TM,

Good Accessment of the BroomStick Antenna.

iane ~ RHF
..
..
= = = Tony Meloche
= = = wrote in message ...
CW wrote:

I won't go into detail but the broomstick (or any helicaly wound antenna)
gives up performance for size. The straiter the wire, the better off you
are. If you have the space, just stretch it out strait.


Experimentation and experience have taught me that this is
basically correct. "Broomstick" antennas give pretty good performance
in a very compact space - they are even (marginally) "portable". But
for signal-pulling ability, they'll never beat a well-thought-out
longwire or randomwire. If you can tuck a one-meter broomstick into
your car somewhere for traveling, you've got the world
by the butt for shortwave listening away from home. But at home - your
"permanent space" - go with a random or longwire, if you possibly can.

Tony

..

The currrent in the wire produces an electromagnetic field which has a
defined radius.


The field coil of a motor is used to turn it into a magnet so the motor will
work...stretch out the windings, no emf imposed upon the core..no
magnet-action-no work


Stretch it out, you exceed the radius of the electromagnetic field, no
interaction, no function.

The whole purpose of the antenna in coil-structure is to use the induced emf
to create a load on the antenna so it "thinks" it is longer

Yodar


"Dave" wrote in message
...
I just got through picking up a ton of discontinued wire from my local
Home
Depot, and was planning on building a "broomstick" antenna like some I
found
described on the net. Got a question though: doesn't "stretching out" the
coil to a meter or more reduce the inductance of the resulting coil? Why
wouldn't it work better to just leave it on the spool? I was under the
impression that the formula for calculating the inductance for a given
coil
involved multiplying the square of the number of coils by the ratio of the
coil width to length. Wouldn't this mean that a "longer" coil would have
a
lower inductance than a "shorter" coil, given the same length of wire and
approximate diameter of coils?

Forgive me if I'm being stupid here, it has been twenty years since I have
attempted anything like this, but that was what I thought.

The main account I am thinking of was related by someone in Saudi Arabia
who
wrapped 1.2 kM of wire around a piece of PVC and vastly improved their
reception of WWV in the states. I was going to do something similar, and
then looked at the two spools of wire that I was about to unwrap. They
are
already coils, so shouldn't I be able to just hook them up to an aligator
clip and stick this to my whip antenna? (I am now thinking about taking
the
wire off of the smaller spool and adding it to the larger. Shouldn't that
work?) And if I leave the wire on the spools (which are plastic) couldn't
I
turn them toward or away from the station of interest to further improve
reception? (I could even put this in my attic, gaining a few feet of
elevation and hiding it from my unappreciative wife.)

Any input on any part of this idea is more than welcome. I would greaty
value the opinions of those who have actually done something like one of
these two options.

Thanks,

Dave

"Joe Strain" wrote in message
om...
The currrent in the wire produces an electromagnetic field which has a
defined radius.


The field coil of a motor is used to turn it into a magnet so the motor
will
work...stretch out the windings, no emf imposed upon the core..no
magnet-action-no work


Stretch it out, you exceed the radius of the electromagnetic field, no
interaction, no function.

The whole purpose of the antenna in coil-structure is to use the induced
emf
to create a load on the antenna so it "thinks" it is longer

Yodar


Read this a couple days ago, and am still trying to wrap my brain around it.
Will try to reply in more depth 12/25 or 12/26

Dave




"Dave" wrote in message
...
I just got through picking up a ton of discontinued wire from my local
Home
Depot, and was planning on building a "broomstick" antenna like some I
found
described on the net. Got a question though: doesn't "stretching out"
the
coil to a meter or more reduce the inductance of the resulting coil?
Why
wouldn't it work better to just leave it on the spool? I was under the
impression that the formula for calculating the inductance for a given
coil
involved multiplying the square of the number of coils by the ratio of
the
coil width to length. Wouldn't this mean that a "longer" coil would
have
a
lower inductance than a "shorter" coil, given the same length of wire
and
approximate diameter of coils?

Forgive me if I'm being stupid here, it has been twenty years since I
have
attempted anything like this, but that was what I thought.

The main account I am thinking of was related by someone in Saudi Arabia
who
wrapped 1.2 kM of wire around a piece of PVC and vastly improved their
reception of WWV in the states. I was going to do something similar,
and
then looked at the two spools of wire that I was about to unwrap. They
are
already coils, so shouldn't I be able to just hook them up to an
aligator
clip and stick this to my whip antenna? (I am now thinking about taking
the
wire off of the smaller spool and adding it to the larger. Shouldn't
that
work?) And if I leave the wire on the spools (which are plastic)
couldn't
I
turn them toward or away from the station of interest to further improve
reception? (I could even put this in my attic, gaining a few feet of
elevation and hiding it from my unappreciative wife.)

Any input on any part of this idea is more than welcome. I would greaty
value the opinions of those who have actually done something like one of
these two options.

Thanks,

Dave

DAVE,

Concerning the BroomStick Antenna:
http://www.hard-core-dx.com/nordicdx.../bromstik.html
http://www.hard-core-dx.com/nordicdx...al/broom2.html
http://www.hard-core-dx.com/nordicdx.../tunestik.html
http://www.hard-core-dx.com/nordicdx.../tunstik2.html

IIRC: The 1.2kM of wire was wrapped on a piece of PVC Pipe
http://www.hard-core-dx.com/nordicdx...al/broom3.html
- - - "improved model is 6 m (18Ft) of 4 Inch OD PVC"
(Section of Well Lining that was over 18 Foot Long.)
= = = Effectively a 18 Foot Vertical Antenna.
"I mounted the 6 m (18Ft) portion vertically, and the 2.5 m (7.5 Ft)
section horizontally (a "reverted "L"" system). I added in my 250 m
(750 Ft) Random Long Wire (it was there, so why not use it?), grounded
the thing and in great anticipation, plugged it into the radio.
- - - The results were more than amazing." - by Marty Leipzig

HELLO! Forget the BroomStick [.]
TBL: This Guy had a 750 Ft Random Wire Antenna !

When your 'think' of a Broom Stick Antenna that has a size small
wire tightly wrapped along a length of PVC Pipe. Just consider
the piece of PVC Pipe an equal section of Aluminum Tubing; and
not much more.

Better to try a Eight Foot Section of 2"-3" PVC Pipe with a
single wire wrapped in three coils on it.
* Use a 500 Foot Spool of #14 AWG Insulated 19 Stranded Wire.
* Each "Coil" set to resonate at a different band of your choice.
* Each "Coil" spaced 1'-2' apart on the PVC Pipe.

IMHO: The BrommStick Antenna is a 'good idea' for Apartment
Residents stuck with a single outside facing window.
- - - Been There, Done That !

REMEMBER: The ANTENNA + GROUND SYSTEM is . . .
55.5% of the Radio/Receiver and Antenna+Ground Reception Equation.
GoTo= http://groups.yahoo.com/group/SWL-AM...na/message/288

All are WELCOME at this "Antenna Ashram"
+ Who Seek Better Reception
+ + And a Clear Understanding
+ + + From That Which Transcends the Ether and Beyond.

WHE "SWL Antennas and AM & FM Antennas" eGroup on YAHOO !
- When You NEED to Contemplate the
- - "Aerial High" and the
- - - "True Meaning of Ground".


iane ~ RHF
..
..
= = = "Dave"
= = = wrote in message ...
I just got through picking up a ton of discontinued wire from my local Home
Depot, and was planning on building a "broomstick" antenna like some I found
described on the net. Got a question though: doesn't "stretching out" the
coil to a meter or more reduce the inductance of the resulting coil? Why
wouldn't it work better to just leave it on the spool? I was under the
impression that the formula for calculating the inductance for a given coil
involved multiplying the square of the number of coils by the ratio of the
coil width to length. Wouldn't this mean that a "longer" coil would have a
lower inductance than a "shorter" coil, given the same length of wire and
approximate diameter of coils?

Forgive me if I'm being stupid here, it has been twenty years since I have
attempted anything like this, but that was what I thought.

The main account I am thinking of was related by someone in Saudi Arabia who
wrapped 1.2 kM of wire around a piece of PVC and vastly improved their
reception of WWV in the states. I was going to do something similar, and
then looked at the two spools of wire that I was about to unwrap. They are
already coils, so shouldn't I be able to just hook them up to an aligator
clip and stick this to my whip antenna? (I am now thinking about taking the
wire off of the smaller spool and adding it to the larger. Shouldn't that
work?) And if I leave the wire on the spools (which are plastic) couldn't I
turn them toward or away from the station of interest to further improve
reception? (I could even put this in my attic, gaining a few feet of
elevation and hiding it from my unappreciative wife.)

Any input on any part of this idea is more than welcome. I would greaty
value the opinions of those who have actually done something like one of
these two options.

Thanks,

Dave


..

Thanks for the links. The website for the first four was where I got my
original information, but I couldn't remember where it was. I appreciate
it.

Thanks also for hte Yahoo link. I'm going to check that out.

Dave


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

Concerning the BroomStick Antenna:
http://www.hard-core-dx.com/nordicdx.../bromstik.html
http://www.hard-core-dx.com/nordicdx...al/broom2.html
http://www.hard-core-dx.com/nordicdx.../tunestik.html
http://www.hard-core-dx.com/nordicdx.../tunstik2.html

IIRC: The 1.2kM of wire was wrapped on a piece of PVC Pipe
http://www.hard-core-dx.com/nordicdx...al/broom3.html
- - - "improved model is 6 m (18Ft) of 4 Inch OD PVC"
(Section of Well Lining that was over 18 Foot Long.)
= = = Effectively a 18 Foot Vertical Antenna.
"I mounted the 6 m (18Ft) portion vertically, and the 2.5 m (7.5 Ft)
section horizontally (a "reverted "L"" system). I added in my 250 m
(750 Ft) Random Long Wire (it was there, so why not use it?), grounded
the thing and in great anticipation, plugged it into the radio.
- - - The results were more than amazing." - by Marty Leipzig

HELLO! Forget the BroomStick [.]
TBL: This Guy had a 750 Ft Random Wire Antenna !

When your 'think' of a Broom Stick Antenna that has a size small
wire tightly wrapped along a length of PVC Pipe. Just consider
the piece of PVC Pipe an equal section of Aluminum Tubing; and
not much more.

Better to try a Eight Foot Section of 2"-3" PVC Pipe with a
single wire wrapped in three coils on it.
* Use a 500 Foot Spool of #14 AWG Insulated 19 Stranded Wire.
* Each "Coil" set to resonate at a different band of your choice.
* Each "Coil" spaced 1'-2' apart on the PVC Pipe.

IMHO: The BrommStick Antenna is a 'good idea' for Apartment
Residents stuck with a single outside facing window.
- - - Been There, Done That !

REMEMBER: The ANTENNA + GROUND SYSTEM is . . .
55.5% of the Radio/Receiver and Antenna+Ground Reception Equation.
GoTo= http://groups.yahoo.com/group/SWL-AM...na/message/288

All are WELCOME at this "Antenna Ashram"
+ Who Seek Better Reception
+ + And a Clear Understanding
+ + + From That Which Transcends the Ether and Beyond.

WHE "SWL Antennas and AM & FM Antennas" eGroup on YAHOO !
- When You NEED to Contemplate the
- - "Aerial High" and the
- - - "True Meaning of Ground".


iane ~ RHF
.
.
= = = "Dave"
= = = wrote in message ...
I just got through picking up a ton of discontinued wire from my local
Home
Depot, and was planning on building a "broomstick" antenna like some I
found
described on the net. Got a question though: doesn't "stretching out"
the
coil to a meter or more reduce the inductance of the resulting coil?
Why
wouldn't it work better to just leave it on the spool? I was under the
impression that the formula for calculating the inductance for a given
coil
involved multiplying the square of the number of coils by the ratio of
the
coil width to length. Wouldn't this mean that a "longer" coil would
have a
lower inductance than a "shorter" coil, given the same length of wire
and
approximate diameter of coils?

Forgive me if I'm being stupid here, it has been twenty years since I
have
attempted anything like this, but that was what I thought.

The main account I am thinking of was related by someone in Saudi Arabia
who
wrapped 1.2 kM of wire around a piece of PVC and vastly improved their
reception of WWV in the states. I was going to do something similar,
and
then looked at the two spools of wire that I was about to unwrap. They
are
already coils, so shouldn't I be able to just hook them up to an
aligator
clip and stick this to my whip antenna? (I am now thinking about taking
the
wire off of the smaller spool and adding it to the larger. Shouldn't
that
work?) And if I leave the wire on the spools (which are plastic)
couldn't I
turn them toward or away from the station of interest to further improve
reception? (I could even put this in my attic, gaining a few feet of
elevation and hiding it from my unappreciative wife.)

Any input on any part of this idea is more than welcome. I would greaty
value the opinions of those who have actually done something like one of
these two options.

Thanks,

Dave


.

"Dave" wrote in
:

I just got through picking up a ton of discontinued wire from my local
Home Depot, and was planning on building a "broomstick" antenna like
some I found described on the net.

I built one. I was quite disappointed after reading all the hype.

I get better reception from a wire run around the corners of my
bedroom ceiling.

"donutbandit" wrote in message
...
"Dave" wrote in
:

I just got through picking up a ton of discontinued wire from my local
Home Depot, and was planning on building a "broomstick" antenna like
some I found described on the net.

I built one. I was quite disappointed after reading all the hype.

I get better reception from a wire run around the corners of my
bedroom ceiling.
I woul not anticipate the broomstick antenna to be any different than a
metal tube or rod of similar dimensions.

Dale W4OP

In article ,
"Dale Parfitt" wrote:

"donutbandit" wrote in message
...
"Dave" wrote in
:

I just got through picking up a ton of discontinued wire from my
local Home Depot, and was planning on building a "broomstick"
antenna like some I found described on the net.

I built one. I was quite disappointed after reading all the hype.

I get better reception from a wire run around the corners of my
bedroom ceiling.

I would not anticipate the broomstick antenna to be any different than
a metal tube or rod of similar dimensions.

Good comparison. A tightly wound broomstick would resemble a rod for
receiving purposes.

--
Telamon
Ventura, California

"Telamon" wrote in message
...
In article ,
"Dale Parfitt" wrote:

"donutbandit" wrote in message
...
"Dave" wrote in
:

I just got through picking up a ton of discontinued wire from my
local Home Depot, and was planning on building a "broomstick"
antenna like some I found described on the net.

I built one. I was quite disappointed after reading all the hype.

I get better reception from a wire run around the corners of my
bedroom ceiling.

I would not anticipate the broomstick antenna to be any different than
a metal tube or rod of similar dimensions.

Good comparison. A tightly wound broomstick would resemble a rod for
receiving purposes.

--
Telamon
Ventura, California

Still true, even if each turn of wire is insulated from those adjacent to
it? How could that be?

Thanks,

Dave

DAVE,

Understanding the "BroomStick" Antenna and its Coil.
= WHY = Three Shorter Coils may Work Better then One Long Coil.

First: Lets take a Eight Foot (8Ft) piece of One Inch (1") Outside
Diameter (OD) PVC Pipe. (This is our BroomStick Antenna "FORM".)

Second: Take a Single piece of #14 AWG Stranded Insulated Wire
and stretch it out along the length of the PVC Pipe.
What Do We Have? A Vertical Antenna Element - That happens to
be 1/4 of a Wave Length (WL) in the range of 31 MHz.

Third: Take a Single piece of #14 AWG Stranded Insulated Wire
and stretch it out along the length of the PVC Pipe and form a
Coil of 11 Turns (about 1") at the Bottom. What Do We Have?
A "LOADED" Vertical Antenna Element - That happens to act like
1/4 of a Wave Length (WL) in the range of 10 MHz.

Fourth: Take a Single piece of #14 AWG Stranded Insulated Wire
and stretch it out along the length of the PVC Pipe and form a
Coil of 66 Turns (about 6") at the Bottom. What Do We Have?
A "LOADED" Vertical Antenna Element - That happens to act like
1/4 of a Wave Length (WL) in the range of 1 MHz.

Fifth: Take a Single piece of #14 AWG Stranded Insulated Wire
and stretch it out along the length of the PVC Pipe and form a
Coil of 460 Turns (about 2Ft) at the Bottom. What Do We Have?
A "LOADED" Vertical Antenna Element - That happens to act like
1/4 of a Wave Length (WL) for about 100 kHz.

CONCLUSION: The Conclusion That We Must Draw From The Above Is:
That the common BroomStick Antenna that has wire closely wound
on a piece of PVC Pipe to FORM a Coil of 3Ft, 5Ft, or all of
the 8Ft; must be resonant well below 100 kHz.

THEREFO Therefore for 31 MHz, 10 MHz, 1MHz and anything
in-between: The BroomStick Antenna simply looks effectively like
a 1/4 WL Antenna Element that works so-so in the range of 31 MHz.
= = = Effectively like a 1" Copper Pipe.

BETTER: The Better Alternative is to Start over by taking a
Eight Foot (8Ft) piece of One Inch (1") Outside Diameter (OD)
PVC Pipe. (This is our BroomStick Antenna "FORM".)
Next, take a single piece of #14 AWG Stranded Insulated Wire
and wrap three coils on the PVC Pipe.

* "Concerning the BroomStick Antenna" Read Message #410
GoTo= http://groups.yahoo.com/group/SWL-AM...na/message/410

* "Image of Tri-Band 'BroomStick' Antenna"
GoTo= http://groups.yahoo.com/group/SWL-AM...na/message/412

PHOTOS Section: Image "BroomStick Antenna Tri-Band"
GoTo= http://photos.groups.yahoo.com/group...FM-Antenna/lst


iane ~ RHF
..
..
= = = "Dave"
= = = wrote in message ...
"Telamon" wrote in message
...
In article ,
"Dale Parfitt" wrote:

"donutbandit" wrote in message
...
"Dave" wrote in
:

I just got through picking up a ton of discontinued wire from my
local Home Depot, and was planning on building a "broomstick"
antenna like some I found described on the net.

I built one. I was quite disappointed after reading all the hype.

I get better reception from a wire run around the corners of my
bedroom ceiling.

I would not anticipate the broomstick antenna to be any different
than a metal tube or rod of similar dimensions.

Good comparison. A tightly wound broomstick would resemble a
rod for receiving purposes.

--
Telamon
Ventura, California

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Still true, even if each turn of wire is insulated from those
adjacent to it? How could that be?

Thanks,

Dave



..