Jim Williams wrote:

If I run a wire out the window to a tree near the house, do I also
need to run a ground wire to the ground outside?

Does an outside wire perform better if it's grounded or is it a safety
precaution (or both)?

It's mainly a safety issue, since you can't make a good RF signal ground
for the type of antenna you're considering (random wire or inverted-L),
*unless* you use the technique on the following website:

http://www.anarc.org/naswa/badx/ante...e_antenna.html

An RF signal ground needs to be short. Several feet of ground wire is
too much. That's why the grounding method on the website (above) works
so well. The ground wire to the rod is very short. Mine is about
12-inches.

Even if you're not interested in reducing noise with a good RF ground,
it's still a good idea to have some kind of ground for lightning or just
static electricity. I suggest you install a ground rod near the location
where the antenna wire comes inside the house. Connect a lightning
arrestor between the antenna lead wire and the rod. Better yet, build
the antenna design on the website above. This method helps to reduce
noise from domestic appliances such as televisions and computers.


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I'm curious as to how you can have such a short lead to the ground
rod? It's more than 12" from my radios to the window. Doesn't the
ground wire connect to the ground connection on the radios?

Thanks,
Dan



On Wed, 21 Apr 2004 02:27:19 -0400, starman wrote:

Jim Williams wrote:

If I run a wire out the window to a tree near the house, do I also
need to run a ground wire to the ground outside?

Does an outside wire perform better if it's grounded or is it a safety
precaution (or both)?

It's mainly a safety issue, since you can't make a good RF signal ground
for the type of antenna you're considering (random wire or inverted-L),
*unless* you use the technique on the following website:

http://www.anarc.org/naswa/badx/ante...e_antenna.html

An RF signal ground needs to be short. Several feet of ground wire is
too much. That's why the grounding method on the website (above) works
so well. The ground wire to the rod is very short. Mine is about
12-inches.

Even if you're not interested in reducing noise with a good RF ground,
it's still a good idea to have some kind of ground for lightning or just
static electricity. I suggest you install a ground rod near the location
where the antenna wire comes inside the house. Connect a lightning
arrestor between the antenna lead wire and the rod. Better yet, build
the antenna design on the website above. This method helps to reduce
noise from domestic appliances such as televisions and computers.


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-----== Over 100,000 Newsgroups - 19 Different Servers! =-----

Dan Graves wrote:

I'm curious as to how you can have such a short lead to the ground
rod? It's more than 12" from my radios to the window. Doesn't the
ground wire connect to the ground connection on the radios?

Thanks,
Dan

The inverted-L antenna design we've been talking about uses a coax lead
which goes to a box near the ground rod. The coax doesn't go up to the
end of the antenna wire overhead. There is a single wire coming down
from one end of the horizontal section of the antenna to the matching
transformer, located in the box near the ground. This allows for a
really short ground wire from the box to the rod. That's why mine is
only 12-inches. Since the coax shield is grounded outside at the box and
rod, there isn't any need for a seperate ground wire to the receiver.
The receiver gets grounded by the coax shield where it connects to the
receiver's antenna input.


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Hey starman,

I am still trying to digest the material on the website you listed. I even
found another website that referrences this one, and has pictures. I am
still not clear on the purpose of the 30turn/10turn matching transformer
inside the shielded box. What does this accomplish that a 300/75 ohm
matching transformer between 300 ohm twinlead and 75 ohnm coax would not?
Also I am planning on grounding the shield of the coax to a grounding stake
at the "base" of the antenna, as soon as the coax comes near enough to the
ground to do this. How can I do better than that, for a ground?

I do appreciate your patience.
"starman" wrote in message
...
Jim Williams wrote:

If I run a wire out the window to a tree near the house, do I also
need to run a ground wire to the ground outside?

Does an outside wire perform better if it's grounded or is it a safety
precaution (or both)?

It's mainly a safety issue, since you can't make a good RF signal ground
for the type of antenna you're considering (random wire or inverted-L),
*unless* you use the technique on the following website:

http://www.anarc.org/naswa/badx/ante...e_antenna.html

An RF signal ground needs to be short. Several feet of ground wire is
too much. That's why the grounding method on the website (above) works
so well. The ground wire to the rod is very short. Mine is about
12-inches.

Even if you're not interested in reducing noise with a good RF ground,
it's still a good idea to have some kind of ground for lightning or just
static electricity. I suggest you install a ground rod near the location
where the antenna wire comes inside the house. Connect a lightning
arrestor between the antenna lead wire and the rod. Better yet, build
the antenna design on the website above. This method helps to reduce
noise from domestic appliances such as televisions and computers.


-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
-----== Over 100,000 Newsgroups - 19 Different Servers! =-----

Dave wrote:

Hey starman,

I am still trying to digest the material on the website you listed. I even found another website that referrences this one, and has pictures. I am
still not clear on the purpose of the 30turn/10turn matching transformer
inside the shielded box. What does this accomplish that a 300/75 ohm
matching transformer between 300 ohm twinlead and 75 ohnm coax would not?

The homemade matching transformer described on the website(s) is
designed to work best at shortwave frequencies and AM(MW) too. A generic
TV transformer (balun) is intended for a higher range of frequencies and
usually doesn't work well below about 10-Mhz. The TV ferrite core is
made with a material that operates best at TV frequencies. The website
mentions removing the core from a TV balun for making the shortwave
transformer but I recommend getting a type '43' material for the core.
You can try a TV balun to see how well you receive the lower shortwave
bands. It will almost certainly not perform well on the AM broadcast
band. However as someone mentioned, this could be an advantage if you
have a lot of strong AM stations in your area that interfere with
shortwave reception.

Also I am planning on grounding the shield of the coax to a grounding stake at the "base" of the antenna, as soon as the coax comes near enough to the ground to do this. How can I do better than that, for a ground?

The low noise antenna on the website is the best way to achieve a good
RF ground for an inverted-L (random wire). This is because the antenna
end of the coax is located close to the ground. Otherwise you should
ground the shield of the coax when it first comes near the ground. This
will require the grounding block I mentioned in the previous post.

I do appreciate your patience.
"starman" wrote in message
...
Jim Williams wrote:

If I run a wire out the window to a tree near the house, do I also
need to run a ground wire to the ground outside?

Does an outside wire perform better if it's grounded or is it a safety
precaution (or both)?

It's mainly a safety issue, since you can't make a good RF signal ground
for the type of antenna you're considering (random wire or inverted-L),
*unless* you use the technique on the following website:

http://www.anarc.org/naswa/badx/ante...e_antenna.html

An RF signal ground needs to be short. Several feet of ground wire is
too much. That's why the grounding method on the website (above) works
so well. The ground wire to the rod is very short. Mine is about
12-inches.

Even if you're not interested in reducing noise with a good RF ground,
it's still a good idea to have some kind of ground for lightning or just
static electricity. I suggest you install a ground rod near the location
where the antenna wire comes inside the house. Connect a lightning
arrestor between the antenna lead wire and the rod. Better yet, build
the antenna design on the website above. This method helps to reduce
noise from domestic appliances such as televisions and computers.


-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
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-----== Over 100,000 Newsgroups - 19 Different Servers! =-----

DAVE,

An OutSide Ground for Better Safety and more . . .
http://groups.yahoo.com/group/Shortw...na/message/206

The "Grounding-Point" = Ground Rods and Ground Wires ETC.
http://groups.yahoo.com/group/Shortw...na/message/425

The "Primary" Antenna Grounding Point
and the 'secondary' Shack Grounding Point
http://groups.yahoo.com/group/Shortw...na/message/503

TBL: Build your Antenna and Radio System from... the Ground Up )

iane ~ RHF
..
..
= = = "Dave" wrote in message
= = = ...
Hey starman,

I am still trying to digest the material on the website you listed. I even
found another website that referrences this one, and has pictures. I am
still not clear on the purpose of the 30turn/10turn matching transformer
inside the shielded box. What does this accomplish that a 300/75 ohm
matching transformer between 300 ohm twinlead and 75 ohnm coax would not?
Also I am planning on grounding the shield of the coax to a grounding stake
at the "base" of the antenna, as soon as the coax comes near enough to the
ground to do this. How can I do better than that, for a ground?

I do appreciate your patience.
"starman" wrote in message
...
Jim Williams wrote:

If I run a wire out the window to a tree near the house, do I also
need to run a ground wire to the ground outside?

Does an outside wire perform better if it's grounded or is it a safety
precaution (or both)?

It's mainly a safety issue, since you can't make a good RF signal ground
for the type of antenna you're considering (random wire or inverted-L),
*unless* you use the technique on the following website:

http://www.anarc.org/naswa/badx/ante...e_antenna.html

An RF signal ground needs to be short. Several feet of ground wire is
too much. That's why the grounding method on the website (above) works
so well. The ground wire to the rod is very short. Mine is about
12-inches.

Even if you're not interested in reducing noise with a good RF ground,
it's still a good idea to have some kind of ground for lightning or just
static electricity. I suggest you install a ground rod near the location
where the antenna wire comes inside the house. Connect a lightning
arrestor between the antenna lead wire and the rod. Better yet, build
the antenna design on the website above. This method helps to reduce
noise from domestic appliances such as televisions and computers.


-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
-----== Over 100,000 Newsgroups - 19 Different Servers! =-----

Thank you. I'll check these out later on today.

Dave


"RHF" wrote in message
om...
DAVE,

An OutSide Ground for Better Safety and more . . .
http://groups.yahoo.com/group/Shortw...na/message/206

The "Grounding-Point" = Ground Rods and Ground Wires ETC.
http://groups.yahoo.com/group/Shortw...na/message/425

The "Primary" Antenna Grounding Point
and the 'secondary' Shack Grounding Point
http://groups.yahoo.com/group/Shortw...na/message/503

TBL: Build your Antenna and Radio System from... the Ground Up )

iane ~ RHF
.
.
= = = "Dave" wrote in message
= = = ...
Hey starman,

I am still trying to digest the material on the website you listed. I
even
found another website that referrences this one, and has pictures. I am
still not clear on the purpose of the 30turn/10turn matching transformer
inside the shielded box. What does this accomplish that a 300/75 ohm
matching transformer between 300 ohm twinlead and 75 ohnm coax would
not?
Also I am planning on grounding the shield of the coax to a grounding
stake
at the "base" of the antenna, as soon as the coax comes near enough to
the
ground to do this. How can I do better than that, for a ground?

I do appreciate your patience.
"starman" wrote in message
...
Jim Williams wrote:

If I run a wire out the window to a tree near the house, do I also
need to run a ground wire to the ground outside?

Does an outside wire perform better if it's grounded or is it a
safety
precaution (or both)?

It's mainly a safety issue, since you can't make a good RF signal
ground
for the type of antenna you're considering (random wire or
inverted-L),
*unless* you use the technique on the following website:

http://www.anarc.org/naswa/badx/ante...e_antenna.html

An RF signal ground needs to be short. Several feet of ground wire is
too much. That's why the grounding method on the website (above) works
so well. The ground wire to the rod is very short. Mine is about
12-inches.

Even if you're not interested in reducing noise with a good RF ground,
it's still a good idea to have some kind of ground for lightning or
just
static electricity. I suggest you install a ground rod near the
location
where the antenna wire comes inside the house. Connect a lightning
arrestor between the antenna lead wire and the rod. Better yet, build
the antenna design on the website above. This method helps to reduce
noise from domestic appliances such as televisions and computers.


-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
-----== Over 100,000 Newsgroups - 19 Different Servers! =-----

Radials are better than a ground rod and no sledge hammer required.

"starman" wrote in message
...
Jim Williams wrote:

If I run a wire out the window to a tree near the house, do I also
need to run a ground wire to the ground outside?

Does an outside wire perform better if it's grounded or is it a safety
precaution (or both)?

It's mainly a safety issue, since you can't make a good RF signal ground
for the type of antenna you're considering (random wire or inverted-L),
*unless* you use the technique on the following website:

http://www.anarc.org/naswa/badx/ante...e_antenna.html

An RF signal ground needs to be short. Several feet of ground wire is
too much. That's why the grounding method on the website (above) works
so well. The ground wire to the rod is very short. Mine is about
12-inches.

Even if you're not interested in reducing noise with a good RF ground,
it's still a good idea to have some kind of ground for lightning or just
static electricity. I suggest you install a ground rod near the location
where the antenna wire comes inside the house. Connect a lightning
arrestor between the antenna lead wire and the rod. Better yet, build
the antenna design on the website above. This method helps to reduce
noise from domestic appliances such as televisions and computers.


-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
-----== Over 100,000 Newsgroups - 19 Different Servers! =-----