'DAT45' type aerials springing up in Bedfordshire

"J G Miller" wrote in message
...
On Sun, 22 Mar 2009 19:55:16 +0000, Marky P wrote:
They are the latter. I knew they weren't proper DAT45's, hence the term
I used in my OP. :-)

Yes I did notice you had made the distinction, and I was trying to get
confirmation of what I thought you had seen.

But what will no doubt remain a mystery is, if the householders were
charged for the price of a genuine DAT-45, rather than the cheaper
copied style model price.

The difference would be small beer compared to the total invoice.

Bill

On Mon, 23 Mar 2009 14:07:39 +0000, chunkyoldcortina wrote:

Presumably the offending antenna-bodger 'needed' the extra gain of the
DAT75 to offset the loss he'd managed to engineer by installing the
stupid thing horizontally-polarised.

If you mount one in a VP manner, are you effectively pointing in three
different directions?!

Presumably the same applies to HP except in the vertical direction.
What is the function of the two outer booms? Seems like F all to me.

In message , Bill Wright
wrote

"J G Miller" wrote in message
...
On Sun, 22 Mar 2009 19:55:16 +0000, Marky P wrote:
They are the latter. I knew they weren't proper DAT45's, hence the term
I used in my OP. :-)

Yes I did notice you had made the distinction, and I was trying to get
confirmation of what I thought you had seen.

But what will no doubt remain a mystery is, if the householders were
charged for the price of a genuine DAT-45, rather than the cheaper
copied style model price.

The difference would be small beer compared to the total invoice.


small beer? Surely you mean Red Bull?
--
Alan
news2006 {at} amac {dot} f2s {dot} com

"Paul Ratcliffe" wrote in message
...
On Mon, 23 Mar 2009 14:07:39 +0000, chunkyoldcortina
wrote:

Presumably the same applies to HP except in the vertical direction.
What is the function of the two outer booms? Seems like F all to me.

In your customarily succinct way Mr Radcliffe I think you have expressed a
great truth.

Bill

"Alan" wrote in message
...
In message , Bill Wright

The difference would be small beer compared to the total invoice.


small beer? Surely you mean Red Bull?

Yes, of course.

Bill

On Tue, 24 Mar 2009 00:50:14 -0000, Bill Wright
wrote:

Presumably the same applies to HP except in the vertical direction.
What is the function of the two outer booms? Seems like F all to me.

In your customarily succinct way Mr Radcliffe I think you have expressed a
great truth.

Be interesting to perform surgery on one of these beasts and compare
measurements taken before and after.

"Paul Ratcliffe" wrote in message
...
On Tue, 24 Mar 2009 00:50:14 -0000, Bill Wright

wrote:

Presumably the same applies to HP except in the vertical direction.
What is the function of the two outer booms? Seems like F all to me.

In your customarily succinct way Mr Radcliffe I think you have expressed
a
great truth.

Be interesting to perform surgery on one of these beasts and compare
measurements taken before and after.

I guess it would be possible to remove the two outer director chains then
adjust the matching to compensate, and achieve much the same gain as before.

Bill

"Tanuki" wrote in message
...
In , Paul Ratcliffe [email protected]
clara34.co56.uk78 said
What is the function of the two outer booms? Seems like F all to me.

The two outer booms are there to provide an extra 5.7dB marketing-gain.

s'obvious innit - it's to catch the signal reflections from the ground and
clouds. Also if it's a bit breezy as it waggles back and forth (what with
such a big aerial on the undersized pole) either the top or bottom ones will
be pointing at the transmitter so no probs there!

--
Paul S

"Paul S" [email protected] wrote in message
...

"Tanuki" wrote in message
...
In , Paul Ratcliffe [email protected]
clara34.co56.uk78 said
What is the function of the two outer booms? Seems like F all to me.

The two outer booms are there to provide an extra 5.7dB marketing-gain.

s'obvious innit - it's to catch the signal reflections from the ground and
clouds. Also if it's a bit breezy as it waggles back and forth (what with
such a big aerial on the undersized pole) either the top or bottom ones
will be pointing at the transmitter so no probs there!

The justification will be that they increase the capture area.

Bill

In message , Bill Wright
writes

"Paul S" [email protected] wrote in message
...

"Tanuki" wrote in message
...
In , Paul Ratcliffe [email protected]
clara34.co56.uk78 said
What is the function of the two outer booms? Seems like F all to me.

The two outer booms are there to provide an extra 5.7dB marketing-gain.

s'obvious innit - it's to catch the signal reflections from the ground and
clouds. Also if it's a bit breezy as it waggles back and forth (what with
such a big aerial on the undersized pole) either the top or bottom ones
will be pointing at the transmitter so no probs there!

The justification will be that they increase the capture area.

There are a lot of aerials with 'X-shaped' directors, each of which
consists of four insulated approximately halfwave elements. At the
tail end, the active element is usually still only a halfwave folded
dipole. How much more effective are the X-shaped directors compared with
single elements?
--
Ian