Mark Keith . ..

^ - you left some gears switched on during the strike event
^
^ Gears???? No compute...

"Gear", not "gears". "Gear" is both singular and plural without the
apostrophe but that sense doesn't translate well. He means "equipment".

Frank

Mark Keith . ..

^ - you left some gears switched on during the strike event
^
^ Gears???? No compute...

"Gear", not "gears". "Gear" is both singular and plural without the
apostrophe but that sense doesn't translate well. He means "equipment".

Frank

I believe lightning struck my chimney and took out the lawn sprinkler
control system and a couple of appliances. After a while I found the
reason. The clamp on the ground rod for the house ground wire had
disintegrated and I think the disintigration was caused by galvanic action.
I just replaced with awhat I thought was a better one and the new one didn't
corrode.
73
hank wd5jfr
"Thierry" To answer me in private use
http://www.astrosurf.com/lombry/post.htm wrote in message
...
Hi,

Was your house/shack stroken by Thor's hammer, I mean a lightning recently
?
I am interested in your experience...

If your installaiton was damaged by a strike event, I would like to now if
:
- you used a central ground point bonded to an external grounding system,
as
well as the home ground.
- you left some gears switched on during the strike event
- you left the TX switched on and the coaxial plugged without protection
- you installed or not lightning controllers in your electric distribution
panel
- you had installed another protection
- you swicthed off and unplugged all devices
- you think that the energy came back via the grounding network (probably
dut to a difference of potential in a device)

Tell me only in a few words what was the most probable cause of the
accident.

At last, if you master the subject, do you really think that a grounding
system, as best it could be as the advice provided by PolyPhaser for
example, will never protect you against a direct strike on your antenna or
on the house lightning conductor
Why ?

All this will help me to conclude the article dealing with this matter :
http://www.astrosurf.com/lombry/qsl-...protection.htm

Thanks in advance

NB. Answer preferably through these forums to please everybody.

Thierry
ON4SKY

Station grounded to central ground (10 foot ground rod in Georgia Clay tied
to 60 radials each 60 feet long 1" below the surface put in before the house
was built.)

Power unplugged all antennas grounded via the antenna switch.

1/2 of G5RV up 40 feet, antenna vaporized with only bits and pieces found,
the other half undamaged. Came in via powerlines and antenna. All electronic
devices in the house destroyed

All antennas on 80 foot tower were untouched.

main stroke followed the powerlines in the attic. The overpressure blew
vinyl siding off the house.

In the hamshack the voltage exited the coax from a coiled section burning
the rug. TS-830 and 440 destroyed in spite of being unplugged. 6 foot color
TV, electronic air cleaner, VCR etc all destroyed. The only electronic
survivor was a bedside GE $10 radio alarm clock.

This is a rural setting on 29 acres. Closest house 1/2 mile away. All
utilities underground from the road to the house. Closest overhead utilities
are 1600 feet away.




"Thierry" To answer me in private use
http://www.astrosurf.com/lombry/post.htm wrote in message
...
Hi,

Was your house/shack stroken by Thor's hammer, I mean a lightning recently
?
I am interested in your experience...

Many thanks to all you you.
I will probably contact you personally very soon.

73's
Thierry
ON4SKY

"Thierry" To answer me in private use
http://www.astrosurf.com/lombry/post.htm wrote in message
...
Hi,

Was your house/shack stroken by Thor's hammer, I mean a lightning recently
?
I am interested in your experience...

If your installaiton was damaged by a strike event, I would like to now if
:
- you used a central ground point bonded to an external grounding system,
as
well as the home ground.
- you left some gears switched on during the strike event
- you left the TX switched on and the coaxial plugged without protection
- you installed or not lightning controllers in your electric distribution
panel
- you had installed another protection
- you swicthed off and unplugged all devices
- you think that the energy came back via the grounding network (probably
dut to a difference of potential in a device)

Tell me only in a few words what was the most probable cause of the
accident.

At last, if you master the subject, do you really think that a grounding
system, as best it could be as the advice provided by PolyPhaser for
example, will never protect you against a direct strike on your antenna or
on the house lightning conductor
Why ?

All this will help me to conclude the article dealing with this matter :
http://www.astrosurf.com/lombry/qsl-...protection.htm

Thanks in advance

NB. Answer preferably through these forums to please everybody.

Thierry
ON4SKY

"Thierry" To answer me in private use http://www.astrosurf.com/lombry/post.htm wrote in message ...
Hi,

Was your house/shack stroken by Thor's hammer, I mean a lightning recently ?

My mast has been struck twice in the last 4 years.
I am interested in your experience...

If your installaiton was damaged by a strike event, I would like to now if :
- you used a central ground point bonded to an external grounding system, as
well as the home ground.

My mast is the central ground point. It's tied into to water pipe,
which is about 2 ft away, and also tied into my "ground window"
outside the shack. All the ground here is tied together, and at the
same potential. The water pipe is iron, not pvc.

- you left some gears switched on during the strike event

Gears???? No compute...

- you left the TX switched on and the coaxial plugged without protection

Yes. So was my computer and monitor. Neither flinched at all.
- you installed or not lightning controllers in your electric distribution
panel

No.
- you had installed another protection
No.
- you swicthed off and unplugged all devices
Yes. But to my radios only. IE: rig and amp unplugged from the wall.
Phone line to the computer unplugged. All the other stuff in the
house/room was left on and plugged in.
My computer was on, as was the TV in the room, which is on cable.

- you think that the energy came back via the grounding network (probably
dut to a difference of potential in a device)

Most all of the strike energy went straight to ground via the mast I'm
fairly sure.
I had no damage to anything anywhere. The only thing is did was blow a
hole in my electrical tape "water cap" on the top of the mast. Also
made the slightest arc spot on the end of the mast. You would have to
look hard to see it.

Tell me only in a few words what was the most probable cause of the
accident.

Accident? What accident? The lightning strike did exactly what I was
intending/hoping it would do.

At last, if you master the subject, do you really think that a grounding
system, as best it could be as the advice provided by PolyPhaser for
example, will never protect you against a direct strike on your antenna or
on the house lightning conductor
Why ?

You can protect from a direct strike. The level of protection will
depend on the clamping voltage of the gas tube, or whatever you use.
The higher power gas tubes clamp at a higher voltage. If you want max
protection use a low power protector. But I'm too paranoid to operate
during lightning. I see no point anyway, being the static would be a
mess... I totally unhook and ground all antennas. Also, my mast is
much most likely to attract a strike rather than my antennas
themselves. They just float along for the ride. My coaxes all run all
the way down to the ground. The mast acts as a lightning rod in my
case. I was sitting 15 feet away from my mast when it struck mine. In
reality, it's kind of a non event..It's so quick , it's over before
you realize what happened. The strike itself is pretty quiet if you
have a low resistance connection like a well grounded mast. About like
throwing a lightbulb on the ground and breaking it. Only the sonic
boom overhead is loud. You also hear a click in your auditory nerves
when you are that close. Lightning has also hit tall trees in our yard
in that time period. The tree in the front yard was nailed a few
months ago. MK

On Sun, 25 Jan 2004 15:03:59 +0100, "Thierry" To answer me in private
use http://www.astrosurf.com/lombry/post.htm wrote:

Hi,

Was your house/shack stroken by Thor's hammer, I mean a lightning recently ?
I am interested in your experience...

The " system" gets hit about 3 times a year on average.
http://www.rogerhalstead.com/ham_files/tower.htm

If your installaiton was damaged by a strike event, I would like to now if :

Rarely does the system suffer damage.

- you used a central ground point bonded to an external grounding system, as
well as the home ground.

The system uses a network, or grid of ground rods. 31 in the antenna
and radio system, plus 5 for the house electrical system. It's all
bonded together.

- you left some gears switched on during the strike event

Gears as in aircrafts ...
Queens English Vs US English = Gear and aircraft:-)) Over here
neither uses an s which is confusing to some.

- you left the TX switched on and the coaxial plugged without protection

Rarely is the gear disconnected and I don't remember the last time I
disconnected a coax due to storms.

- you installed or not lightning controllers in your electric distribution

I do not have any in the distribution panel.
I do have PolyPhasers for each coax mounted on a common bulkhead which
is tied to the ground system using bare #2 copper cable.

panel
- you had installed another protection
- you swicthed off and unplugged all devices

Never bother.

- you think that the energy came back via the grounding network (probably
dut to a difference of potential in a device)

I lost one computer due to a pulse coming in on the telephone line.
Nothing spectacular.

Tell me only in a few words what was the most probable cause of the
accident.

The one telephone cable was hot to ground with enough voltage to fry
the solid state components.


At last, if you master the subject, do you really think that a grounding
system, as best it could be as the advice provided by PolyPhaser for
example, will never protect you against a direct strike on your antenna or
on the house lightning conductor

I have 31 ground rods in the radio station ground system tied (cad
welded) to over 600 feet of bare copper cable within 2 inches of the
surface.

All antennas are grounded either due to design, or a balun.

The devices appear to work as advertised.

Why ?

I've lost one PolyPhaser with no damage to the rig that was hooked to
it. (Kenwood TM-V7A)

I had one lightening strike destroy a repeater antenna, blow out a
section of 5/8ths inch Heliax about 30 feet down from the antenna, as
well as blow off every bit of water proofing and all the silver
plating from every coax connector at the top of the tower. The only
damage was the input transistor in a two meter rig which was not the
rig connected to the antenna that was hit. That rig was not protected
by a PolyPhaser.

Lightening and the results of a strike are unpredictable, but with the
repeated strikes here, experience has shown me that apparently the
PolyPhasers do their job in a well designed system.

Last Summer I had a barrel connector (N type) short out in the coax
from one of the 75 meter slopers to the tower mounted antenna
selector. I'm assuming it was probably a near by strike, but I have no
way of knowing for sure.

Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com

All this will help me to conclude the article dealing with this matter :
http://www.astrosurf.com/lombry/qsl-...protection.htm

Thanks in advance

NB. Answer preferably through these forums to please everybody.

Thierry
ON4SKY

Roger Halstead wrote:
The " system" gets hit about 3 times a year on average.
http://www.rogerhalstead.com/ham_files/tower.htm

Interesting site. However the links to your larger pictures are all broken.
They refer to files on your local PC eg:
file:///C:/Documents%20and%20Settings/Administrator.ROGER2.000/My%20Documents/My%20Webs/ham_files/tower8.htm

--
73 Laurie - G6ISY

On Wed, 28 Jan 2004 19:48:06 -0000, "Laurie"
wrote:

Roger Halstead wrote:
The " system" gets hit about 3 times a year on average.
http://www.rogerhalstead.com/ham_files/tower.htm

Interesting site. However the links to your larger pictures are all broken.
They refer to files on your local PC eg:
file:///C:/Documents%20and%20Settings/Administrator.ROGER2.000/My%20Documents/My%20Webs/ham_files/tower8.htm

Thanks for telling me.

I uploaded some frames for the local EAA Chapter and apparently "Front
Page" in its infuriating propensity to change everything to it's way
of thinking "did it to me" again.

FP is great to work with "at times", but it uses sloppy and bloated
code you don't need. And... If you forget it'll upload files other
than what you planned. Down load 'em and then re upload them and you
will find them reconfigured.

sigh Back to fixing links. (I wonder what else may have been
broken) I have nearly 60 megs on those pages.

Again, thanks,

Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com

On Wed, 28 Jan 2004 19:48:06 -0000, "Laurie"
wrote:

Roger Halstead wrote:
The " system" gets hit about 3 times a year on average.
http://www.rogerhalstead.com/ham_files/tower.htm

Interesting site. However the links to your larger pictures are all broken.
They refer to files on your local PC eg:
file:///C:/Documents%20and%20Settings/Administrator.ROGER2.000/My%20Documents/My%20Webs/ham_files/tower8.htm

sigh It wasn't as bad as I feared, but not as good as I hoped.:-))

Having a backup, I turned off the FP extensions on the server,
up-loaded the tower.htm file using ftp and then went through it image
by image.
One directory missing, 4 files missing (htms) and one bad link.
and one image. I have no idea as to where it put that image which is
supposed to be in a sub directory one level down from ham_files which
is one level down from the root.

All-in-all, about 20 minutes to fix including the wait for FP to
reconfigure.

That utility can be great for some things and a royal pain for others.

At least the frames still work.
OTOH when I get the interactive *stuff* going I won't be able to turn
them off.

Again, thanks for letting me know about the broken links.

Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com