL broadcasts since the government had sold off part of the spectrum?

--
Spud

  #20  
Old May 17th 17, 11:15 AM posted to uk.tech.digital-tv
external usenet poster
 
Posts: 264
Default No reflector on new TV antenna

On Wed, 17 May 2017 12:01:29 +0100
David Woolley wrote:
On 17/05/17 11:55, d wrote:
But I thought the UHF range of Freeview was actually less than that of the
old PAL broadcasts since the government had sold off part of the spectrum?


Originally, channels were grouped, so that, for instance, London only
got low numbered channels. As a result, although the total available
frequency range was larger, the range needed in any one place was a lot
smaller.


Are you saying that rooftop antenna centre frequencies varied between regions?

--
Spud

 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT. The time now is 04:13 AM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.Search Engine Optimization by vBSEO 2.4.0
Copyright 2004-2017 Digital TV Banter.
The comments are property of their posters.