Does this look like an IRS Aerial/Satellite
 

In article , charles
scribeth thus
In article , Nick Le Lievre
wrote:
"charles" wrote in message
...

I think you misuse the word "designed".

a few weeks ago, you knew nothing about reception - now you're an
expert. Remarkable facility - Wikepedia.

I am not an expert but these things are manufactured, not by the
installers but by satellite equipment makers, so if you want to blame
anyone blame them.

that statement shows just how little you know about teh subject.


Quite...
--
Tony Sayer

Does this look like an IRS Aerial/Satellite
 

"Nick Le Lievre" wrote in message
...
"charles" wrote in message
...

Does anyone of them light a spark in your memory...

sorry no. but looking at Google Maps, I reckon they were somewhere off
the
Bagot or Longueville Road - on the right after coming out of the tunnel.
Possibly Miladi Farm Estate.

Telefitters are 19 Green Road, St Clement that is on the right after
coming out of the Tunnel, could it be them your thinking of? I know the
Jersey Homes Trust now use Telefitters for maintenance of the IRS system
where my mother lives after Digital Communication Systems dissapeared.

Sorry Green Street is right after the Tunnel, Green Road is a bit further on
you can see it on a map here
http://www.localoctopus.co.uk/jersey...ers-jersey-ltd

Does this look like an IRS Aerial/Satellite
 

On Sunday, August 8th, 2010 at 18:01:31h +0100, Peter Duncanson wrote:

I don't think they need that sort of fundamental maths and physics, just
some figures that can be fed into a standard formula.

True -- but somebody with some knowledge of engineering (mathematics plus
physics) has to create those standard formulae.

In fact, does not the modern up to date antenna installer have a
software program on their PC on which they virtually place the
elements on the pole and it calculates the necessary thickness
and diameter of the pole, and the required fixings and necessary
size of the wall bolts etc? ;)

Does this look like an IRS Aerial/Satellite
 

J G Miller wrote:
On Sunday, August 8th, 2010 at 18:01:31h +0100, Peter Duncanson wrote:
I don't think they need that sort of fundamental maths and physics, just
some figures that can be fed into a standard formula.

True -- but somebody with some knowledge of engineering (mathematics plus
physics) has to create those standard formulae.

In fact, does not the modern up to date antenna installer have a
software program on their PC on which they virtually place the
elements on the pole and it calculates the necessary thickness
and diameter of the pole, and the required fixings and necessary
size of the wall bolts etc? ;)

I think you'll find some use something much simpler; experience.

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

www.paras.org.uk

Does this look like an IRS Aerial/Satellite
 

Nick Le Lievre wrote:
"charles" wrote in message
...

I think you misuse the word "designed".

a few weeks ago, you knew nothing about reception - now you're an expert.
Remarkable facility - Wikepedia.

I am not an expert but these things are manufactured, not by the
installers but by satellite equipment makers, so if you want to blame
anyone blame them.

Now you're just talking out of your arse.
--
Adrian

Does this look like an IRS Aerial/Satellite
 

In article , Nick Le Lievre
wrote:
"charles" wrote in message
...

Does anyone of them light a spark in your memory...

sorry no. but looking at Google Maps, I reckon they were somewhere off
the Bagot or Longueville Road - on the right after coming out of the
tunnel. Possibly Miladi Farm Estate.

Telefitters are 19 Green Road, St Clement that is on the right after
coming out of the Tunnel, could it be them your thinking of? I know the
Jersey Homes Trust now use Telefitters for maintenance of the IRS system
where my mother lives after Digital Communication Systems dissapeared.

not that address anyhow. Looking at the satellite picture with Google maps
it looks more like Le Clos Gosset.

--
From KT24

Using a RISC OS computer running v5.16

Does this look like an IRS Aerial/Satellite
 

On Aug 8, 3:08*pm, "Nick Le Lievre"
wrote:
"Steve Terry" wrote in message

...



An accomplished aerial erector has to envision what will happen
under strong wind conditions.

Surely it would take a Hurricane to bring them down and as we don`t get many
Hurricanes in Jersey I am not too worried.

I would think any type of aeroplane would bring the aerial down in the
event of a direct hit.

Bill

Does this look like an IRS Aerial/Satellite
 

On Aug 8, 3:22*pm, "Nick Le Lievre"
wrote:
"Adrian" wrote in message

om...



Several people have pointed out that it is a poor installation, and their
reasons for saying so.

Yeah but without actually looking at it closely how can you know for sure
that it is a poor installation. Looks can be deceiving. I am not qualified
to comment either way and I would hope that those who have commented are
qualified to comment, for instance what is your technical background?

All right then. I've passed no comment so far Nick, because others
have said it all, but just take my word for it, that is a **** poor
installation. I can say that just by looking at the pic -- in fact I
could say that if the pic had been taken from ten miles away in thick
fog. And don't you worry about whether I'm qualified to judge. Just
have faith.

Bill

Does this look like an IRS Aerial/Satellite
 

On Aug 8, 3:52*pm, J G Miller wrote:
On Sunday, August 8th, 2010, at 03:51:13 +0100, Steve Terry explained:



An accomplished aerial erector has to envision what will happen under
strong wind conditions.

Surely nor just envision, but done the calculation of wind loading
and thus determined the necessary size of bolts and mast to use?

Yes, all aerial riggers spend weeks before every job doing the wind
loading calculations. It's really important to get the size of the
bolts and the mast right.

Bill

Does this look like an IRS Aerial/Satellite
 

I just thought I'd take another look at this picture. What follows is,
of course, just my opinion, based on what the photograph appears to
show.

1. If the TV aerial is looking at Fremont Point it should be a Group
B, not a wideband model.
2. The TV aerial is obviously looking through the roof of the
building.
3. The FM aerial is one of the very ineffective 'halos'. It should be
a vertical dipole or a directional type.
4. The mast is too flimsy for the load. It is 1.5" diameter at most.
This load needs a 2" scaffold tube. Assuming the mast is thin walled
aluminium or steel the stress between the dish and the top wall
bracket could eventually break or bend it.
5. The dish is too high on the mast.
6. The location has been badly chosen (although there could have been
constraints). As well as the aerial being screened by the roof there's
probably been a problem with the dish being screened by the other
roof, otherwise it could be lower. The installer probably hasn't put
any thought into it.
7. The wall brackets are too close together.
8. The wall brackets allow only one fixing on each foot. Two is a
safer minimum for this load.
9. The material under the rendering is likely to be blockwork, which
is unlikely to provide a secure fixing.
10. It's very likely, looking at the building style, that the masonry
stops level with the plastic underdrawing. This means that the top
bracket fixings have no masonry load above them. This normally leads
to early failure.
11. The TV and FM aerials are diplexed at the masthead. This is bad
practice for a number of reasons.

The installation is typical of many erected for distribution systems
in the last few years. It's a sad state of affairs. We spend a lot of
time repairing installations like this. Often the installation has
failed in the first few months or years. Many of the ones shown in the
www.wrightsaerial.tv Rogues Gallery are like this.

Bill