The guy I mentioned recently who phoned me asking where he could get a
replacement TV signal booster ... that he didn't actually need ... (
at the TV works fine without it, probably left over from the
switchover) seems to have his aerial pointing in a slightly different
direction (off maybe 25 Deg [1]) to the majority (but not all) near
him bit the bit that I spotted as we walked past yesterday was that it
had a tubular bracket that runs underneath the bottom of the director
bit but it's mounted on a pole on the chimney stack ... at the back,
behind the reflector?

Is there any reason you would need that bracket left on (signal wise
or strength etc) or is it actually superfluous and therefore just
adding weight and windage and possibly, slight loss of performance?

Cheers, T i m

[1] There is a fairly large metal structure that he could be looking
right past if his aerial was set in the same line as all those the
transmitter side of the obstruction, so could that account for the
offset, even with digital (multipath)?

On 16/10/2020 12:20, T i m wrote:
bit the bit that I spotted as we walked past yesterday was that it
had a tubular bracket that runs underneath the bottom of the director
bit but it's mounted on a pole on the chimney stack ... at the back,
behind the reflector?

The aerial is from a DIY shed. it has two mounting options, the cradle
underneath or end mounting. For the latter the cradle isn't used. The
person hasn't realised that. It's very common.

Bill

On Fri, 16 Oct 2020 12:58:07 +0100, williamwright
wrote:

On 16/10/2020 12:20, T i m wrote:
bit the bit that I spotted as we walked past yesterday was that it
had a tubular bracket that runs underneath the bottom of the director
bit but it's mounted on a pole on the chimney stack ... at the back,
behind the reflector?

The aerial is from a DIY shed. it has two mounting options, the cradle
underneath or end mounting. For the latter the cradle isn't used.

I thought that was the case but I also thought I'd better ask.

The
person hasn't realised that. It's very common.

The aerials I have seen that come in two parts give you a clamshell
type bracket that contains the two ends and bolt up (wingnut?), then
you would put that cradle bracket on if you wanted to mount it that
way.

I'll mention it when I see / speak to him next (thanks).

Cheers, T i m

On 16/10/2020 13:23, T i m wrote:
On Fri, 16 Oct 2020 12:58:07 +0100, williamwright
wrote:

On 16/10/2020 12:20, T i m wrote:
bit the bit that I spotted as we walked past yesterday was that it
had a tubular bracket that runs underneath the bottom of the director
bit but it's mounted on a pole on the chimney stack ... at the back,
behind the reflector?

The aerial is from a DIY shed. it has two mounting options, the cradle
underneath or end mounting. For the latter the cradle isn't used.

I thought that was the case but I also thought I'd better ask.

The
person hasn't realised that. It's very common.

The aerials I have seen that come in two parts give you a clamshell
type bracket that contains the two ends and bolt up (wingnut?), then
you would put that cradle bracket on if you wanted to mount it that
way.

I'll mention it when I see / speak to him next (thanks).

Cheers, T i m


http://www.wrightsaerials.tv/aerialp.../diy/022.shtml

Bill

On Fri, 16 Oct 2020 14:38:19 +0100, williamwright
wrote:

snip

The aerials I have seen that come in two parts give you a clamshell
type bracket that contains the two ends and bolt up (wingnut?), then
you would put that cradle bracket on if you wanted to mount it that
way.


http://www.wrightsaerials.tv/aerialp.../diy/022.shtml

Hehe, amazing, but what percentage of all the aerials up there are
like that though would you say?

We just walked a couple of different routes though some housing areas
and the only one we saw mounted badly like that was the one I
mentioned. Ok, some were also laying on the roof or swinging about
round the stack but otherwise they were all ok? ;-)

Cheers, T i m

On 16/10/2020 17:54, T i m wrote:
On Fri, 16 Oct 2020 14:38:19 +0100, williamwright
wrote:

snip

The aerials I have seen that come in two parts give you a clamshell
type bracket that contains the two ends and bolt up (wingnut?), then
you would put that cradle bracket on if you wanted to mount it that
way.


http://www.wrightsaerials.tv/aerialp.../diy/022.shtml

Hehe, amazing, but what percentage of all the aerials up there are
like that though would you say?

We just walked a couple of different routes though some housing areas
and the only one we saw mounted badly like that was the one I
mentioned. Ok, some were also laying on the roof or swinging about
round the stack but otherwise they were all ok? ;-)

There were lots a few years ago, but I think a lot of them have fallen
down. Maybe the instructions are clearer now.

Bill

Sounds like nobody looks up except sad people like us, well you, since I
would not see them now. I used to love looking at the aerials when on
holiday and wondered in many cases A whether they still worked at all, and
B, what on earth they were aiming at!
Of course a stacking kit merely contained a strut and associated brackets,
since the two U brackets were turned at right angles to make the
spacer/mounting part and the strut was used to support the front U for
stability. Clever really, but the beam width was very critical of course.
The Y cable was of vastly superior quality, but the termination of it for
attaching to the downlead was crap and even when smothered in protection
tended to oxidise and end up welded in.
Brian

--

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

Blind user, so no pictures please
Note this Signature is meaningless.!
"T i m" wrote in message
...
On Fri, 16 Oct 2020 14:38:19 +0100, williamwright
wrote:

snip

The aerials I have seen that come in two parts give you a clamshell
type bracket that contains the two ends and bolt up (wingnut?), then
you would put that cradle bracket on if you wanted to mount it that
way.


http://www.wrightsaerials.tv/aerialp.../diy/022.shtml

Hehe, amazing, but what percentage of all the aerials up there are
like that though would you say?

We just walked a couple of different routes though some housing areas
and the only one we saw mounted badly like that was the one I
mentioned. Ok, some were also laying on the roof or swinging about
round the stack but otherwise they were all ok? ;-)

Cheers, T i m

On 16/10/2020 14:38, williamwright wrote:



http://www.wrightsaerials.tv/aerialp.../diy/022.shtml

The loft aerial here was mounted through the cradle with the pole going
vertically through directors 4 and 5 (IIRC). An end-mount would have
been ok as there would never be any wind force on the aerial.

Out of interest, why does it not appear to matter that the pole goes
through the aerial when fixed by the cradle? Does it not affect signal
reception at all?

--

Jeff

On Sat, 17 Oct 2020 09:41:53 +0100, Jeff Layman
wrote:

On 16/10/2020 14:38, williamwright wrote:



http://www.wrightsaerials.tv/aerialp.../diy/022.shtml

The loft aerial here was mounted through the cradle with the pole going
vertically through directors 4 and 5 (IIRC). An end-mount would have
been ok as there would never be any wind force on the aerial.

Out of interest, why does it not appear to matter that the pole goes
through the aerial when fixed by the cradle? Does it not affect signal
reception at all?

I always wondered that and would have tried to avoid doing so if
possible (cradle mount on the very top of a pole and rear mount if
there had to be any others on the same pole)?

Cheers, T i m

On 17/10/2020 09:41, Jeff Layman wrote:
Out of interest, why does it not appear to matter that the pole goes
through the aerial when fixed by the cradle? Does it not affect signal
reception at all?

It does, but not much when the mast is at 90deg to the aerial's
polarisation.

Bill

On 16/10/2020 14:38, williamwright wrote:
On 16/10/2020 13:23, T i m wrote:
On Fri, 16 Oct 2020 12:58:07 +0100, williamwright
wrote:

On 16/10/2020 12:20, T i m wrote:
bit the bit that I spotted as we walked past yesterday was that it
had a tubular bracket that runs underneath the bottom of the director
bit but it's mounted on a pole on the chimney stack ... at the back,
behind the reflector?

The aerial is from a DIY shed. it has two mounting options, the cradle
underneath or end mounting. For the latter the cradle isn't used.

I thought that was the case but I also thought I'd better ask.

The
person hasn't realised that. It's very common.

The aerials I have seen that come in two parts give you a clamshell
type bracket that contains the two ends and bolt up (wingnut?), then
you would put that cradle bracket on if you wanted to mount it that
way.

I'll mention it when I see / speak to him next (thanks).

Cheers, T i m


http://www.wrightsaerials.tv/aerialp.../diy/022.shtml

Bill

Room for expansion on that pole. And he didn't read the instructions
which probably showed how to route the cable out behind the
reflector.

Perhaps he is picking up a reflection not the direct signal?
Do you mean a U shaped bracket under the aerial as one would use to mount
it centrally on a pole? If so then yes, if there is an extension behind the
reflector, the bracket or U piece is just adding weight, but if the pole is
tall enough that would allow the aerial to be mounted balanced centrally
without being exposed to stuff from a chimney, then why not do that instead,
as the twisting lop sided stresses are often far more destructive than
than a central weight and only side forces in a wind.
I have seen this done when somebody wanted to mount another aerial on the
top, but normally you would remove the extraneous bracket then.
Brian

--

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

Blind user, so no pictures please
Note this Signature is meaningless.!
"T i m" wrote in message
...
The guy I mentioned recently who phoned me asking where he could get a
replacement TV signal booster ... that he didn't actually need ... (
at the TV works fine without it, probably left over from the
switchover) seems to have his aerial pointing in a slightly different
direction (off maybe 25 Deg [1]) to the majority (but not all) near
him bit the bit that I spotted as we walked past yesterday was that it
had a tubular bracket that runs underneath the bottom of the director
bit but it's mounted on a pole on the chimney stack ... at the back,
behind the reflector?

Is there any reason you would need that bracket left on (signal wise
or strength etc) or is it actually superfluous and therefore just
adding weight and windage and possibly, slight loss of performance?

Cheers, T i m

[1] There is a fairly large metal structure that he could be looking
right past if his aerial was set in the same line as all those the
transmitter side of the obstruction, so could that account for the
offset, even with digital (multipath)?