https://drive.google.com/file/d/1Mdm...ew?usp=sharing

On 29/01/2021 16:54, R D S wrote:
https://drive.google.com/file/d/1Mdm...ew?usp=sharing



A vertical aerial for whatever frequency it was designed for.

On Fri, 29 Jan 2021 17:06:02 +0000, RobH wrote:

On 29/01/2021 16:54, R D S wrote:
https://drive.google.com/file/d/1Mdm...zRb1CILe/view?
usp=sharing



A vertical aerial for whatever frequency it was designed for.

Likely VHF comms ? 2M amateur radio?

Avpx


--
The truth may be out there, but lies are inside your head.
(Hogfather)
Fri 10013 Sep 17:35:01 GMT 1993
17:35:01 up 2 days, 7:16, 10 users, load average: 6.83, 7.09, 7.12

On 29/01/2021 16:54, R D S wrote:
https://drive.google.com/file/d/1Mdm...ew?usp=sharing

Dunno, but it looks like it would make a pretty good lightning conductor.

--

Jeff

On 29/01/2021 17:54, Jeff Layman wrote:
On 29/01/2021 16:54, R D S wrote:
https://drive.google.com/file/d/1Mdm...ew?usp=sharing


Dunno, but it looks like it would make a pretty good lightning conductor.


a FM quarter wave end fed metal rod? Would be about 765 mm long....

On 29/01/2021 16:54, R D S wrote:
https://drive.google.com/file/d/1Mdm...ew?usp=sharing


looks like crap coax anyway ....

On 29/01/2021 16:54, R D S wrote:
https://drive.google.com/file/d/1Mdm...ew?usp=sharing


It looks reminiscent of CB aerials.

Jimmy Stewart ... wrote on 29/01/2021 :
looks like crap coax anyway ....

The coax looks to be decent stuff, but very poorly installed. The
antenna seems not to have a ground plane.

On 29/01/2021 18:11, S wrote:
On 29/01/2021 17:54, Jeff Layman wrote:
On 29/01/2021 16:54, R D S wrote:
https://drive.google.com/file/d/1Mdm...ew?usp=sharing


Dunno, but it looks like it would make a pretty good lightning conductor.


a FM quarter wave end fed metal rod? Would be about 765 mm long....

? That aerial extends vertically perhaps 4 or 5 metres above the
chimney. I would be surprised if it isn't one of the highest points in
the street.

--

Jeff

On 29/01/2021 16:54, R D S wrote:
https://drive.google.com/file/d/1Mdm...ew?usp=sharing


The thing at the top could be a glass fibre colinear* for anything VHF
or UHF, including RSL VHF FM radio. Or it could be an old Aerialite AM
aerial (they had a coax feeder). Or anything really!

The mast and chimney brackets are very old. The corner plates have
almost rusted away. It looks as if an old mast and bracket pair has been
re-purposed, and lowered.

The two contract-quality UHF TV aerials are of different historic
channel groups; a Gp A and a Gp CD. The two TV aerial on the opposite
corner are the same, except that the top one has been replaced because
the boom on the top one snapped due to the U bolt hole being oversized.

If this is a shared chimney, the other corner belonging to the same
house as the tall aerial has what looks like a vertical dipole for
something or other, could be VHF FM but it looks a bit too long. There's
another aerial of some sort on the same fixing. These are much newer
than the tall mast (look at the corner plate nearest the camera).

*colinear: several dipoles in a stack, inside a shroud of some sort.
Gives a bit more gain than a single halfwave dipole.

Bill

"Harry Bloomfield"; "Esq." wrote in message
...
Jimmy Stewart ... wrote on 29/01/2021 :
looks like crap coax anyway ....

The coax looks to be decent stuff, but very poorly installed.

The antenna seems not to have a ground plane.

The top one doesn't need one.

On 29/01/2021 18:34, Harry Bloomfield wrote:
Jimmy Stewart ... wrote on 29/01/2021 :
looks like crap coax anyway ....

The coax looks to be decent stuff, but very poorly installed. The
antenna seems not to have a ground plane.
looks like tv 75ohn coax to me

Jimmy Stewart wrote on 29/01/2021 :
On 29/01/2021 18:34, Harry Bloomfield wrote:
Jimmy Stewart ... wrote on 29/01/2021 :
looks like crap coax anyway ....

The coax looks to be decent stuff, but very poorly installed. The antenna
seems not to have a ground plane.
looks like tv 75ohn coax to me

Looks much thicker to me..

On Sat, 30 Jan 2021 06:33:29 +1100, Fred, better known as cantankerous
trolling senile geezer Rodent Speed, wrote:


The top one doesn't need one.

ROTFLOL!!! Auto-contradicting senile pest!

--
Richard addressing senile Rodent Speed:
"**** you're thick/pathetic excuse for a troll."
MID:

On 29/01/2021 19:51, Harry Bloomfield wrote:
Jimmy Stewart wrote on 29/01/2021 :
On 29/01/2021 18:34, Harry Bloomfield wrote:
Jimmy Stewart ... wrote on 29/01/2021 :
looks like crap coax anyway ....

The coax looks to be decent stuff, but very poorly installed. The
antenna seems not to have a ground plane.
looks like tv 75ohn coax to me

Looks much thicker to me..
oh right

On 29/01/2021 16:54, R D S wrote:
https://drive.google.com/file/d/1Mdm...ew?usp=sharing


why do you want to know ..... ?

On 29/01/2021 22:14, Jimmy Stewart wrote:
On 29/01/2021 16:54, R D S wrote:
https://drive.google.com/file/d/1Mdm...ew?usp=sharing


why do you want to know ..... ?

Cos my wifi doesn't work properly!
Or my wireless keyboard and mouse.

I'm clutching at straws for possible causes.

R D S wrote:

Jimmy Stewart wrote:

R D S wrote:

https://drive.google.com/file/d/1Mdm...ew?usp=sharing

why do you want to know ..... ?

Cos my wifi doesn't work properly!

That's *way* bigger than a 2.4 or 5 GHz aerial.

On 29/01/2021 19:51, Harry Bloomfield wrote:
Jimmy Stewart wrote on 29/01/2021 :
On 29/01/2021 18:34, Harry Bloomfield wrote:
Jimmy Stewart ... wrote on 29/01/2021 :
looks like crap coax anyway ....

The coax looks to be decent stuff, but very poorly installed. The
antenna seems not to have a ground plane.
looks like tv 75ohn coax to me

Looks much thicker to me..

Yup, if you zoom into the photo, it's more than double the diameter of
the adjacent TV aerial coax attached to that bottom Yagi...

--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

On 29/01/2021 18:40, Jeff Layman wrote:
On 29/01/2021 18:11, S wrote:
On 29/01/2021 17:54, Jeff Layman wrote:
On 29/01/2021 16:54, R D S wrote:
https://drive.google.com/file/d/1Mdm...ew?usp=sharing



Dunno, but it looks like it would make a pretty good lightning
conductor.


a FM quarter wave end fed metal rod? Would be about 765 mm long....

? That aerial extends vertically perhaps 4 or 5 metres above the
chimney. I would be surprised if it isn't one of the highest points in
the street.

CB radio i'd say - ten four blah blah

--
Those who want slavery should have the grace to name it by its proper
name. They must face the full meaning of that which they are advocating
or condoning; the full, exact, specific meaning of collectivism, of its
logical implications, of the principles upon which it is based, and of
the ultimate consequences to which these principles will lead. They must
face it, then decide whether this is what they want or not.

Ayn Rand.

On 29/01/2021 22:36, R D S wrote:
On 29/01/2021 22:14, Jimmy Stewart wrote:
On 29/01/2021 16:54, R D S wrote:
https://drive.google.com/file/d/1Mdm...ew?usp=sharing


why do you want to know ..... ?

Cos my wifi doesn't work properly!
Or my wireless keyboard and mouse.

I'm clutching at straws for possible causes.

well they might well be on 27Mhz and that lad looks 27Mhz to me

I built a 5W 27Mhz tx in my youth. would collapse a TV picture at 50 feet


--
"Women actually are capable of being far more than the feminists will
let them."

On 29/01/2021 23:38, Andy Burns wrote:
R D S wrote:

Jimmy Stewart wrote:

R D S wrote:

https://drive.google.com/file/d/1Mdm...ew?usp=sharing


why do you want to know ..... ?

Cos my wifi doesn't work properly!

That's *way* bigger than a 2.4 or 5 GHz aerial.

but high rf fields can **** up all sorts of stuff

Most of my wifi problems have gone with the demise of my toshiba C50
laptop. ****ing broadcomm POS wifi chipset.

Invested in a SH HP probook. runs way faster and connects at 150Mbps and
stays connected.

And yesterday in went CAT5 to the kitchen TV and WAP point, and out went
the power over mains link. Reliability looms!


--
"Women actually are capable of being far more than the feminists will
let them."

On 29/01/2021 19:15, williamwright wrote:
On 29/01/2021 16:54, R D S wrote:
https://drive.google.com/file/d/1Mdm...ew?usp=sharing


The thing at the top could be a glass fibre colinear* for anything VHF
or UHF, including RSL VHF FM radio. Or it could be an old Aerialite AM
aerial (they had a coax feeder). Or anything really!

The mast and chimney brackets are very old. The corner plates have
almost rusted away. It looks as if an old mast and bracket pair has been
re-purposed, and lowered.

The two contract-quality UHF TV aerials are of different historic
channel groups; a Gp A and a Gp CD. The two TV aerial on the opposite
corner are the same, except that the top one has been replaced because
the boom on the top one snapped due to the U bolt hole being oversized.

If this is a shared chimney, the other corner belonging to the same
house as the tall aerial has what looks like a vertical dipole for
something or other, could be VHF FM but it looks a bit too long. There's
another aerial of some sort on the same fixing. These are much newer
than the tall mast (look at the corner plate nearest the camera).

*colinear: several dipoles in a stack, inside a shroud of some sort.
Gives a bit more gain than a single halfwave dipole.

Bill
can you not be more exact ? ...tee hee

R D S wrote:
On 29/01/2021 22:14, Jimmy Stewart wrote:
On 29/01/2021 16:54, R D S wrote:
https://drive.google.com/file/d/1Mdm...ew?usp=sharing


why do you want to know ..... ?

Cos my wifi doesn't work properly!
Or my wireless keyboard and mouse.

I'm clutching at straws for possible causes.

Disconnect the USB3 hard drive cabled to the
machine currently... then retest.

The problem can be an RF source, very close to
the affected items.

*******

USB3 operates at 5GHz, and shows broad emissions
at 2.4GHz and nothing at 5GHz. If you have dual
band Wifi, the 5GHz band would work, while the
2.4GHz band is a bit blotted out.

Figure 3-3 on the tenth page:

https://www.intel.com/content/www/us...nce-paper.html

The keyboard and mouse can use Bluetooth (2.4GHz)
or other variants at that frequency.

Another test case, is to have the keyboard and mouse
on one side of the machine, and move the USB3 cable
away to the other side of the machine, and see if
keyboard/mouse situation improves.

Many years ago, a few HID devices ran at 27MHz, but
that practice stopped a long time ago. You'd have to
go out of your way to search Ebay, to find something
that horrible today.

USB3 = 2.4GHz interference source (when active signals present)
USB2 = Does not affect computer operation, as near as
can be determined. If there are emissions, they do
not collide with "useful" spectrum.

USB4/Thunderbolt = unknown??? Not heard any stories yet.

Paul

Description would be nice?
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.!
"R D S" wrote in message
...
https://drive.google.com/file/d/1Mdm...ew?usp=sharing

I had to laugh the other day when a ham was describing his vhf aerial, He
said its basically a colinear for 2 and 70cms, its made by a company called
white stick but mine is green.
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.!
"Jeff Layman" wrote in message
...
On 29/01/2021 16:54, R D S wrote:
https://drive.google.com/file/d/1Mdm...ew?usp=sharing

Dunno, but it looks like it would make a pretty good lightning conductor.

--

Jeff

On 30/01/2021 09:48, Brian Gaff (Sofa) wrote:
Description would be nice?

Neighbour's chimney with a (approx) 4 metre mast with a 1 metre thin,
pointed antenna of some sort on the end of it.

Some of the old CB aerials were vertical with a ground plane quite often and
hams now adapt those for the 10 metre band as it only needs to be a little
shorter.
Often though its a colinear, as they do not need a ground plane.

I'd not worry about the height, very unlikely to get struck by lightning,
for many hears I had a 15ft mast on the chimney with a rotatable five
element fm aerial and a log periodic uhf TV array on top with a two stacked
b group uhf array looking at hannington itv transmitter when itv regions
actually showed different programmes. sob.
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.!
"Jeff Layman" wrote in message
...
On 29/01/2021 18:11, S wrote:
On 29/01/2021 17:54, Jeff Layman wrote:
On 29/01/2021 16:54, R D S wrote:
https://drive.google.com/file/d/1Mdm...ew?usp=sharing


Dunno, but it looks like it would make a pretty good lightning
conductor.


a FM quarter wave end fed metal rod? Would be about 765 mm long....

? That aerial extends vertically perhaps 4 or 5 metres above the chimney.
I would be surprised if it isn't one of the highest points in the street.

--

Jeff

That issue will have nothing to do with that aerial. Keep a log of when it
does not work, if its always then it will not be that. More likely somebody
next door has installed a wifi booster or mesh system and trashed the wifi
frequencies. As for wireless keyboards, do you have anything else that is
wireless nearby that can be turned off. At the frequencies these devices use
its far more likely to be something very close than anything else.
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.!
"Paul" wrote in message
...
R D S wrote:
On 29/01/2021 22:14, Jimmy Stewart wrote:
On 29/01/2021 16:54, R D S wrote:
https://drive.google.com/file/d/1Mdm...ew?usp=sharing

why do you want to know ..... ?

Cos my wifi doesn't work properly!
Or my wireless keyboard and mouse.

I'm clutching at straws for possible causes.

Disconnect the USB3 hard drive cabled to the
machine currently... then retest.

The problem can be an RF source, very close to
the affected items.

*******

USB3 operates at 5GHz, and shows broad emissions
at 2.4GHz and nothing at 5GHz. If you have dual
band Wifi, the 5GHz band would work, while the
2.4GHz band is a bit blotted out.

Figure 3-3 on the tenth page:

https://www.intel.com/content/www/us...nce-paper.html

The keyboard and mouse can use Bluetooth (2.4GHz)
or other variants at that frequency.

Another test case, is to have the keyboard and mouse
on one side of the machine, and move the USB3 cable
away to the other side of the machine, and see if
keyboard/mouse situation improves.

Many years ago, a few HID devices ran at 27MHz, but
that practice stopped a long time ago. You'd have to
go out of your way to search Ebay, to find something
that horrible today.

USB3 = 2.4GHz interference source (when active signals present)
USB2 = Does not affect computer operation, as near as
can be determined. If there are emissions, they do
not collide with "useful" spectrum.

USB4/Thunderbolt = unknown??? Not heard any stories yet.

Paul

Brian Gaff (Sofa) wrote:
That issue will have nothing to do with that aerial. Keep a log of when it
does not work, if its always then it will not be that. More likely somebody
next door has installed a wifi booster or mesh system and trashed the wifi
frequencies. As for wireless keyboards, do you have anything else that is
wireless nearby that can be turned off. At the frequencies these devices use
its far more likely to be something very close than anything else.
Brian


Unfortunately, USB3 has wiped out Wifi (2.4GHz) operation.

That's why Intel wrote the whitepaper (link) I quoted.
So you'd be aware of yet another potential interference source.

Paul

Brian Gaff (Sofa) wrote:
Description would be nice?
Brian


It's around (4) log periodic or Yagi antennas
pointed on a common vector.

And these are not conventional wide-band UHF, three
of them look to be cut at a specific frequency. The
fourth has some slight log-spacing to it. Dipoles are all
the same length.

There are two verticals, attached to the top of the
mast poles. They're unloaded. While they could be
lightning arrestors, they have no spikey bit for
generating corona and "attracting" the lightning.

If you tipped the letter "F" upside-down, the two
arms of the F would represent the Yagi style antennas.
The leg of the F (upside-down) would be the mast and
vertical antenna orientation.

That's not all there is to see, but is some broad
brush strokes of a picture. There's a roof and a chimney,
and the chimney provides the mounting support.

Paul

Paul was thinking very hard :
It's around (4) log periodic or Yagi antennas
pointed on a common vector.

They look as if they are probably fringe area TV yagi, all vertically
polarised - probably feeding individual TV's, though less likely they
might be set up as one antenna system, to try boost reception.


And these are not conventional wide-band UHF, three
of them look to be cut at a specific frequency. The
fourth has some slight log-spacing to it. Dipoles are all
the same length.

You are maybe seeing distortions of the photo/ different antenna
brands.


There are two verticals, attached to the top of the
mast poles. They're unloaded. While they could be
lightning arrestors, they have no spikey bit for
generating corona and "attracting" the lightning.

At the back of the chimney - They look like remnants of old 1950's 405
line antennas to me. You can see part of the X of a 405 line antenna,
peeping out from behind the chimney. The dipole of which, could be 405
line TV, or maybe an FM radio antenna.

The nearer vertical, with the much thicker feeder, could be anything at
all. Whoever installed it, went to an awful lot of trouble, to extend
the mast by a relatively small amount with a joiner clamp.

The actual antenna appears to be a white composite covered and also
appears to taper from bottom to top.


If you tipped the letter "F" upside-down, the two
arms of the F would represent the Yagi style antennas.
The leg of the F (upside-down) would be the mast and
vertical antenna orientation.

That's not all there is to see, but is some broad
brush strokes of a picture. There's a roof and a chimney,
and the chimney provides the mounting support.

On 30/01/2021 09:51, Brian Gaff (Sofa) wrote:
I had to laugh the other day when a ham was describing his vhf aerial, He
said its basically a colinear for 2 and 70cms, its made by a company called
white stick but mine is green.
Brian

better with a J Pole

On 30/01/2021 09:57, Brian Gaff (Sofa) wrote:
Some of the old CB aerials were vertical with a ground plane quite often and
hams now adapt those for the 10 metre band as it only needs to be a little
shorter.
Often though its a colinear, as they do not need a ground plane.

I'd not worry about the height, very unlikely to get struck by lightning,
for many hears I had a 15ft mast on the chimney with a rotatable five
element fm aerial and a log periodic uhf TV array on top with a two stacked
b group uhf array looking at hannington itv transmitter when itv regions
actually showed different programmes. sob.
Brian


Yes, I suggested that it could be a CB antenna yesterday. 5/8 wavelength
base loaded verticals were very popular and had a good horizontal
radiation pattern.

They were/are illegal of course to transmit using them but no one was
ever prosecuted and told to take down.

On 30/01/2021 13:11, Jimmy Stewart ... wrote:
On 30/01/2021 09:51, Brian Gaff (Sofa) wrote:
I had to laugh the other day when a ham was describing his vhf aerial, He
said its basically a colinear for 2 and 70cms, its made by a company
called
white stick but mine is green.
Â* Brian

better with a J Pole
mine has a good swr on 430 Mc/s as well as 2m......great things NanoVna's

On Sat, 30 Jan 2021 05:02:45 +0000, The Natural Philosopher
wrote:

Those who want slavery should have the grace to name it by its proper
name. They must face the full meaning of that which they are advocating
or condoning; the full, exact, specific meaning of collectivism, of its
logical implications, of the principles upon which it is based, and of
the ultimate consequences to which these principles will lead. They must
face it, then decide whether this is what they want or not.

Ayn Rand.

How ironic, then, that this libertarian icon should spend her last
days a dependant of "social security" and "socialized medicine". You
couldn't make it up.

On 30/01/2021 05:02, The Natural Philosopher wrote:
On 29/01/2021 18:40, Jeff Layman wrote:
On 29/01/2021 18:11, S wrote:
On 29/01/2021 17:54, Jeff Layman wrote:
On 29/01/2021 16:54, R D S wrote:
https://drive.google.com/file/d/1Mdm...ew?usp=sharing



Dunno, but it looks like it would make a pretty good lightning
conductor.


a FM quarter wave end fed metal rod? Would be about 765 mm long....

? That aerial extends vertically perhaps 4 or 5 metres above the
chimney. I would be surprised if it isn't one of the highest points in
the street.

CB radio i'd say -Â* ten four blah blah

no

Brian Gaff (Sofa)

Description would be nice?

Its 4 yagis and one vertical above
the lot, all on a brick chimney.

"R D S" wrote in message
...
https://drive.google.com/file/d/1Mdm...ew?usp=sharing

On Sun, 31 Jan 2021 06:47:13 +1100, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again:

FLUSH troll**** unread

--
dennis@home to know-it-all Rodent Speed:
"You really should stop commenting on things you know nothing about."
Message-ID:

On 30/01/2021 17:07, Custos Custodum wrote:
On Sat, 30 Jan 2021 05:02:45 +0000, The Natural Philosopher
wrote:

Those who want slavery should have the grace to name it by its proper
name. They must face the full meaning of that which they are advocating
or condoning; the full, exact, specific meaning of collectivism, of its
logical implications, of the principles upon which it is based, and of
the ultimate consequences to which these principles will lead. They must
face it, then decide whether this is what they want or not.

Ayn Rand.

How ironic, then, that this libertarian icon should spend her last
days a dependant of "social security" and "socialized medicine". You
couldn't make it up.

But you apparently, can...
if you cant attack the message, always attack the messenger;





--
€œIt is hard to imagine a more stupid decision or more dangerous way of
making decisions than by putting those decisions in the hands of people
who pay no price for being wrong.€�

Thomas Sowell