Freeview, the Wrekin

On 2/27/2011 3:58 AM, Bill Wright wrote:
Woody wrote:

Sorry, minor mistake. The aerial that will give you the rising
response is an E-group. Typically about 4dB gain at Ch21 up to 12dB
gain around Ch55.

'ang on a minute! A Gp E covers 35 to 68. You mean a Gp K, which
covers 21 to 48 and like the unicorn* is a mythological creature, much
discussed but never actually seen in the flesh. As for an aerial that
covers 21 to 55, as you suggest, that would have to be wideband.

The problem with wideband yagis is that because the gain is ****e at
the bottom end the directivity is as well. The performance re ghosting
and CCI is abysmal.

*the unicorn is a type of colinear omnidirectional vertically
polarised aerial used mostly for DAB reception on Vikings' integrated
helmet radios. The active elements are stacked inside a horn-shaped
radome (hence the name). In order to allow diversity reception the
horn aerials are usually deployed in pairs, one on each side of the
helmet.

Bill
What about helical aerials Bill? in my brief sojourn to the army many
years ago they seemed to have lots of these things but I've never seen
them used on domestic applications.
Don

"Bill Wright" wrote in message
...
Woody wrote:

Sorry, minor mistake. The aerial that will give you the rising
response is an E-group. Typically about 4dB gain at Ch21 up to
12dB gain around Ch55.

'ang on a minute! A Gp E covers 35 to 68. You mean a Gp K,
which covers 21 to 48 and like the unicorn* is a mythological
creature, much discussed but never actually seen in the flesh.
As for an aerial that covers 21 to 55, as you suggest, that
would have to be wideband.



I'm sorry to do this to you BIll but it's that outfit up Langsett
Road nearly opposite Morrisons.

http://www.aerialsandtv.com/

I would however agree with you (what a creep.......)

Now the bit about DAB is more like it!


Woody

harrogate three at ntlworld dot com

Donwill wrote:

What about helical aerials Bill? in my brief sojourn to the army many
years ago they seemed to have lots of these things but I've never seen
them used on domestic applications.
Don
In the days of analogue there was an idea floating around to use
circular polarisation and helical aerials to reduce ('eliminate') ghosting.

Bill

On Sunday, February 27th, 2011 at 03:58:24h +0000, Bill Wright expounded:

You mean a Gp K, which covers 21 to 48 and like the unicorn*
is a mythological creature, much discussed but never actually
seen in the flesh.

May I suggest that you have not seen one of these because you
have failed to chain a maiden truly pure in heart to your
antenna mast.

So will a couple of sales photographs convince you that these
models really do exist and are available for purchase, even
manufactured by the blessed Blake company?

http://www.tvtrade.IE/grey-group-k-uhf-aerial.html

http://www.vanjak.COM/index.php?dispatch=categories.view&category_id=263

*the unicorn is a type of colinear omnidirectional vertically polarised
aerial used mostly for DAB reception on Vikings' integrated helmet
radios.

This really is a myth since Vikings never had horns on their helmets,
but The Vikings do indeed have helmets with radios inside them,
identified by the green dot on the rear.

http://www.gotknowhow.COM/media/article/images/2010/08/23/628-giant-vikingsradio.jpg

http://www.nydailynews.COM/sports/football/giants/2008/04/02/2008-04-02_nfl_defenses_will_be_armed_with_radio_he.html

http://hotstuff.linkpress.INFO/why-are-nfl-quarterbacks-wearing-a-green-dot-on-their-helmet/

In article , Woody
scribeth thus
"tony sayer" wrote in message
news
The log periodic is much flatter. If The Wrekin is LOS and not
too far away that is the one I would go for. Try to get one
that
has a ready fitted connector at the mounting end. I only found
out recently that with a L-P the cable should be fed back
through
one of the tubes as so doing is part of the matching: if you
get
one with a connector already fitted then the match is done for
you.


Odd!, Which make and model was that Woody?..
--



Don't ask me where I saw it - I've been to sleep since then!

I must admit that I was a bit puzzled by the Physics - if indeed
Physics is involved - but nonetheless it was there in black and
white.

Perhaps William might have some thoughts - printable please Bill?




Might have been some sort of stub balun?..
--
Tony Sayer

J G Miller wrote:
On Sunday, February 27th, 2011 at 03:58:24h +0000, Bill Wright expounded:

You mean a Gp K, which covers 21 to 48 and like the unicorn*
is a mythological creature, much discussed but never actually
seen in the flesh.

May I suggest that you have not seen one of these because you
have failed to chain a maiden truly pure in heart to your
antenna mast.
I have done that, loads of times! Not round here though. You can't get
the raw material.


So will a couple of sales photographs convince you that these
models really do exist and are available for purchase, even
manufactured by the blessed Blake company?

http://www.tvtrade.IE/grey-group-k-uhf-aerial.html

A bit desperate saying it's ideal for Mount Leinster Transmitter (Analogue)!



http://www.vanjak.COM/index.php?dispatch=categories.view&category_id=263

And "This item is not normally stocked" sort of tells you something...

Bill

On Monday, February 28th, 2011 at 16:05:35h +0000, Bill Wright complained:

Not round here though. You can't get the raw material.

Unlike the good old days. If you get a chance, watch the
movie 1612 (Time of Troubles) which features a unicorn
right at the end.

http://www.youtube.COM/watch?v=jH2P3LeK_fI

A bit desperate saying it's ideal for Mount Leinster Transmitter
(Analogue)!

Why is that desperate?

And "This item is not normally stocked" sort of tells you something...

It says that for the Blake 14E K Contract Aerial (BUA/12 OOR),
and 14 elements does seem very non-standard.

But it sort of says something that you pick that out of the three
antennas displayed when for the other two there is stock in abundance!

Blake 10E K Contract Aerial CODE: BUA/05
Blake 10 Element K Contract Aerial
In stock: 105Â*item(s)

Blake 18E K Contract Aerial CODE: BUA/11
Blake 18 Element K Contract Aerial
In stock: 205Â*item(s)

Also Aerials and TV online retail store stocks Group K
versions of the Yagi18 and XB10 models --

http://www.aerialsandtv.COM/onlineaerials.html

So Group K antennas are not mythical, just a little
hard to find in stock I would suggest.

J G Miller wrote:

So Group K antennas are not mythical, just a little
hard to find in stock I would suggest.

So I'm guilty of hyperbole once again! I'm a hyperbolic bugger aren't I?

Bill

On Tuesday, March 1st, 2011 at 02:32:39h +0000, Bill Wright declared:

So I'm guilty of hyperbole once again!

I thought in your business, you preferred paraboles