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Thierry January 25th 04 02:03 PM

Damaged by a lightning ?
 
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



Henry Kolesnik January 25th 04 03:04 PM

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





Henry Kolesnik January 25th 04 03:04 PM

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





Airy R. Bean January 25th 04 03:49 PM

"Let us spray"?

"Henry Kolesnik" wrote in message
...
I believe lightning struck my chimney and took out the lawn sprinkler
control system and a couple of appliances.




Airy R. Bean January 25th 04 03:49 PM

"Let us spray"?

"Henry Kolesnik" wrote in message
...
I believe lightning struck my chimney and took out the lawn sprinkler
control system and a couple of appliances.




David Morgan January 25th 04 05:06 PM

Safe Breaker wrote:
On Sun, 25 Jan 2004 15:49:25 -0000, "Airy R. Bean"
wrote:

"Let us spray"?


Face it, if wit was sh*t you'd be constipated.


I think you're being a bit harsh on Airy

--
David



David Morgan January 25th 04 05:06 PM

Safe Breaker wrote:
On Sun, 25 Jan 2004 15:49:25 -0000, "Airy R. Bean"
wrote:

"Let us spray"?


Face it, if wit was sh*t you'd be constipated.


I think you're being a bit harsh on Airy

--
David



Thierry January 25th 04 05:56 PM


"Henry Kolesnik" wrote in message
...
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.


Indeed, without care the binding between two metals is always "at risk".
Polyphaser and other grounding kit manufacturers provide products to prevent
this kind of corrosion, including coating for anchor guys (like Anchor
Guard).

Thierry


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







Thierry January 25th 04 05:56 PM


"Henry Kolesnik" wrote in message
...
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.


Indeed, without care the binding between two metals is always "at risk".
Polyphaser and other grounding kit manufacturers provide products to prevent
this kind of corrosion, including coating for anchor guys (like Anchor
Guard).

Thierry


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







Airy R. Bean January 25th 04 06:33 PM

The CBer reveals herself every time that she opens her mouth....

"Safe Breaker" wrote in message
...

Face it, if wit was sh*t you'd be constipated.




Airy R. Bean January 25th 04 06:33 PM

The CBer reveals herself every time that she opens her mouth....

"Safe Breaker" wrote in message
...

Face it, if wit was sh*t you'd be constipated.




W4JLE January 25th 04 10:01 PM

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...




W4JLE January 25th 04 10:01 PM

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...




Frank January 26th 04 12:56 AM

W4JLE ...

^ 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.)

Nice! Are you taking it with you when you move?

Frank


Frank January 26th 04 12:56 AM

W4JLE ...

^ 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.)

Nice! Are you taking it with you when you move?

Frank


Mark Keith January 26th 04 06:14 AM

"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

Mark Keith January 26th 04 06:14 AM

"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

Frank January 26th 04 11:17 AM

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


Frank January 26th 04 11:17 AM

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


Thierry January 27th 04 10:20 AM

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 January 27th 04 10:20 AM

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





Roger Halstead January 28th 04 03:50 AM

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 January 28th 04 03:50 AM

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



Laurie January 28th 04 07:48 PM

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



Laurie January 28th 04 07:48 PM

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



Roger Halstead January 29th 04 06:05 AM

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


Roger Halstead January 29th 04 06:05 AM

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


Roger Halstead January 29th 04 06:34 AM

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

Roger Halstead January 29th 04 06:34 AM

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

Laurie January 29th 04 12:31 PM

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

[snip]

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.


I've got the same FP 't-shirt' :-)


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


You're welcome, all seems fine now.
You have a much better head for heights than I have.

--
73 Laurie - G6ISY



Laurie January 29th 04 12:31 PM

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

[snip]

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.


I've got the same FP 't-shirt' :-)


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


You're welcome, all seems fine now.
You have a much better head for heights than I have.

--
73 Laurie - G6ISY



Dick January 29th 04 01:39 PM

Great site Roger! Makes me tired just looking at it. :-)

Dick - W6CCD

On Thu, 29 Jan 2004 06:34:18 GMT, Roger Halstead
wrote:

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



Dick January 29th 04 01:39 PM

Great site Roger! Makes me tired just looking at it. :-)

Dick - W6CCD

On Thu, 29 Jan 2004 06:34:18 GMT, Roger Halstead
wrote:

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



J. Harvey January 30th 04 10:57 PM

"Roger Halstead"
Rarely does the system suffer damage.

...one computer...
...one PolyPhaser...
...a repeater antenna...
...a section of 5/8ths inch Heliax...
...every bit of water proofing...
...all the silver plating...
...a two meter rig...
...a barrel connector (N type)...


Geesus H. !

I guess so long as you think that you're happy,
then you're happy. ;-)

Carry on then.

J. Harvey January 30th 04 10:57 PM

"Roger Halstead"
Rarely does the system suffer damage.

...one computer...
...one PolyPhaser...
...a repeater antenna...
...a section of 5/8ths inch Heliax...
...every bit of water proofing...
...all the silver plating...
...a two meter rig...
...a barrel connector (N type)...


Geesus H. !

I guess so long as you think that you're happy,
then you're happy. ;-)

Carry on then.

Gary Peach January 31st 04 10:29 PM


"J. Harvey" wrote in message
m...
"Roger Halstead"
Rarely does the system suffer damage.

...one computer...
...one PolyPhaser...
...a repeater antenna...
...a section of 5/8ths inch Heliax...
...every bit of water proofing...
...all the silver plating...
...a two meter rig...
...a barrel connector (N type)...


Geesus H. !


I saw the result of a lightening strike at Barkway on Royston Heath.
The lightening came down our waveguide without any damage but inside teh
equipemy huit it vapourised teh big circuit breaker on teh wall and left a
hole wher it had been and chared melted wires some distance above and below
wher the box had been mounted.



I guess so long as you think that you're happy,
then you're happy. ;-)


cogito ergo sum

Only some 3,000 years earlier.

Gary7SLL



Gary Peach January 31st 04 10:29 PM


"J. Harvey" wrote in message
m...
"Roger Halstead"
Rarely does the system suffer damage.

...one computer...
...one PolyPhaser...
...a repeater antenna...
...a section of 5/8ths inch Heliax...
...every bit of water proofing...
...all the silver plating...
...a two meter rig...
...a barrel connector (N type)...


Geesus H. !


I saw the result of a lightening strike at Barkway on Royston Heath.
The lightening came down our waveguide without any damage but inside teh
equipemy huit it vapourised teh big circuit breaker on teh wall and left a
hole wher it had been and chared melted wires some distance above and below
wher the box had been mounted.



I guess so long as you think that you're happy,
then you're happy. ;-)


cogito ergo sum

Only some 3,000 years earlier.

Gary7SLL



Jock February 1st 04 12:31 AM

On Sat, 31 Jan 2004 22:29:19 +0000 (UTC), "Gary Peach"
wrote:


"J. Harvey" wrote in message
om...
"Roger Halstead"
Rarely does the system suffer damage.

...one computer...
...one PolyPhaser...
...a repeater antenna...
...a section of 5/8ths inch Heliax...
...every bit of water proofing...
...all the silver plating...
...a two meter rig...
...a barrel connector (N type)...


Geesus H. !


I saw the result of a lightening strike at Barkway on Royston Heath.
The lightening came down our waveguide without any damage but inside teh
equipemy huit it vapourised teh big circuit breaker on teh wall and left a
hole wher it had been and chared melted wires some distance above and below
wher the box had been mounted.


Can't think of a better place for "lightening" to strike than Barkway.

I kate it you where in eht RAF hewn all this happened?

--
Jock.

Jock February 1st 04 12:31 AM

On Sat, 31 Jan 2004 22:29:19 +0000 (UTC), "Gary Peach"
wrote:


"J. Harvey" wrote in message
om...
"Roger Halstead"
Rarely does the system suffer damage.

...one computer...
...one PolyPhaser...
...a repeater antenna...
...a section of 5/8ths inch Heliax...
...every bit of water proofing...
...all the silver plating...
...a two meter rig...
...a barrel connector (N type)...


Geesus H. !


I saw the result of a lightening strike at Barkway on Royston Heath.
The lightening came down our waveguide without any damage but inside teh
equipemy huit it vapourised teh big circuit breaker on teh wall and left a
hole wher it had been and chared melted wires some distance above and below
wher the box had been mounted.


Can't think of a better place for "lightening" to strike than Barkway.

I kate it you where in eht RAF hewn all this happened?

--
Jock.

Gary Peach February 1st 04 08:56 AM


"Jock" wrote in message
...
On Sat, 31 Jan 2004 22:29:19 +0000 (UTC), "Gary Peach"


wrote:


"J. Harvey" wrote in message
om...
"Roger Halstead"
Rarely does the system suffer damage.

...one computer...
...one PolyPhaser...
...a repeater antenna...
...a section of 5/8ths inch Heliax...
...every bit of water proofing...
...all the silver plating...
...a two meter rig...
...a barrel connector (N type)...

Geesus H. !


I saw the result of a lightening strike at Barkway on Royston Heath.
The lightening came down our waveguide without any damage but inside teh
equipemy huit it vapourised teh big circuit breaker on teh wall and left

a
hole wher it had been and chared melted wires some distance above and

below
wher the box had been mounted.


Can't think of a better place for "lightening" to strike than Barkway.

I kate it you where in eht RAF hewn all this happened?


No, Engineer (Microwave) with PYE Telecommunications
We had teh first non GPO television microwave link between Birmingham and
London.
We were trying to break teh GPO monopoly on supplying and also regulating
radio communications.
It must have worked because the GPO /BT is no longer the only supplieer.

CML building Birmingham, Meriden, Cold Ashby, Barkway, Hill Crest (Highgate,
just down teh road from the BBC station at Swains Lane)
We were contracted to ATV.
Teh Link was used to show the adverts going out in Birmingham to the
sponsors in London.

Thanks for taking the **** out of my creeping disability, It keeps a sens of
proportion for me,
console yourself that it won't last much longer and I won't be able to type
at all.

Gary7SLL




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