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Default Lightning strike.

On another group, I heard about a lightning strike to a house, via the TV
aerial. Aerial went to a DA. Seemed it burnt out all the house wiring and
every appliance in it. Requiring the owners to move out for months while
it was all sorted. Seems it also travelled to other houses in the street
too via the mains and caused much damage there too. Was rather surprised
to read this. I've seen a TV destroyed - but not so much extra damage.

--
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Dave Plowman London SW
To e-mail, change noise into sound.
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Default Lightning strike.

On 05/04/2021 16:15, Dave Plowman (News) wrote:
On another group, I heard about a lightning strike to a house, via the TV
aerial. Aerial went to a DA. Seemed it burnt out all the house wiring and
every appliance in it. Requiring the owners to move out for months while
it was all sorted. Seems it also travelled to other houses in the street
too via the mains and caused much damage there too. Was rather surprised
to read this. I've seen a TV destroyed - but not so much extra damage.


When did this happen?
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Default Lightning strike.

On 05/04/2021 16:20, Richard wrote:
On 05/04/2021 16:15, Dave Plowman (News) wrote:
On another group, I heard about a lightning strike to a house, via the TV
aerial. Aerial went to a DA. Seemed it burnt out all the house wiring and
every appliance in it. Requiring the owners to move out for months while
it was all sorted. Seems it also travelled to other houses in the street
too via the mains and caused much damage there too. Was rather surprised
to read this. I've seen a TV destroyed - but not so much extra damage.


When did this happen?


Or where?

--
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Default Lightning strike.

On 05/04/2021 16:15, Dave Plowman (News) wrote:
On another group, I heard about a lightning strike to a house, via the TV
aerial. Aerial went to a DA. Seemed it burnt out all the house wiring and
every appliance in it. Requiring the owners to move out for months while
it was all sorted. Seems it also travelled to other houses in the street
too via the mains and caused much damage there too. Was rather surprised
to read this. I've seen a TV destroyed - but not so much extra damage.

you have never seen brickwork blown apart then ? .....
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Default Lightning strike.

On 05/04/2021 16:24, ARW wrote:
On 05/04/2021 16:20, Richard wrote:
On 05/04/2021 16:15, Dave Plowman (News) wrote:
On another group, I heard about a lightning strike to a house, via
the TV
aerial. Aerial went to a DA. Seemed it burnt out all the house wiring
and
every appliance in it. Requiring the owners to move out for months while
it was all sorted. Seems it also travelled to other houses in the street
too via the mains and caused much damage there too. Was rather surprised
to read this. I've seen a TV destroyed - but not so much extra damage.


When did this happen?


Or where?

I had a direct strike on a phone line that blew sockets out of the wall,
required a full rewire or insurance wouldn't pay, took out modem,
serial parallel card, printer, TV, and record deck. And burnt a few
holes in a carpet.

Cooker was OK tho

--
"When one man dies it's a tragedy. When thousands die it's statistics."

Josef Stalin



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Default Lightning strike.

Well although it may have fried the aerial, its likely that it struck
through the roof and may well have struck more than one house. Lightning is
not tidy, its a bit like a teenager and has bits all over the place. Having
been near to two strikes in my life, it struck the roof of a factory, and
although it was plastered in lightning conductors, all the wiring was ruined
and all the computers and devices in the factory that were electrically
driven suffered some damage as well.
In a field near a pylon it struck the pylon, but it also struck the ground
all around it leaving the grass sizzling for some seconds afterwards. I and
the dog both layed down as soon as I felt the tell tale prickling of a high
voltage, but the hot blast and the noise, no wonder I have tinnitus.


I heard on the radio the other day that scientists are still not sure what
it is that triggers the sudden breakdown and a discharge. Fingers are
pointing at high energy cosmic rays from deep space apparently, which ionise
the air just enough to allow the discharge.
Brian

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"Dave Plowman (News)" wrote in message
...
On another group, I heard about a lightning strike to a house, via the TV
aerial. Aerial went to a DA. Seemed it burnt out all the house wiring and
every appliance in it. Requiring the owners to move out for months while
it was all sorted. Seems it also travelled to other houses in the street
too via the mains and caused much damage there too. Was rather surprised
to read this. I've seen a TV destroyed - but not so much extra damage.

--
*Never miss a good chance to shut up *

Dave Plowman
London SW
To e-mail, change noise into sound.



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Default Lightning strike.

On 05/04/2021 16:15, Dave Plowman (News) wrote:
On another group, I heard about a lightning strike to a house, via the TV
aerial. Aerial went to a DA. Seemed it burnt out all the house wiring and
every appliance in it. Requiring the owners to move out for months while
it was all sorted. Seems it also travelled to other houses in the street
too via the mains and caused much damage there too. Was rather surprised
to read this. I've seen a TV destroyed - but not so much extra damage.



I was reading about why there are so many more lightning deaths in some
countries than others. One reason is because of plumbing. The lightning
finds the easiest route to earth, which is through the plumbing and
electrics, rather than the people.


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Default Lightning strike.

On 05/04/2021 16:31, The Natural Philosopher wrote:
On 05/04/2021 16:24, ARW wrote:
On 05/04/2021 16:20, Richard wrote:
On 05/04/2021 16:15, Dave Plowman (News) wrote:
On another group, I heard about a lightning strike to a house, via
the TV
aerial. Aerial went to a DA. Seemed it burnt out all the house
wiring and
every appliance in it. Requiring the owners to move out for months
while
it was all sorted. Seems it also travelled to other houses in the
street
too via the mains and caused much damage there too. Was rather
surprised
to read this. I've seen a TV destroyed - but not so much extra damage.


When did this happen?


Or where?

I had a direct strike on a phone line that blew sockets out of the wall,
required a full rewire or insurance wouldn't pay, took out¬* modem,
serial parallel card, printer, TV, and record deck. And burnt a few
holes in a carpet.

Cooker was OK tho


Fascinating.
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Default Lightning strike.

In article ,
Dave Plowman (News) wrote:
On another group, I heard about a lightning strike to a house, via the TV
aerial. Aerial went to a DA. Seemed it burnt out all the house wiring and
every appliance in it. Requiring the owners to move out for months while
it was all sorted. Seems it also travelled to other houses in the street
too via the mains and caused much damage there too. Was rather surprised
to read this. I've seen a TV destroyed - but not so much extra damage.


I doubt if a strike to a tv aerial would travel outside the preises struck.
More likely an overhead line was struck and got into other houses that way.

--
from KT24 in Surrey, England
"I'd rather die of exhaustion than die of boredom" Thomas Carlyle
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Default Lightning strike.

On 05/04/2021 16:34, GB wrote:
On 05/04/2021 16:15, Dave Plowman (News) wrote:
On another group, I heard about a lightning strike to a house, via the TV
aerial. Aerial went to a DA. Seemed it burnt out all the house wiring and
every appliance in it. Requiring the owners to move out for months while
it was all sorted. Seems it also travelled to other houses in the street
too via the mains and caused much damage there too. Was rather surprised
to read this. I've seen a TV destroyed - but not so much extra damage.



I was reading about why there are so many more lightning deaths in some
countries than others. One reason is because of plumbing. The lightning
finds the easiest route to earth, which is through the plumbing and
electrics, rather than the people.


I know someone that was thrown across the room and the kitchen sink
blown off the wall, when a nearby ground strike travelled into the house
via the pipes!



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Default Lightning strike.

Dave Plowman (News) wrote

On another group, I heard about a lightning strike to a house, via the TV
aerial. Aerial went to a DA. Seemed it burnt out all the house wiring and
every appliance in it. Requiring the owners to move out for months while
it was all sorted. Seems it also travelled to other houses in the street
too via the mains and caused much damage there too. Was rather surprised
to read this. I've seen a TV destroyed - but not so much extra damage.


Bet that story is utterly mangled. Cant see how a lightning
strike can take out all the house wiring unless itís a very simple
and small house wiring in which case it cant take months to
fix unless there is a severe labor shortage in that area etc.

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Default Lightning strike.



"Jim GM4DHJ ..." wrote in message
...
On 05/04/2021 16:15, Dave Plowman (News) wrote:
On another group, I heard about a lightning strike to a house, via the TV
aerial. Aerial went to a DA. Seemed it burnt out all the house wiring and
every appliance in it. Requiring the owners to move out for months while
it was all sorted. Seems it also travelled to other houses in the street
too via the mains and caused much damage there too. Was rather surprised
to read this. I've seen a TV destroyed - but not so much extra damage.


you have never seen brickwork blown apart then ? .....


Thats different to all the house wiring. Dont believe it.

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Default Lightning strike.

On Mon, 05 Apr 2021 16:15:40 +0100, "Dave Plowman (News)"
wrote:

On another group, I heard about a lightning strike to a house, via the TV
aerial. Aerial went to a DA. Seemed it burnt out all the house wiring and
every appliance in it. Requiring the owners to move out for months while
it was all sorted. Seems it also travelled to other houses in the street
too via the mains and caused much damage there too. Was rather surprised
to read this. I've seen a TV destroyed - but not so much extra damage.


The house diagonally opposite to my Mums was hit with lightening and
it blew the cast iron fireplace out of the hearth and onto the carpet,
which then started to catch fire. I can remember seeing the fire
engine turn up and the firemen throwing the fireplace out of the sash
window and onto the pavement (as it must have still been very hot).

Powerful stuff.

Cheers, T i m
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Default Lightning strike.

On 05/04/2021 20:43, Jethro_uk wrote:
On Mon, 05 Apr 2021 18:17:41 +0100, Steve Walker wrote:

On 05/04/2021 16:34, GB wrote:

I know someone that was thrown across the room and the kitchen sink
blown off the wall, when a nearby ground strike travelled into the house
via the pipes!


Aren't cows regularly killed by strikes ? The distance between front and
rear legs being enough to create a fatal potential difference ?


Gives me an idea for a nice cottage industry, selling rubber boots for cows.

Three per cow? or four?

--
Adrian C
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Default Lightning strike.

On 05/04/2021 20:56, Adrian Caspersz wrote:
On 05/04/2021 20:43, Jethro_uk wrote:
On Mon, 05 Apr 2021 18:17:41 +0100, Steve Walker wrote:

On 05/04/2021 16:34, GB wrote:

I know someone that was thrown across the room and the kitchen sink
blown off the wall, when a nearby ground strike travelled into the house
via the pipes!


Aren't cows regularly killed by strikes ? The distance between front and
rear legs being enough to create a fatal potential difference ?


Gives me an idea for a nice cottage industry, selling rubber boots for
cows.

Three per cow? or four?


Four - then you have redundancy in case one becomes damaged or lost. You
know what it's like walking in mud, getting your wellies stuck and
walking out of one


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"Jethro_uk" wrote in message
...
On Mon, 05 Apr 2021 18:17:41 +0100, Steve Walker wrote:

On 05/04/2021 16:34, GB wrote:
On 05/04/2021 16:15, Dave Plowman (News) wrote:
On another group, I heard about a lightning strike to a house, via the
TV aerial. Aerial went to a DA. Seemed it burnt out all the house
wiring and every appliance in it. Requiring the owners to move out for
months while it was all sorted. Seems it also travelled to other
houses in the street too via the mains and caused much damage there
too. Was rather surprised to read this. I've seen a TV destroyed - but
not so much extra damage.



I was reading about why there are so many more lightning deaths in some
countries than others. One reason is because of plumbing. The lightning
finds the easiest route to earth, which is through the plumbing and
electrics, rather than the people.


I know someone that was thrown across the room and the kitchen sink
blown off the wall, when a nearby ground strike travelled into the house
via the pipes!


Aren't cows regularly killed by strikes ?


Not just cows, horses etc too.

The distance between front and rear legs being
enough to create a fatal potential difference ?


More current thru the heart, yep.

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"Adrian Caspersz" wrote in message
...
On 05/04/2021 20:43, Jethro_uk wrote:
On Mon, 05 Apr 2021 18:17:41 +0100, Steve Walker wrote:

On 05/04/2021 16:34, GB wrote:

I know someone that was thrown across the room and the kitchen sink
blown off the wall, when a nearby ground strike travelled into the house
via the pipes!


Aren't cows regularly killed by strikes ? The distance between front and
rear legs being enough to create a fatal potential difference ?


Gives me an idea for a nice cottage industry, selling rubber boots for
cows.


NZers have been doing it for sheep for centurys now.

The sheep ****er wears the boots, jams the sheep's back legs
into the boots so it cant get away when its being ****ed.

Three per cow? or four?



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Default Lightning strike.

On 05/04/2021 16:34, Brian Gaff (Sofa) wrote:
I and
the dog both layed down as soon as I felt the tell tale prickling of a high
voltage, but the hot blast and the noise, no wonder I have tinnitus.


You got lucky.

Lightning kills cows because when they _aren't_ hit there can be
significant voltage between the front and back legs.

Andy
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Default Lightning strike.

On 05/04/2021 16:24, ARW wrote:
On 05/04/2021 16:20, Richard wrote:
On 05/04/2021 16:15, Dave Plowman (News) wrote:
On another group, I heard about a lightning strike to a house, via
the TV
aerial. Aerial went to a DA. Seemed it burnt out all the house wiring
and
every appliance in it. Requiring the owners to move out for months while
it was all sorted. Seems it also travelled to other houses in the street
too via the mains and caused much damage there too. Was rather surprised
to read this. I've seen a TV destroyed - but not so much extra damage.


When did this happen?


Or where?


South AFrica, Brazil, India , ??
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Default Lightning strike.

On 05/04/2021 17:34, Richard wrote:
On 05/04/2021 16:31, The Natural Philosopher wrote:
On 05/04/2021 16:24, ARW wrote:
On 05/04/2021 16:20, Richard wrote:
On 05/04/2021 16:15, Dave Plowman (News) wrote:
On another group, I heard about a lightning strike to a house, via
the TV
aerial. Aerial went to a DA. Seemed it burnt out all the house
wiring and
every appliance in it. Requiring the owners to move out for months
while
it was all sorted. Seems it also travelled to other houses in the
street
too via the mains and caused much damage there too. Was rather
surprised
to read this. I've seen a TV destroyed - but not so much extra damage.


When did this happen?

Or where?

I had a direct strike on a phone line that blew sockets out of the
wall, required a full rewire or insurance wouldn't pay, took out
modem, serial parallel card, printer, TV, and record deck. And burnt a
few holes in a carpet.

Cooker was OK tho


Fascinating.


Toast nicely done, without using any power ?


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Default Lightning strike.

On 05/04/2021 17:14, Tim Streater wrote:
On 05 Apr 2021 at 16:34:17 BST, "Brian Gaff \ Sofa\)"
wrote:

I heard on the radio the other day that scientists are still not sure what
it is that triggers the sudden breakdown and a discharge. Fingers are
pointing at high energy cosmic rays from deep space apparently, which ionise
the air just enough to allow the discharge.


That's entirely possible. There's no shortage of cosmic rays.


At the poles. The earths magnetic fields keep (?most of) them away from
the rest of us.
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Default Lightning strike.

On 05/04/2021 22:46, Tim Streater wrote:

Aren't cows regularly killed by strikes ? The distance between front and
rear legs being enough to create a fatal potential difference ?

You mean like that Dobbin that pegged it at Newmarket a few years back because
he walked across a buried but leaky HT cable?

It was Newbury, but yes
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Default Lightning strike.

On 06/04/2021 08:29, Tim Streater wrote:
On 05 Apr 2021 at 23:31:30 BST, Andrew
wrote:

On 05/04/2021 17:14, Tim Streater wrote:
On 05 Apr 2021 at 16:34:17 BST, "Brian Gaff \ Sofa\)"
wrote:

I heard on the radio the other day that scientists are still not sure what
it is that triggers the sudden breakdown and a discharge. Fingers are
pointing at high energy cosmic rays from deep space apparently, which ionise
the air just enough to allow the discharge.

That's entirely possible. There's no shortage of cosmic rays.


At the poles. The earths magnetic fields keep (?most of) them away from
the rest of us.


You're thinking of solar wind particles. High energy cosmic rays are millions
of times more energetic than those, and are not deflected significantly by the
Earthe's magnetic field. Most biff into an atmosphere molecule at some
altitude and produce showers of secondaries, many of which reach Earth.


Different definitions? "Cosmic rays" covers an enormous range of
energies and sources, from solar eruptions through supernovae to more
exotic sources (of which I know nought). The ultra-high energy laugh at
the Earth's magnetic field but the overall flux does vary with latitude.

--
Robin
reply-to address is (intended to be) valid
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Default Lightning strike.

On 05/04/2021 16:15, Dave Plowman (News) wrote:
On another group, I heard about a lightning strike to a house, via the TV
aerial. Aerial went to a DA. Seemed it burnt out all the house wiring and
every appliance in it. Requiring the owners to move out for months while
it was all sorted. Seems it also travelled to other houses in the street
too via the mains and caused much damage there too. Was rather surprised
to read this. I've seen a TV destroyed - but not so much extra damage.


It seems quite unlikely. Our VH has taken the odd hit and whilst it
takes out the mains for a while the emergency lights survive OK.

A building I was in at work took a big direct hit that found its way
into the internal telephone network deafening the lady on the
switchboard who was unconsolable afterwards (as in it took about a day
to recover her hearing) .

Vapourised the phone cabling in the trunking leaving nasty black marks
on the wall. We felt very aggrieved that the strike hit our apex rather
than the much higher supergrid pylon 100m away. Capricious stuff is
lightning. It was one of those big industrial sheds with a metal roof.

Induced currents blew out some of the more delicate parts of the
mainframe interface boards whilst the surge suppressors saved themselves
by allowing other more delicate (ie. expensive) components to fry.

Once the damage was assessed we were back on mains power fairly quickly.
Emergency diesel generator cut in for critical systems as the mains went
down. Smelly noisy thing but at least it worked on the day! Internal
phone system was down for most of a week - complete rewire needed.

I have had modems killed by close lightning strikes but that is about
it. You can't rule it out but it must be very unlikely. Most times the
UPS or emergency backup power maintains full operation.

You would have to be very unlucky for it to damage mains wiring but if
it does then the huge currents involved can be very destructive.

--
Regards,
Martin Brown
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Default Lightning strike.

On Monday, 5 April 2021 at 16:16:30 UTC+1, Dave Plowman (News) wrote:
On another group, I heard about a lightning strike to a house, via the TV
aerial. Aerial went to a DA. Seemed it burnt out all the house wiring and
every appliance in it. Requiring the owners to move out for months while
it was all sorted. Seems it also travelled to other houses in the street
too via the mains and caused much damage there too. Was rather surprised
to read this. I've seen a TV destroyed - but not so much extra damage.

--
*Never miss a good chance to shut up *

Dave Plowman London SW
To e-mail, change noise into sound.


A friend had a similar lightning strike but not sure if it was via the TV aerial
which was damaged the connector was blown off and the pin ended up about 3ft away
and it was hot so burnt the carpet.
About 6 or so other peolpe were affected but it seems that the bolt hit a virgin media it a cable box
in the street. Most of the TiVo went faulty my friends the HDHI lead soldered itself into the cable box.
The lightning took out their TV , DVD player, cable box and seemed to have damaged the bluetooth in their iMac
as it was no longer found , but why it didn;t do the iMac too I don't know

I have some pictures I took of the damaged equipment somewhere , I'll try to find them tonight if I remmeber




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Default Lightning strike.

In article ,
Martin Brown wrote:
On 05/04/2021 16:15, Dave Plowman (News) wrote:
On another group, I heard about a lightning strike to a house, via the
TV aerial. Aerial went to a DA. Seemed it burnt out all the house
wiring and every appliance in it. Requiring the owners to move out for
months while it was all sorted. Seems it also travelled to other
houses in the street too via the mains and caused much damage there
too. Was rather surprised to read this. I've seen a TV destroyed - but
not so much extra damage.


It seems quite unlikely. Our VH has taken the odd hit and whilst it
takes out the mains for a while the emergency lights survive OK.


A building I was in at work took a big direct hit that found its way
into the internal telephone network deafening the lady on the
switchboard who was unconsolable afterwards (as in it took about a day
to recover her hearing) .


Vapourised the phone cabling in the trunking leaving nasty black marks
on the wall. We felt very aggrieved that the strike hit our apex rather
than the much higher supergrid pylon 100m away. Capricious stuff is
lightning. It was one of those big industrial sheds with a metal roof.


Induced currents blew out some of the more delicate parts of the
mainframe interface boards whilst the surge suppressors saved themselves
by allowing other more delicate (ie. expensive) components to fry.


Once the damage was assessed we were back on mains power fairly quickly.
Emergency diesel generator cut in for critical systems as the mains went
down. Smelly noisy thing but at least it worked on the day! Internal
phone system was down for most of a week - complete rewire needed.


I have had modems killed by close lightning strikes but that is about
it. You can't rule it out but it must be very unlikely. Most times the
UPS or emergency backup power maintains full operation.


You would have to be very unlucky for it to damage mains wiring but if
it does then the huge currents involved can be very destructive.


Yes - I can readily see all that happening. But the story teller was very
definite about it being a TV aerial strike. And that being on a DA. Which
then jumped into the mains and destroyed all of that. And in a couple of
neighbouring houses too.

I'd have expected a major strike to have cause a fire, or structural
damage first.

--
*I'm not as think as you drunk I am.

Dave Plowman London SW
To e-mail, change noise into sound.
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Lucky I have only two then.

It was instinctive, no thought involved I can tell you, no time for that. I
imagine it was because it was raining torrentially at the time.

This was some years back. Two close calls are enough for one life I feel,
but one day I guess you run out of luck.

I do live on the top of a hill.
Brian

--

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Blind user, so no pictures please
Note this Signature is meaningless.!
"Vir Campestris" wrote in message
...
On 05/04/2021 16:34, Brian Gaff (Sofa) wrote:
I and
the dog both layed down as soon as I felt the tell tale prickling of a
high
voltage, but the hot blast and the noise, no wonder I have tinnitus.


You got lucky.

Lightning kills cows because when they _aren't_ hit there can be
significant voltage between the front and back legs.

Andy



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So who is going to design a cosmic ray detector we can build ourselves in
the garden?
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.!
"Robin" wrote in message
...
On 06/04/2021 08:29, Tim Streater wrote:
On 05 Apr 2021 at 23:31:30 BST, Andrew
wrote:

On 05/04/2021 17:14, Tim Streater wrote:
On 05 Apr 2021 at 16:34:17 BST, "Brian Gaff \ Sofa\)"
wrote:

I heard on the radio the other day that scientists are still not
sure what
it is that triggers the sudden breakdown and a discharge. Fingers
are
pointing at high energy cosmic rays from deep space apparently,
which ionise
the air just enough to allow the discharge.
That's entirely possible. There's no shortage of cosmic rays.


At the poles. The earths magnetic fields keep (?most of) them away from
the rest of us.


You're thinking of solar wind particles. High energy cosmic rays are
millions
of times more energetic than those, and are not deflected significantly
by the
Earthe's magnetic field. Most biff into an atmosphere molecule at some
altitude and produce showers of secondaries, many of which reach Earth.


Different definitions? "Cosmic rays" covers an enormous range of energies
and sources, from solar eruptions through supernovae to more exotic
sources (of which I know nought). The ultra-high energy laugh at the
Earth's magnetic field but the overall flux does vary with latitude.

--
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reply-to address is (intended to be) valid



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Default Lightning strike.

I tell you what ask somebody who lives in one of the Welsh villages that
used to be near collieries and see what answer you get!
I used to work for a tv repair company and the state of some of the pcbs
was terrible big charred holes etc, and these were valve sets, and they
often survived better than a modern one would.
Brian

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The Sofa of Brian Gaff...

Blind user, so no pictures please
Note this Signature is meaningless.!
"whisky-dave" wrote in message
...
On Monday, 5 April 2021 at 16:16:30 UTC+1, Dave Plowman (News) wrote:
On another group, I heard about a lightning strike to a house, via the TV
aerial. Aerial went to a DA. Seemed it burnt out all the house wiring and
every appliance in it. Requiring the owners to move out for months while
it was all sorted. Seems it also travelled to other houses in the street
too via the mains and caused much damage there too. Was rather surprised
to read this. I've seen a TV destroyed - but not so much extra damage.

--
*Never miss a good chance to shut up *

Dave Plowman London SW
To e-mail, change noise into sound.


A friend had a similar lightning strike but not sure if it was via the TV
aerial
which was damaged the connector was blown off and the pin ended up about
3ft away
and it was hot so burnt the carpet.
About 6 or so other peolpe were affected but it seems that the bolt hit a
virgin media it a cable box
in the street. Most of the TiVo went faulty my friends the HDHI lead
soldered itself into the cable box.
The lightning took out their TV , DVD player, cable box and seemed to have
damaged the bluetooth in their iMac
as it was no longer found , but why it didn;t do the iMac too I don't know

I have some pictures I took of the damaged equipment somewhere , I'll try
to find them tonight if I remmeber




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Default Lightning strike.

Sorry Brian, my ignorance of electronics is so near to immaculate I
can't help with one for you. But for sighted people it can be easily
with a DIY cloud chamber if you can buy dry ice and isopropyl alcohol.
Video at CERN link below.

I've read of people doing it without dry ice by evaporative cooling but
can't speak to that.

https://home.cern/news/news/experime...-cloud-chamber



On 06/04/2021 15:45, Brian Gaff (Sofa) wrote:
So who is going to design a cosmic ray detector we can build ourselves in
the garden?
Brian



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reply-to address is (intended to be) valid


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Default Lightning strike.



"Dave Plowman (News)" wrote in message
...
In article ,
Martin Brown wrote:
On 05/04/2021 16:15, Dave Plowman (News) wrote:
On another group, I heard about a lightning strike to a house, via the
TV aerial. Aerial went to a DA. Seemed it burnt out all the house
wiring and every appliance in it. Requiring the owners to move out for
months while it was all sorted. Seems it also travelled to other
houses in the street too via the mains and caused much damage there
too. Was rather surprised to read this. I've seen a TV destroyed - but
not so much extra damage.


It seems quite unlikely. Our VH has taken the odd hit and whilst it
takes out the mains for a while the emergency lights survive OK.


A building I was in at work took a big direct hit that found its way
into the internal telephone network deafening the lady on the
switchboard who was unconsolable afterwards (as in it took about a day
to recover her hearing) .


Vapourised the phone cabling in the trunking leaving nasty black marks
on the wall. We felt very aggrieved that the strike hit our apex rather
than the much higher supergrid pylon 100m away. Capricious stuff is
lightning. It was one of those big industrial sheds with a metal roof.


Induced currents blew out some of the more delicate parts of the
mainframe interface boards whilst the surge suppressors saved themselves
by allowing other more delicate (ie. expensive) components to fry.


Once the damage was assessed we were back on mains power fairly quickly.
Emergency diesel generator cut in for critical systems as the mains went
down. Smelly noisy thing but at least it worked on the day! Internal
phone system was down for most of a week - complete rewire needed.


I have had modems killed by close lightning strikes but that is about
it. You can't rule it out but it must be very unlikely. Most times the
UPS or emergency backup power maintains full operation.


You would have to be very unlucky for it to damage mains wiring but if
it does then the huge currents involved can be very destructive.


Yes - I can readily see all that happening. But the story teller was very
definite about it being a TV aerial strike. And that being on a DA. Which
then jumped into the mains and destroyed all of that. And in a couple of
neighbouring houses too.

I'd have expected a major strike to have cause a fire,


Thatís actually quite rare except when it strikes a tree.

or structural damage first.


Thatís even rarer.

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Default More Heavy Trolling by Senile Nym-Shifting Rodent Speed!

On Wed, 7 Apr 2021 04:42:08 +1000, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again:


ThatĘs even rarer.


Not as rare as you are a rare senile idiot, senile troll!

--
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Default Lightning strike.

On 06/04/2021 14:33, Dave Plowman (News) wrote:
But the story teller was very
definite about it being a TV aerial strike.


You often can't tell whether the lightning hit the aerial or the nearby
masonry. I've been to a lot of these.

Bill
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Default Lightning strike.

On 06/04/2021 19:42, Rod Speed wrote:
or structural damage first.


Thatís even rarer.


A strike on a building or its aerial usually causes some structural damage.

Bill
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Default Lightning strike.



"williamwright" wrote in message
...
On 06/04/2021 19:42, Rod Speed wrote:
or structural damage first.


Thatís even rarer.


A strike on a building or its aerial usually causes some structural
damage.


Depends on what you call structural damage. Burns, sure, but
only rarely damage that risks the integrity of the building unless
it sets fire to the building which isnt that common.



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Default Lightning strike.



"Rod Speed" wrote in message
...


"williamwright" wrote in message
...
On 06/04/2021 19:42, Rod Speed wrote:
or structural damage first.

Thatís even rarer.


A strike on a building or its aerial usually causes some structural
damage.


Depends on what you call structural damage. Burns, sure, but
only rarely damage that risks the integrity of the building unless
it sets fire to the building which isnt that common.


Tho I spose it would be more common on that soggy
little sodden island with so much of the building sodden
so that a high current can instantly cause the water to
explode and blow bits of masonry etc off.

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Default More Heavy Trolling by the Octogenarian Nym-Shifting Ozzie Cretin!

On Wed, 7 Apr 2021 13:15:59 +1000, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again:



A strike on a building or its aerial usually causes some structural
damage.


Depends on what you call structural damage. Burns, sure, but
only rarely damage that risks the integrity of the building unless
it sets fire to the building which isnt that common.


You just HAVE to auto-contradict, you subnormal sociopathic senile cretin!
LMAO

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MID:
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Default Lightning strike.

On Tuesday, 6 April 2021 at 14:35:36 UTC+1, Dave Plowman (News) wrote:
In article ,
Martin Brown wrote:
On 05/04/2021 16:15, Dave Plowman (News) wrote:
On another group, I heard about a lightning strike to a house, via the
TV aerial. Aerial went to a DA. Seemed it burnt out all the house
wiring and every appliance in it. Requiring the owners to move out for
months while it was all sorted. Seems it also travelled to other
houses in the street too via the mains and caused much damage there
too. Was rather surprised to read this. I've seen a TV destroyed - but
not so much extra damage.


It seems quite unlikely. Our VH has taken the odd hit and whilst it
takes out the mains for a while the emergency lights survive OK.


A building I was in at work took a big direct hit that found its way
into the internal telephone network deafening the lady on the
switchboard who was unconsolable afterwards (as in it took about a day
to recover her hearing) .


Vapourised the phone cabling in the trunking leaving nasty black marks
on the wall. We felt very aggrieved that the strike hit our apex rather
than the much higher supergrid pylon 100m away. Capricious stuff is
lightning. It was one of those big industrial sheds with a metal roof.


Induced currents blew out some of the more delicate parts of the
mainframe interface boards whilst the surge suppressors saved themselves
by allowing other more delicate (ie. expensive) components to fry.


Once the damage was assessed we were back on mains power fairly quickly.
Emergency diesel generator cut in for critical systems as the mains went
down. Smelly noisy thing but at least it worked on the day! Internal
phone system was down for most of a week - complete rewire needed.


I have had modems killed by close lightning strikes but that is about
it. You can't rule it out but it must be very unlikely. Most times the
UPS or emergency backup power maintains full operation.


You would have to be very unlucky for it to damage mains wiring but if
it does then the huge currents involved can be very destructive.

Yes - I can readily see all that happening. But the story teller was very
definite about it being a TV aerial strike. And that being on a DA. Which
then jumped into the mains and destroyed all of that. And in a couple of
neighbouring houses too.

I'd have expected a major strike to have cause a fire, or structural
damage first.

--
*I'm not as think as you drunk I am.
Dave Plowman London SW
To e-mail, change noise into sound.


The thing is how do you know which direction it went to and from.
The aerial lead was damaged the lead blew out of the back of the TV.
The aerial cable seemd OK but teh screen seemed chard and a bit brittle but still worked.
The fuse in a mains plug vapourised, the HDMI lead to the DVD player
'soldered' itself to the curcuit board.
But no one saw the TV aerial get hit, but it was reproted that someone saw lighting hit
the virgin media box in the street, I heard the crack of lightening which was about 1/2 mile away.
I remmeber it because it didn't make the same sound as I normally hear from thinder/lightning.
Don;t forget that loightning can be postive or negative.




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Default Lightning strike.

In article ,
williamwright wrote:
On 06/04/2021 14:33, Dave Plowman (News) wrote:
But the story teller was very
definite about it being a TV aerial strike.


You often can't tell whether the lightning hit the aerial or the nearby
masonry. I've been to a lot of these.


But would hitting the house structure cause so much electrical damage to
it and the surrounding ones?

--
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Dave Plowman London SW
To e-mail, change noise into sound.
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Default Lightning strike.

In article ,
williamwright wrote:
On 06/04/2021 19:42, Rod Speed wrote:
or structural damage first.


Thatís even rarer.


A strike on a building or its aerial usually causes some structural
damage.


Quite - I've seen a house burnt out after an lightening strike.

--
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Dave Plowman London SW
To e-mail, change noise into sound.
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