Unusual Shaped Aerial

Whilst on a recent holiday in Wales I noticed a couple of strange
shaped aeials.

Number one www.3lanes.dsl.pipex.com/temp/aerial1.jpg was noticed on a
few rooftops in Aberyswyth, West Wales. No idea what this relates to.

Number two www.3lanes.dsl.pipex.com/temp/aerial2.jpg I suspect is a
flat version of a conventional yagi or log but that is only a guess.

Any enlightenment would be appreciated.

Geoff Lane

Geoff Lane wrote:
snip
Number one is a discone, used to be used with scanners.
Number two looks like a bit like my tv aerial, wideband grid?




--
They can get it out of your blood, but they can't get it out of your mind.


--
Charlie Parker

In article ,
Geoff Lane wrote:
Whilst on a recent holiday in Wales I noticed a couple of strange
shaped aeials.

Number one www.3lanes.dsl.pipex.com/temp/aerial1.jpg was noticed on a
few rooftops in Aberyswyth, West Wales. No idea what this relates to.

It's called "discone" and usaully used by people who scan the airwaves
across the vhf and uhf spectrum.


Number two www.3lanes.dsl.pipex.com/temp/aerial2.jpg I suspect is a
flat version of a conventional yagi or log but that is only a guess.

A 'grid' type of uhf aerial. It was 4 phased dipoles, one above the other.
I only know of two makes, Wolsey & Triax and it doesn't quite seem like
either that I know, but it might be an older Wolsey, which got discontinued
"because the trade found it too ruggged and they didn't get enought call
backs".


Any enlightenment would be appreciated.

Hope this helps

--
From KT24 - in "Leafy Surrey"

Using a RISC OS computer running v5.11

"Geoff Lane" wrote in message
...
Whilst on a recent holiday in Wales I noticed a couple of strange
shaped aeials.

Number one www.3lanes.dsl.pipex.com/temp/aerial1.jpg was noticed on a
few rooftops in Aberyswyth, West Wales. No idea what this relates to.

Number two www.3lanes.dsl.pipex.com/temp/aerial2.jpg I suspect is a
flat version of a conventional yagi or log but that is only a guess.

Any enlightenment would be appreciated.

Geoff Lane

As others have said, discone and grid aerial. Some discones can be used to
transmit on amateur bands 2m and 70cm so are ideal if space is limited.
Performance will not be that good. I am not sure why anyone would want a
scanner now unless they just listen to taxi firms, aircraft or wannabe
police men at shopping centres. Everything else hs gone digital.
The Grid aerial is OK but performance again is not too good for fringe
areas. After a while they go corroded and need a good cleaning. One that
Tandy sold before it shut down still works here. Signal strength is OK for
analogue but not for digital due to the lower transmit power. It is good at
stopping problems from a transmitter in the opposite direction from the one
being used!

Paul wrote:
"Geoff Lane" wrote in message

Number one www.3lanes.dsl.pipex.com/temp/aerial1.jpg was noticed on a
few rooftops in Aberyswyth, West Wales. No idea what this relates to.

As others have said, discone and grid aerial. Some discones can be used to
transmit on amateur bands 2m and 70cm so are ideal if space is limited.
Performance will not be that good. I am not sure why anyone would want a
scanner now unless they just listen to taxi firms, aircraft or wannabe
police men at shopping centres. Everything else hs gone digital.

When I was on Guernsey a few years ago, every other house in one street had
a discone for some reason. I've always wondered why ?


--
Mark
Please replace invalid and invalid with gmx and net to reply.

As others have said, discone and grid aerial. Some discones can be used
to
transmit on amateur bands 2m and 70cm so are ideal if space is limited.
Performance will not be that good. I am not sure why anyone would want a
scanner now unless they just listen to taxi firms, aircraft or wannabe
police men at shopping centres.

Wanabe shoplifters perhaps?
The other thing to mention about the Discone is that it receives both H & V
polarised signals. It is a compromise for both.

In fact "compromise" sums it up nicely.
--

Graham.

%Profound_observation%

On Sun, 1 Oct 2006 14:50:31 +0100, "Graham" wrote:

As others have said, discone and grid aerial. Some discones can be used
to
transmit on amateur bands 2m and 70cm so are ideal if space is limited.
Performance will not be that good. I am not sure why anyone would want a
scanner now unless they just listen to taxi firms, aircraft or wannabe
police men at shopping centres.

Wanabe shoplifters perhaps?
The other thing to mention about the Discone is that it receives both H & V
polarised signals. It is a compromise for both.

In fact "compromise" sums it up nicely.

It seems to be designed on the principle that -

"The more metal you have in the air it's gotta be better".

DG

aerial 1 is a discone aerial used for a scanner

AE


"Geoff Lane" wrote in message
...
Whilst on a recent holiday in Wales I noticed a couple of strange
shaped aeials.

Number one www.3lanes.dsl.pipex.com/temp/aerial1.jpg was noticed on a
few rooftops in Aberyswyth, West Wales. No idea what this relates to.

Number two www.3lanes.dsl.pipex.com/temp/aerial2.jpg I suspect is a
flat version of a conventional yagi or log but that is only a guess.

Any enlightenment would be appreciated.

Geoff Lane

On Sun, 01 Oct 2006 13:41:12 +0100, Geoff Lane
wrote:

Whilst on a recent holiday in Wales I noticed a couple of strange
shaped aeials.

Thanks for all the answers, amazing how something most people don't
even notice can be fascinating to others...

Geoff Lane

In message , Graham
writes
The other thing to mention about the Discone is that it receives both H & V
polarised signals. It is a compromise for both.

You sure?
Ian.

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