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[email protected] October 30th 07 10:12 PM

Advice on antenna and installation
 
Hi all. I've looked around and found several people who recommend the
Philips MNT902W outdoor antenna for picking up HD (and SD) over the
air signals. Anyone on here used it and want to comment? I'm also
interested in how big the thing is ASSEMBLED. I found lots of helpful
info about how big the box it comes in is, but nothing on how big it
is put together. I ask because rumor has it you can mount them in the
attic and they will still work very well. I happen to have a tiny
attic. Anyone have experience mounting antennas in attics? Is the
reception drastically reduced? Final question, if I install this
outside or in the attic, do I need to somehow ground/protect it from
lightning? If yes, how exactly does one go about it? Thanks all!
-Will


[email protected] October 30th 07 10:31 PM

Advice on antenna and installation
 
wrote:
Hi all. I've looked around and found several people who recommend the
Philips MNT902W outdoor antenna for picking up HD (and SD) over the
air signals. Anyone on here used it and want to comment? I'm also
interested in how big the thing is ASSEMBLED. I found lots of helpful
info about how big the box it comes in is, but nothing on how big it
is put together. I ask because rumor has it you can mount them in the
attic and they will still work very well. I happen to have a tiny
attic. Anyone have experience mounting antennas in attics? Is the
reception drastically reduced? Final question, if I install this
outside or in the attic, do I need to somehow ground/protect it from
lightning? If yes, how exactly does one go about it? Thanks all!
-Will


You may be able to fit it in your attic, but it will give better
results on the roof. Depending on the stations in your area, you
might be better off with the Channel Master 4228. It is designed
as a UHF antenna, but picks up the high VHF channels quite well.
Check this website to see what size you need:
www.antennaweb.org

Chip

--
-------------------- http://NewsReader.Com/ --------------------
Usenet Newsgroup Service $9.95/Month 30GB

Yellowbeard October 31st 07 04:45 AM

Advice on antenna and installation
 
On Oct 30, 2:31 pm, wrote:
wrote:
Hi all. I've looked around and found several people who recommend the
Philips MNT902W outdoor antenna for picking up HD (and SD) over the
air signals. Anyone on here used it and want to comment? I'm also
interested in how big the thing is ASSEMBLED. I found lots of helpful
info about how big the box it comes in is, but nothing on how big it
is put together. I ask because rumor has it you can mount them in the
attic and they will still work very well. I happen to have a tiny
attic. Anyone have experience mounting antennas in attics? Is the
reception drastically reduced? Final question, if I install this
outside or in the attic, do I need to somehow ground/protect it from
lightning? If yes, how exactly does one go about it? Thanks all!
-Will


You may be able to fit it in your attic, but it will give better
results on the roof. Depending on the stations in your area, you
might be better off with the Channel Master 4228. It is designed
as a UHF antenna, but picks up the high VHF channels quite well.
Check this website to see what size you need:www.antennaweb.org

Chip

--
--------------------http://NewsReader.Com/--------------------
Usenet Newsgroup Service $9.95/Month 30GB


I am just about to dump or reduce my dishnetwork. My local OTA HD is
great!
I bought a $12 HD (rabbit ear) antenna from RatShack and a $79 ATSC
tuner box from newegg.
Togther with my older 27" analog tv in the bedroom it picks up "ALL"
local (TUCSON AZ) digital stations. Whoo Hoo! ! !

Plus I do have my old roof antenna that I feed into my living room
Wide LCD with builtin ATSC digital tuner. These work really well.
You do not neccessarily have to have a "digital" antenna, unless you
have a bad signal situation.

I am expecting delivery of a Phillips DVD burner with 160g HDD with
ATSC tuner for PVR functions of OTA any day now.
My 2¢ -YB-


G-squared October 31st 07 05:56 AM

Advice on antenna and installation
 
On Oct 30, 8:45 pm, Yellowbeard wrote:

I am just about to dump or reduce my dishnetwork. My local OTA HD

is
great!
I bought a $12 HD (rabbit ear) antenna from RatShack and a $79 ATSC
tuner box from newegg.
Togther with my older 27" analog tv in the bedroom it picks up

"ALL"
local (TUCSON AZ) digital stations. Whoo Hoo! ! !

Plus I do have my old roof antenna that I feed into my living room
Wide LCD with builtin ATSC digital tuner. These work really well.
You do not neccessarily have to have a "digital" antenna, unless

you
have a bad signal situation.

I am expecting delivery of a Phillips DVD burner with 160g HDD with
ATSC tuner for PVR functions of OTA any day now.
My 2¢ -YB-


You'll like it but don't be surprised if you want a bigger disk drive
down the road. I've started recording lots of shows for later in the
season when the reruns start - not here. So far after 5 weeks I have
370 gigs 'in the can' on a 500 gig drive with another 500 gig drive
waiting to be opened and also a 320 gig and if I need another 500
gigs, well, that's another $120

GG


Wes Newell October 31st 07 06:56 AM

Advice on antenna and installation
 
On Tue, 30 Oct 2007 21:12:40 +0000, larkmore wrote:

Hi all. I've looked around and found several people who recommend the
Philips MNT902W outdoor antenna for picking up HD (and SD) over the air
signals. Anyone on here used it and want to comment?


You can find reviews all over the web. Here's one.

five good years until it fell apart
Reviewer: 5goodyrs from west texas on Mon Mar 26 09:52:56 EDT 2007

It works great until the elements start falling off in the wind.

--
Want the ultimate in free OTA SD/HDTV Recorder? http://mythtv.org
My Tivo Experience http://wesnewell.no-ip.com/tivo.htm
Tivo HD/S3 compared http://wesnewell.no-ip.com/mythtivo.htm
AMD cpu help http://wesnewell.no-ip.com/cpu.php

Adrian A October 31st 07 10:01 AM

Advice on antenna and installation
 
Yellowbeard wrote:
On Oct 30, 2:31 pm, wrote:
wrote:
Hi all. I've looked around and found several people who recommend
the Philips MNT902W outdoor antenna for picking up HD (and SD) over
the air signals. Anyone on here used it and want to comment? I'm
also interested in how big the thing is ASSEMBLED. I found lots of
helpful info about how big the box it comes in is, but nothing on
how big it is put together. I ask because rumor has it you can
mount them in the attic and they will still work very well. I
happen to have a tiny attic. Anyone have experience mounting
antennas in attics? Is the reception drastically reduced? Final
question, if I install this outside or in the attic, do I need to
somehow ground/protect it from lightning? If yes, how exactly does
one go about it? Thanks all! -Will


You may be able to fit it in your attic, but it will give better
results on the roof. Depending on the stations in your area, you
might be better off with the Channel Master 4228. It is designed
as a UHF antenna, but picks up the high VHF channels quite well.
Check this website to see what size you need:www.antennaweb.org

Chip

--
--------------------http://NewsReader.Com/--------------------
Usenet Newsgroup Service $9.95/Month 30GB


I am just about to dump or reduce my dishnetwork. My local OTA HD is
great!
I bought a $12 HD (rabbit ear) antenna from RatShack and a $79 ATSC
tuner box from newegg.
Togther with my older 27" analog tv in the bedroom it picks up "ALL"
local (TUCSON AZ) digital stations. Whoo Hoo! ! !

Plus I do have my old roof antenna that I feed into my living room
Wide LCD with builtin ATSC digital tuner. These work really well.
You do not neccessarily have to have a "digital" antenna, unless you
have a bad signal situation.

I am expecting delivery of a Phillips DVD burner with 160g HDD with
ATSC tuner for PVR functions of OTA any day now.
My 2¢ -YB-


There is no such thing as a "digital" antenna!



Dave Oldridge November 1st 07 06:25 AM

Advice on antenna and installation
 
Wes Newell wrote in news:zOUVi.9774$aJ3.8925
@trnddc02:

On Tue, 30 Oct 2007 21:12:40 +0000, larkmore wrote:

Hi all. I've looked around and found several people who recommend the
Philips MNT902W outdoor antenna for picking up HD (and SD) over the air
signals. Anyone on here used it and want to comment?


You can find reviews all over the web. Here's one.

five good years until it fell apart
Reviewer: 5goodyrs from west texas on Mon Mar 26 09:52:56 EDT 2007

It works great until the elements start falling off in the wind.


I used to live on Sable Island (90 miles off the Nova Scotia coast in the
North Atlantic. We used to budget for about three TV antennas annually
because, sooner or later the weather would strip them to a bare boom!


--
Dave Oldridge+
ICQ 1800667

[email protected] November 7th 07 06:19 PM

Advice on antenna and installation
 
Thanks for the info all.

Any additional comments on the grounding/lightning protection
question? I don't want to turn the thing into a lightning rod, but
don't know what the accepted installation practice is. Any takers?
-Will


[email protected] November 7th 07 07:15 PM

Advice on antenna and installation
 
wrote:
Thanks for the info all.

Any additional comments on the grounding/lightning protection
question? I don't want to turn the thing into a lightning rod, but
don't know what the accepted installation practice is. Any takers?
-Will


Contact your local building department.
They will let you know what the local codes are.

Chip

--
--------------------
http://NewsReader.Com/ --------------------
Usenet Newsgroup Service $9.95/Month 30GB

Wes Newell November 7th 07 08:50 PM

Advice on antenna and installation
 
On Wed, 07 Nov 2007 09:19:12 -0800, larkmore wrote:

Thanks for the info all.

Any additional comments on the grounding/lightning protection question?
I don't want to turn the thing into a lightning rod, but don't know what
the accepted installation practice is. Any takers? -Will


If you look at your TV/VCR/Other manual, you'll find they all say the
antenna must be grounded. There are probably codes that say the same in
your city/state. What you do is up to you. I haven't grounded mine since
1969 after my grounded antenna was hit twice. Maybe it's just coincidence
that my ungrounded antenna hasn't been hit in the last 38 years.:-)
This is not a recommendation of either way. You decide.

--
Want the ultimate in free OTA SD/HDTV Recorder? http://mythtv.org
My Tivo Experience http://wesnewell.no-ip.com/tivo.htm
Tivo HD/S3 compared http://wesnewell.no-ip.com/mythtivo.htm
AMD cpu help http://wesnewell.no-ip.com/cpu.php

G-squared November 8th 07 06:13 AM

Advice on antenna and installation
 
On Nov 7, 11:50 am, Wes Newell wrote:
On Wed, 07 Nov 2007 09:19:12 -0800, larkmore wrote:
Thanks for the info all.


Any additional comments on the grounding/lightning protection question?
I don't want to turn the thing into a lightning rod, but don't know what
the accepted installation practice is. Any takers? -Will


If you look at your TV/VCR/Other manual, you'll find they all say the
antenna must be grounded. There are probably codes that say the same in
your city/state. What you do is up to you. I haven't grounded mine since
1969 after my grounded antenna was hit twice. Maybe it's just coincidence
that my ungrounded antenna hasn't been hit in the last 38 years.:-)
This is not a recommendation of either way. You decide.

--
Want the ultimate in free OTA SD/HDTV Recorder?http://mythtv.org
My Tivo Experiencehttp://wesnewell.no-ip.com/tivo.htm
Tivo HD/S3 comparedhttp://wesnewell.no-ip.com/mythtivo.htm
AMD cpu helphttp://wesnewell.no-ip.com/cpu.php


I have to confess I have not had a 'grounded' antenna in 20 years and
am not convinced its a good thing. In California lightning is not that
common and there are trees and power poles nearby that are taller than
the antenna so I don't think its that big a risk. I should find the
ham operator not far from here as his antenna is on a tower on a
modest hill to find out if his rig has been hit.

I had to use a a galvanic isolator on the coax between the 2 rooms the
multiple computers are in to prevent audio hum from a ground loop. The
2 rooms were built 40 years apart and are on different power panels
though there is only one feed into the house.

GG


Leonard Caillouet November 8th 07 12:06 PM

Advice on antenna and installation
 
"G-squared" wrote in message
oups.com...
On Nov 7, 11:50 am, Wes Newell wrote:
On Wed, 07 Nov 2007 09:19:12 -0800, larkmore wrote:
Thanks for the info all.


Any additional comments on the grounding/lightning protection question?
I don't want to turn the thing into a lightning rod, but don't know
what
the accepted installation practice is. Any takers? -Will


If you look at your TV/VCR/Other manual, you'll find they all say the
antenna must be grounded. There are probably codes that say the same in
your city/state. What you do is up to you. I haven't grounded mine since
1969 after my grounded antenna was hit twice. Maybe it's just coincidence
that my ungrounded antenna hasn't been hit in the last 38 years.:-)
This is not a recommendation of either way. You decide.

--
Want the ultimate in free OTA SD/HDTV Recorder?http://mythtv.org
My Tivo Experiencehttp://wesnewell.no-ip.com/tivo.htm
Tivo HD/S3 comparedhttp://wesnewell.no-ip.com/mythtivo.htm
AMD cpu helphttp://wesnewell.no-ip.com/cpu.php


I have to confess I have not had a 'grounded' antenna in 20 years and
am not convinced its a good thing. In California lightning is not that
common and there are trees and power poles nearby that are taller than
the antenna so I don't think its that big a risk. I should find the
ham operator not far from here as his antenna is on a tower on a
modest hill to find out if his rig has been hit.

I had to use a a galvanic isolator on the coax between the 2 rooms the
multiple computers are in to prevent audio hum from a ground loop. The
2 rooms were built 40 years apart and are on different power panels
though there is only one feed into the house.

GG


Whether you think it is needed or not, it is required by electrical codes in
the USA that ANY incoming lines be grounded to the electrical service
ground. It simply seems foolish not to, IMO. But then I live in north
central Florida and have serviced hundreds of systems that were struch by
lightning and not properly grounded.

Leonard


G-squared November 8th 07 05:28 PM

Advice on antenna and installation
 
On Nov 8, 4:06 am, "Leonard Caillouet" wrote:
"G-squared" wrote in message

snip
I have to confess I have not had a 'grounded' antenna in 20 years

and
am not convinced its a good thing. In California lightning is not

that
common and there are trees and power poles nearby that are taller

than
the antenna so I don't think its that big a risk. I should find

the
ham operator not far from here as his antenna is on a tower on a
modest hill to find out if his rig has been hit.


I had to use a a galvanic isolator on the coax between the 2

rooms the
multiple computers are in to prevent audio hum from a ground

loop. The
2 rooms were built 40 years apart and are on different power

panels
though there is only one feed into the house.


GG


Whether you think it is needed or not, it is required by electrical

codes in
the USA that ANY incoming lines be grounded to the electrical

service
ground. It simply seems foolish not to, IMO. But then I live in

north
central Florida and have serviced hundreds of systems that were

struch by
lightning and not properly grounded.

Leonard


After seeing how a lightning bolt explodes a tree trunk, those little
ground wires don't 'strike' me as being more than a decoration.
Causing ground loops within the system seems more of a problem but
maybe because that is every day.

GG


common_ [email protected] November 9th 07 02:30 AM

Advice on antenna and installation
 
"Leonard Caillouet" wrote:

"G-squared" wrote in message
roups.com...
On Nov 7, 11:50 am, Wes Newell wrote:
On Wed, 07 Nov 2007 09:19:12 -0800, larkmore wrote:
Thanks for the info all.

Any additional comments on the grounding/lightning protection question?
I don't want to turn the thing into a lightning rod, but don't know
what
the accepted installation practice is. Any takers? -Will

If you look at your TV/VCR/Other manual, you'll find they all say the
antenna must be grounded. There are probably codes that say the same in
your city/state. What you do is up to you. I haven't grounded mine since
1969 after my grounded antenna was hit twice. Maybe it's just coincidence
that my ungrounded antenna hasn't been hit in the last 38 years.:-)
This is not a recommendation of either way. You decide.

--
Want the ultimate in free OTA SD/HDTV Recorder?http://mythtv.org
My Tivo Experiencehttp://wesnewell.no-ip.com/tivo.htm
Tivo HD/S3 comparedhttp://wesnewell.no-ip.com/mythtivo.htm
AMD cpu helphttp://wesnewell.no-ip.com/cpu.php


I have to confess I have not had a 'grounded' antenna in 20 years and
am not convinced its a good thing. In California lightning is not that
common and there are trees and power poles nearby that are taller than
the antenna so I don't think its that big a risk. I should find the
ham operator not far from here as his antenna is on a tower on a
modest hill to find out if his rig has been hit.

I had to use a a galvanic isolator on the coax between the 2 rooms the
multiple computers are in to prevent audio hum from a ground loop. The
2 rooms were built 40 years apart and are on different power panels
though there is only one feed into the house.

GG


Whether you think it is needed or not, it is required by electrical codes in
the USA that ANY incoming lines be grounded to the electrical service
ground. It simply seems foolish not to, IMO. But then I live in north
central Florida and have serviced hundreds of systems that were struch by
lightning and not properly grounded.

Leonard


leo

you could not be any more totally correct.....

I put up with constructive debates about various DVD formats, or
upscalers, or any dam other thing that doesn't directly threaten
somebodies life.

But proposing that you should not earth ground a piece of metal
sticking up from the top of ones house,,because your "opinion" thinks
it doesn't need to be done, is insanely stupid, and verging on
criminally irresponsible.

Thanks for posting,,,,hope many closed minds on this group listen and
ground, before worst happens.



Wes Newell November 9th 07 08:12 AM

Advice on antenna and installation
 
On Fri, 09 Nov 2007 01:30:57 +0000, common_ sense wrote:

But proposing that you should not earth ground a piece of metal sticking
up from the top of ones house,,because your "opinion" thinks it doesn't
need to be done, is insanely stupid, and verging on criminally
irresponsible.


So then I should go up on the roof and ground the metal entry pole that
goes into the attic. Then I should also ground the metal wind turbines.
And lets not forget the all metal chimney cover at the highest location.
You're a moron.

--
Want the ultimate in free OTA SD/HDTV Recorder? http://mythtv.org
My Tivo Experience http://wesnewell.no-ip.com/tivo.htm
Tivo HD/S3 compared http://wesnewell.no-ip.com/mythtivo.htm
AMD cpu help http://wesnewell.no-ip.com/cpu.php

w_tom November 10th 07 04:45 AM

Advice on antenna and installation
 
On Nov 8, 11:28 am, G-squared wrote:
After seeing how alightningbolt explodes a tree trunk, those little
ground wires don't 'strike' me as being more than a decoration.
Causing ground loops within the system seems more of a problem but
maybe because that is every day.


G-squared knows only because he feels? One damning indication? No
numbers. A responsible source provides numbers for a wire four time
smaller than those "little ground wires":
... consider that a bare 18 AWG (1 mm diameter) copper wire, in
air, normally will conduct at least 10 amperes safely, with very low
self-heating temperature rise. If the current slowly rises, the
temperature will increase until the melting temperature of 1065° C
(1950° F) is achieved at about 83 A. This same temperature could
be reached "instantly" by an 8x20 s pulse at a current of 61 kA.


Above numbers from a 1 Oct 2007 professional engineering publication
(Electrical Engineering Times); not from random speculation. That
"little ground wire" can be expected to conduct 200,000 amps which is
ten times more than current from the typically lightning bolt.

G-squared should have been asking a question - not posting
challenges based upon speculation without experience. That "little
ground wire" is proven sufficient by fundamental theory and by 100+
years of experience all over world. Oh. And it is also required by
code.


w_tom November 10th 07 05:05 AM

Advice on antenna and installation
 
On Nov 9, 2:12 am, Wes Newell wrote:
So then I should go up on the roof and ground the metal entry pole that
goes into the attic. Then I should also ground the metal wind turbines.
... You're a moron.


Wes Newell's posts are repeatedly justified by mockery rather than
science. From another thread where Wes makes the same claims:
On Nov 6, 3:29 am, Wes Newell wrote:
I never advised anyone of anything. I only provided my experiences
and beliefs. I'll just say that my ungrounded antenna has not been hit
bylightningin the last 38 years. In the year or two prior to that when it
was grounded, it was hit twice, causing considerable damage.


The logic implied by Wes Newell's example also proved Saddam had
WMDs. First the example violates a fundamental principle from
science. To know anything, one must have grasp of the fundamental
principles involved as well as experimental evidence. What Wes has
posted (disconnecting earth grounds) violates well proven science and
electrical principles.

To paraphrase Wes, I ran many stop signs and never had a crash. But
when I was stopped at a stop sign, someone hit me. That proves that
stopping at stop signs is dangerous. So I always run stop signs.

Eliminate both damage and threats to human life by earthing the
antenna. That is obvious even from science 100 years ago. Consult
what professionals do to eliminate damage. Someone even removed
grounds for same reasons that Wes Newell has posted: "Proper Copper
Grounding Systems Stops Lightning Damage at Nebraska FM Station" at
http://www.copper.org/applications/e.../nebraska.html
Based on a belief that "too much" grounding was attracting
lightning strikes, grounding connections on the tower's six
sets of guy wires had been disconnected sometime in the
past. This action may, in fact, have helped direct lightning
discharge current down the antenna tower itself, bringing
the strike closer to the studio/transmitter building.


The original request was about installing grounds for protection.
An application note entitled "The Need for Coordinated Protection"
demonstrates the principles:
http://www.erico.com/public/library/...es/tncr002.pdf

Review it again to appreciate some often overlooked details. The
antenna tower and building are treated as if separate structures. Any
wire entering a structure must first connect to earth ground either
directly or via a protector. The antenna tower has its own single
point earth ground. To enhance protection (because a wire connects
building to tower), then single point grounds for both structures are
interconnected with a buried ground wire.

Even an underground (telephone) wire must meet same earthing
requirements as an overhead wire. Each entering wire in every cable
must connect short (distance is critical) to the structure's earthing
electrode before entering that structure (antenna tower or building).


G-squared November 10th 07 05:18 AM

Advice on antenna and installation
 
On Nov 9, 7:45 pm, w_tom wrote:
On Nov 8, 11:28 am, G-squared wrote:

After seeing how alightningbolt explodes a tree trunk, those

little
ground wires don't 'strike' me as being more than a decoration.
Causing ground loops within the system seems more of a problem

but
maybe because that is every day.


G-squared knows only because he feels? One damning indication?

No
numbers. A responsible source provides numbers for a wire four

time
smaller than those "little ground wires":

... consider that a bare 18 AWG (1 mm diameter) copper wire, in
air, normally will conduct at least 10 amperes safely, with very

low
self-heating temperature rise. If the current slowly rises, the
temperature will increase until the melting temperature of 1065°

C
(1950° F) is achieved at about 83 A. This same temperature could
be reached "instantly" by an 8x20 s pulse at a current of 61 kA.


Above numbers from a 1 Oct 2007 professional engineering

publication
(Electrical Engineering Times); not from random speculation. That
"little ground wire" can be expected to conduct 200,000 amps which

is
ten times more than current from the typically lightning bolt.

G-squared should have been asking a question - not posting
challenges based upon speculation without experience. That

"little
ground wire" is proven sufficient by fundamental theory and by 100+
years of experience all over world. Oh. And it is also required

by
code.


When I start with "I confess...", it hardly qualifies as a
"challenge". What kind of numbers does one do regarding lightning? The
number of hits ? The number of days it _wasn't_ hit ? Not to be snotty
or a wiseass, how much current IS in a 'typical' lightning bolt. I was
working in the transmitter building of a CBS affiliate with a 1100
foot tower when a lightning bolt hit it. The light was impressive -
considering the building had no windows and the sound was the biggest
subwoofer you could imagine. A motorist on a nearby freeway called in
and said 'the WHOLE tower turned blue !'. Is this a typical lightning
bolt or was it unusually large? Would the 18 gauge wire have conducted
the burst to ground or would it have simply vaporized?

It's not as big an issue at our house. California gets comparatively
little lightning. My antenna is only a foot higher than the chimney in
front of it. There are several trees within 50 feet that are 20+ feet
taller.

GG


Tantalust November 10th 07 03:24 PM

Advice on antenna and installation
 
Guys,
please... for next time....

Misspell words like grounding/lightning surge, and especially
suppressor/protector.

Posters in other groups already resort to this to avoid you-know-who's
search engine from chasing down their discussions and infesting them with
his Jehovah's Watchtower grounding deliriums.


--
"There's nothing on it worthwhile, and we're not going to watch it in this
household, and I don't want it in your intellectual diet."
- Philo T. Farnsworth



w_tom November 10th 07 10:10 PM

Advice on antenna and installation
 
On Nov 9, 11:18 pm, G-squared wrote:
... What kind of numbers does one do regarding lightning? The
number of hits ? The number of days it _wasn't_ hit ? ...
Would the 18 gauge wire have conducted the burst to ground
or would it have simply vaporized?


The average lightning strike is 20,000 amps. Since it is a current
source, then voltage will only increase as necessary to make that
current flow. Any most conductive path to earth means less energy
dissipated in the conductor and more energy dissipated harmlessly in
earth.

We don't use 18 AWG wires for earthing even though that small wire
would be sufficient in some cases. We want a wire that is sufficient
for most every direct strike. In AC electric systems, the same ground
wire required for post 1990 National Electrical Code will be more than
sufficient to conduct a direct lightning strike. For telephones, a 12
AWG wire is sufficient.

The rare 200,000 amp strike probably will never be observed by in
their entire life. That 6 AWG should be sufficient (and hot) even
during that most rare event.

Most all trees (95%) struck by lightning have no apparent
indication. Lightning strikes are that common and that unknown.
However a lightning strike that does ignite sugars inside the tree can
create an explosive event. A spark plug only in a car also does not
have sufficient energy to move the car.

How frequent are such events? On average, maybe once every seven
years. Even less in CA. However that number can change significantly
even in the same town. Geology does much to affect that number. One
radio station in the hills over San Jose suffered massive transmitter
damage because lightning connected PG&E 33K volts through the
transformer into their 240 power lines. Just another example of why
earthing of transformers are so important and why that low CA number
can be high in some locations.

In FL where lightning is more serious, then better earthing is
installed. A routine use of Ufer grounds is demonstrated in these
pictures:
http://members.aol.com/gfretwell/ufer.jpg
Major protection costs so little when planned and installed before the
footings are poured. But we still build homes as if the transistor
did not exist. Therefore protection is installed almost as an
afterthought - the earth ground rod.

What determines damage? Well how good is the earthing? Better
earthing with a shortest connection to that earthing means no damage.
Such threats are rare in so many locations. But the simplest
protection costs so little if we integrate an earthing system into
construction; or follow some simple rules such as all incoming wires
must enter and be earthed at the same location. An inexpensive
protection system (proper earthing) means lightning damage would not
exist.

That applies to the antenna as well. Not only should the antenna be
grounded (for human safety and lighting protection). That antenna
wire should route down to the single point earth ground, connect using
a ground block, then rise back up to enter the building.

Is this practical? Well, what is lightning's history in that
neighborhood for the past ten years?


[email protected] November 12th 07 04:57 PM

Advice on antenna and installation
 
Ok, thanks again for the advice. I have decided to play it safe and
go with the group that advised grounding the antenna. Maybe I need
it, maybe I don't, but I'm going to ground it. That said, what
products or tecniques are out there for someone looking to install his
own antenna? My house does have an earth grounding point located just
outside the basement door (giant metal bar stuck in a concrete base
taking it down into the earth.) This is connected to the house
electrical service panel, so I'm very certain that this is what it
is. Is it now simply a matter of connecting a fat wire (solid strand
6awg copper) to the shaft antenna and fastening the other end to this
grounding point? Should I stake a new grounding point on the other
side of the house if it makes the wire run shorter? I am reasonably
handy with tools (multi-lingual instructions for putting together
computer cases/new bicycles don't phase me) and I have an electrical
and computer engineering degree so I know not to lick the electrical
outlets. However, I am also wise enough to know that home electrical
work and electrical engineering are leagues apart, so I turn to those
who may know more than me about codes and common practices and what's
available on the market. Phrase your instructions accordingly. :)
-Will


Wes Newell November 12th 07 06:11 PM

Advice on antenna and installation
 
On Mon, 12 Nov 2007 15:57:49 +0000, larkmore wrote:

Ok, thanks again for the advice. I have decided to play it safe and go
with the group that advised grounding the antenna. Maybe I need it,
maybe I don't, but I'm going to ground it. That said, what products or
tecniques are out there for someone looking to install his own antenna?


If instructions don't come with your antenna, they should be in your TV
manual.

My house does have an earth grounding point located just outside the
basement door (giant metal bar stuck in a concrete base taking it down
into the earth.) This is connected to the house electrical service
panel, so I'm very certain that this is what it is. Is it now simply a
matter of connecting a fat wire (solid strand 6awg copper) to the shaft
antenna and fastening the other end to this grounding point? Should I
stake a new grounding point on the other side of the house if it makes
the wire run shorter? I am reasonably handy with tools (multi-lingual
instructions for putting together computer cases/new bicycles don't
phase me) and I have an electrical and computer engineering degree so I
know not to lick the electrical outlets. However, I am also wise enough
to know that home electrical work and electrical engineering are leagues
apart, so I turn to those who may know more than me about codes and
common practices and what's available on the market. Phrase your
instructions accordingly. :) -Will


http://www.dennysantennaservice.com/1171010.html


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Wes Newell November 12th 07 06:34 PM

Advice on antenna and installation
 
On Mon, 12 Nov 2007 15:57:49 +0000, larkmore wrote:

http://www.channelmaster.com/pdf/AntInstallGuide.pdf

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G-squared November 12th 07 09:30 PM

Advice on antenna and installation
 
On Nov 12, 9:34 am, Wes Newell wrote:
On Mon, 12 Nov 2007 15:57:49 +0000, larkmore wrote:

http://www.channelmaster.com/pdf/AntInstallGuide.pdf

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That link is broken. Is this the one?

http://www.pctinternational.com/chan...stallation.pdf

GG


Wes Newell November 13th 07 08:44 AM

Advice on antenna and installation
 
On Mon, 12 Nov 2007 12:30:42 -0800, G-squared wrote:

On Nov 12, 9:34 am, Wes Newell wrote:
On Mon, 12 Nov 2007 15:57:49 +0000, larkmore wrote:

http://www.channelmaster.com/pdf/AntInstallGuide.pdf

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That link is broken. Is this the one?

http://www.pctinternational.com/chan...ter/0612/pdfs/

guide_AntennaInstallation.pdf

GG


Yep. Looks like the same one.



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common_ [email protected] November 14th 07 03:17 AM

Advice on antenna and installation
 
Wes Newell wrote:

On Fri, 09 Nov 2007 01:30:57 +0000, common_ sense wrote:

But proposing that you should not earth ground a piece of metal sticking
up from the top of ones house,,because your "opinion" thinks it doesn't
need to be done, is insanely stupid, and verging on criminally
irresponsible.


So then I should go up on the roof and ground the metal entry pole that
goes into the attic. Then I should also ground the metal wind turbines.
And lets not forget the all metal chimney cover at the highest location.
You're a moron.

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More life threatening advise from our physics impaired friend Wes.


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