anyone use a t2fd here? i'm considering replacing my longwire with a
t2fd-- but i can't mount it on a slope-- will i be wasting my time and
money?

= = = On Feb 13, 9:28Â*pm, "tom k in L.A."
= = = wrote:
-
- anyone use a t2fd here? Â*
- i'm considering replacing my longwire with a t2fd
- but i can't mount it on a slope
- will i be wasting my time and money?

Tom K in LA,

Shortwave Listening (SWL) Antennas from the "T2FD" to
the "Windom" to the Inverted "L" Antenna
http://groups.yahoo.com/group/Shortw.../message/12277

Remember that the original design critiera for the
Terminated Tilted Folded Dipole (T2FD / TTFD) was
for both a Transmitting and Receiving Antenna.

* Terminated - To make it poor on any one Frequency
and average across many Frequencies.
* Tilted - To give it variable Wave Length 'Heigth"
above the Ground {Surface} and thus more Broad-Banded
across many Frequencies.
* Folded - Another Broad-Banded aspect over a Single Dipole.
* Dipole - Balance and usable on the Harmonics
of the lowest design {cut} Frequency.

Original designed for its Broad-Banded Transmitting
characteristics and the fact that it also worked about
as well as a Broad-Banded Receiving Antenna.

READ - Why Tilt ? - The Terminated Tilted Folded Dipole
(TTFD / T2FD) Antenna
http://groups.yahoo.com/group/Shortw...a/message/9085
http://groups.google.com/group/rec.r...6f135c9a1ff3d4
Part # 2 {Reply} Why Tilt the T2FD Antenna
http://groups.google.com/group/rec.r...1a382dcfd0b599
Part # 3 {Reply} Horizontal & Vertical Dipole Antennas
http://groups.google.com/group/rec.r...5a29ea49a79aa9
Part # 4 {Reply} T2FD Antennas - What's Out There . . .
http://groups.google.com/group/rec.r...1e739d018d90f2

READ - Shortwave Listener's (SWL) Dipole {T2FD} Antenna
that is built with common TV type Parts - 300 Ohm Twin Lead etc
http://groups.yahoo.com/group/Shortw...a/message/2955
http://groups.google.com/group/rec.r...7684e390585424
ABOUT - Making a SWL Antenna out of 300 Ohm Twin Lead and TV Coax
Cable
http://groups.google.com/group/rec.r...54ef37af697129

The-Bottom-Line - If the Shortwave Antenna is not Tilted :
Then it is NOT a Terminated TILTED Folded Dipole (TTFD /
T2FD) Antenna [.]

Need to Go "FLAT" {Horizontal} and can not 'Tilt' your
Shortwave Antenna : Then consider the Windom Antenna
as a Multi-Band {Broad-Bandedd} -alternative to- the T2FD
Antenna.

READ - Build A Four (4) Wire Windom Antenna For
Shortwave Listening (SWL)
http://groups.google.com/group/rec.r...b82b8338fed2a6

READ - Windom -vice- Dipole which is the better SWL Antenna ? ? ?
http://groups.yahoo.com/group/Shortw...nna/message/80
http://groups.google.com/group/rec.r...475be3a848a708
http://groups.google.com/group/rec.r...bd8dbdaed416b2

ABOUT - The original "WINDOM" Antenna and more . . .
http://groups.yahoo.com/group/Shortw...a/message/6582
http://groups.google.com/group/rec.r...83d7aab64996cb
http://groups.google.com/group/rec.r...88118b5d7355a9

READ - Multi-Band Shortwave Listener (SWL) Antennas :
Windom - Dipole - Random Wire
http://groups.yahoo.com/group/Shortw...a/message/6595
http://groups.google.com/group/rec.r...0383999b8c1f94

QUESTION - What Will . . .
My Second Shortwave Listener (SWL) Antenna Be ? ? ?
http://groups.google.com/group/rec.r...e30053633904d9

=OR= Why Not Stick With What You Have - And Improve It ! ! !
1 - First a simple Longwire {Random Wire} Antenna
2 - Modified to an Inverted "L" Antenna
3 - Up-graded to a "Low Noise" Inverted "L" Antenna
4 - Re-Arranged {Re-Positioned} into a Far-End-Fed
"Low Noise" Inverted "L" Antenna

QUESTION - Is 'it' a Longwire {Random Wire} Antenna
-or- Inverted "L" Antenna ?
http://groups.yahoo.com/group/Shortw...a/message/6300
http://groups.google.com/group/rec.r...364956151adbba

WHY - The Inverted "L" Antenna ?
http://groups.google.com/group/rec.r...b3ddbed819958d

READ - The Next Step - The Low Noise Inverted "L"
{Random Wire} Antenna
http://groups.google.com/group/rec.r...4e78044fafe71e
http://groups.google.com/group/rec.r...ff7ab457d5966c

WHY - The Far-End-Fed Shortwave Listener's (SWLs) Inverted "L"
Antenna
http://groups.yahoo.com/group/Shortw.../message/11698
http://groups.google.com/group/rec.r...cfc6b9cb2447c0

A Second Look : The WellBrook lay-out for a Low Noise Antenna
http://groups.yahoo.com/group/Shortw...a/message/4856
http://groups.google.com/group/rec.r...ecfc2f91fe5c7e
http://groups.google.com/group/rec.r...f72ca458581b9c


from 't2fd' to 'windom' to inverted 'l' antenna - iane ~ RHF {pomkia}
.
Shortwave Listener (SWL) Antennas Group = http://tinyurl.com/ogvcf
GoTo = http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
The SWL Antenna Discussion Group = http://tinyurl.com/ogvcf
Shortwave Listener (SWL) Antenna HELP = http://tinyurl.com/ogvcf
Shortwave Listener (SWL) Antenna NEWS = http://tinyurl.com/ogvcf
Shortwave Listener (SWL) Antenna INFO = http://tinyurl.com/ogvcf
* * * All Are Welcome : Including ELMERS and 'Want-to-be-Elmers'
plus plain old "Mister-Know-It-Alls"; and even those Newbees with
"I Know This Is A Really Dumb Question - But _ _ _ _ _ _ _ _ "
.
The Shortwave Listener's Blessing :
SWL BLESSING = http://tinyurl.com/s2bjm
May You Never Tire of Listening to the Radio and Always
have Strong Signals and Noise Free Reception ~ RHF {ibid}
http://groups.yahoo.com/group/Shortw...a/message/9233
.
Tous Sont Bienvenus ! - - - Groupe par Radio
d'auditeur d'onde courte pour des Antennes de SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
Alle Sind Willkommen ! - - - Shortwave Radiozuhörer
Gruppe für SWL Antennen
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
Tutti Sono Benvenuti ! - - - Gruppo Radiofonico
dell'ascoltatore di onda corta per le Antenne di SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
Todos São Bem-vindos ! - - - Grupo de Rádio
do ouvinte do Shortwave para Antenas de SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
Ð’Ñ�е Ð*адушны ! - - - Группа оператора
на приеме коротковолнового диапазона
Radio дл� Aнтенн SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
¡Todos Son Agradables! - - - Grupo de Radio del oyente
de la onda corta para las Antenas de SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
= = = = Plain Old American-English Translation = = = =
All are Welcome - - - To Join the Shortwave Listeners
(SWL) Antenna Group on YAHOO !
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
|
|
|
/ \
........!.......

On 13 Feb 2007 21:28:18 -0800, "tom k in L.A."
wrote:

anyone use a t2fd here? i'm considering replacing my longwire with a
t2fd-- but i can't mount it on a slope-- will i be wasting my time and
money?

It'll still outperform almost any other wire antenna

In article .com,
"tom k in L.A." wrote:

anyone use a t2fd here? i'm considering replacing my longwire with a
t2fd-- but i can't mount it on a slope-- will i be wasting my time and
money?

It would be a good move. Sloping it is not important.

--
Telamon
Ventura, California

On Feb 14, 7:57 pm, Telamon
wrote:
In article .com,
"tom k in L.A." wrote:

anyone use a t2fd here? i'm considering replacing my longwire with a
t2fd-- but i can't mount it on a slope-- will i be wasting my time and
money?

It would be a good move. Sloping it is not important.

--
Telamon
Ventura, California

really? some people feel strongly about the sloping. elaborate
telamon-- if i can get 1/2 the reception you do i will be a happy
pappy!

In article .com,
"tom k in L.A." wrote:

On Feb 14, 7:57 pm, Telamon
wrote:
In article .com,
"tom k in L.A." wrote:

anyone use a t2fd here? i'm considering replacing my longwire with a
t2fd-- but i can't mount it on a slope-- will i be wasting my time and
money?

It would be a good move. Sloping it is not important.


really? some people feel strongly about the sloping. elaborate
telamon-- if i can get 1/2 the reception you do i will be a happy
pappy!

This antenna originated as a ship broadband antenna where there are
stays that could be used as an antenna if insulated. The stays on a ship
slope. Generally for reception higher is better so I would nix the
sloping idea.

You can build a simple folded dipole antenna out of TV 300 ohm twin lead
and use a common 300 to 75 ohm BALUN. The TV/FM BALUN transformers are
not all created equal. Some are poor below 15MHz. The BALUN units with
more heft indicate a bigger core that will work well down into the AMBCB
band. The twin lead will not support itself so you could tie-wrap it to
nylon cord or rope. It would be good if the antenna was at least 40 foot
long and longer would be better.

If this works well for you then go to the trouble of building a larger
capture area antenna.

--
Telamon
Ventura, California

On Feb 15, 6:30 pm, Telamon
wrote:
In article .com,
"tom k in L.A." wrote:

On Feb 14, 7:57 pm, Telamon
wrote:
In article .com,
"tom k in L.A." wrote:

anyone use a t2fd here? i'm considering replacing my longwire with a
t2fd-- but i can't mount it on a slope-- will i be wasting my time and
money?

It would be a good move. Sloping it is not important.

really? some people feel strongly about the sloping. elaborate
telamon-- if i can get 1/2 the reception you do i will be a happy
pappy!

This antenna originated as a ship broadband antenna where there are
stays that could be used as an antenna if insulated. The stays on a ship
slope. Generally for reception higher is better so I would nix the
sloping idea.

You can build a simple folded dipole antenna out of TV 300 ohm twin lead
and use a common 300 to 75 ohm BALUN. The TV/FM BALUN transformers are
not all created equal. Some are poor below 15MHz. The BALUN units with
more heft indicate a bigger core that will work well down into the AMBCB
band. The twin lead will not support itself so you could tie-wrap it to
nylon cord or rope. It would be good if the antenna was at least 40 foot
long and longer would be better.

If this works well for you then go to the trouble of building a larger
capture area antenna.

--
Telamon
Ventura, California

Telamon,

Yes 300 Ohm TV type Twin-Lead will work for a Quik-and-Dirty T2FD.
To simply construction - Instead of a single 450 Ohm Resistor in the
Center of the upper T2FD Antenna Element with the 4:1 Balun in the
Center of the Lower T2FD Antenna Element. Put a 220 Ohm Resistor
at each end of the Twin-Lead.

And Yes Again - You are right that the better quality 300 Ohm to
75 Ohm TV type Matching Transformers {Baluns} can work down
to at least 5 MHz and as you point out these are usually the larger
diameter ones which have a bigger Ferrite Cord, which is the key
performance difference, besides increasing the number of windings.

IIRC - John Doty wrote about using the Binocular Ferrite Cores from
TY type Matching Transformers and -re-winding them with more
windings to get better performance across the Shortwave (HF)
Bands and down into the AM/MW Band. - - - Searching . . .

The "Perfect" Feed-in-Line for Wire Shortwave Listening (SWL)
Antennas
http://www.hard-core-dx.com/nordicdx...eed/coax2.html
-by- John Doty ) -Source- Hard-Cord-DX.Com
* It Doesn't Take Very Much Wire
* The Problem
* The Solution
* Construction
* Mount the Transformer
* Drive a Ground Stake
* How It Works, In More Detail
* If the Impedances of Two . . .
* In My Antenna System
* Performance
-Source- Hard-Cord-DX.Com -by- John Doty )
http://www.hard-core-dx.com/nordicdx...eed/coax2.html

TIP - Re-Construction of a TV Parts Matching Transformer {Balun}
into a Shortwave Listeners (SWL) Matching Transformer {Balun}
http://www.hard-core-dx.com/nordicdx...eed/coax2.html
-by- John Doty )
* My Antenna and Feed System are built with Television Antenna System
Components and other common hardware. These Parts are inexpensive and
easily obtainable in most places.
* The Matching Transformer {Balun} is built around a Toroid {Ferrite
Core} extracted from a TV 300 Ohm to 75 Ohm "Matching Transformer". If
you're a pack rat like me, you have a few in your basement: you
typically get one with every TV or VCR (or you can buy one). Pop the
plastic case off and snip the wires from the Toroid (it looks either
like a tiny donut, or a pair of tiny donuts stuck together).
* The Matching Transformer {Balun} Windings should be made with thin
Wi I use #32 Magnet Wire. The Primary is 30 Turns while the
Secondary is 10 Turns.
* For a One-Hole Toroid, count each passage of the Wire down through
the Hole as One Turn. For a Two-Holer, each Turn is a passage of the
Wire down through the Right Hole and up through the Left.
http://www.hard-core-dx.com/nordicdx...eed/coax2.html

READ - Install Your Shortwave Listener (SWL) Antenna Properly
http://www.hard-core-dx.com/nordicdx...eed/coax2.html
The Antenna System is the 'key' to Reception at Shortwave Frequencies.
- From: John Doty )
- Date: February 11, 1995
- Original source: Usenet's Rec.Radio.Shortwave

CHECK-OUT - The John Doty 'Reading List" at Hard-Core-DX.Com
Other Hard-Cord-DX.Com Articles -by- John Doty to Read
JPD READING LIST = http://tinyurl.com/3amvw6
One Shortwave Listeners (SWLs) Un-Ending Pursuit of
More Signal and Less Noise
http://www.google.com/custom?domains...D%3A1%3B&hl=en


sometimes i even supprise myself - iane ~ RHF

In article .com,
"RHF" wrote:

On Feb 15, 6:30 pm, Telamon
wrote:
In article .com,
"tom k in L.A." wrote:

On Feb 14, 7:57 pm, Telamon
wrote:
In article .com,
"tom k in L.A." wrote:

anyone use a t2fd here? i'm considering replacing my longwire with a
t2fd-- but i can't mount it on a slope-- will i be wasting my time
and
money?

It would be a good move. Sloping it is not important.

really? some people feel strongly about the sloping. elaborate
telamon-- if i can get 1/2 the reception you do i will be a happy
pappy!

This antenna originated as a ship broadband antenna where there are
stays that could be used as an antenna if insulated. The stays on a ship
slope. Generally for reception higher is better so I would nix the
sloping idea.

You can build a simple folded dipole antenna out of TV 300 ohm twin lead
and use a common 300 to 75 ohm BALUN. The TV/FM BALUN transformers are
not all created equal. Some are poor below 15MHz. The BALUN units with
more heft indicate a bigger core that will work well down into the AMBCB
band. The twin lead will not support itself so you could tie-wrap it to
nylon cord or rope. It would be good if the antenna was at least 40 foot
long and longer would be better.

If this works well for you then go to the trouble of building a larger
capture area antenna.


Telamon,

Yes 300 Ohm TV type Twin-Lead will work for a Quik-and-Dirty T2FD.
To simply construction - Instead of a single 450 Ohm Resistor in the
Center of the upper T2FD Antenna Element with the 4:1 Balun in the
Center of the Lower T2FD Antenna Element. Put a 220 Ohm Resistor
at each end of the Twin-Lead.

I would not use resistors at all. They are not desirable for a folded
dipole.

And Yes Again - You are right that the better quality 300 Ohm to
75 Ohm TV type Matching Transformers {Baluns} can work down
to at least 5 MHz and as you point out these are usually the larger
diameter ones which have a bigger Ferrite Cord, which is the key
performance difference, besides increasing the number of windings.

IIRC - John Doty wrote about using the Binocular Ferrite Cores from
TY type Matching Transformers and -re-winding them with more
windings to get better performance across the Shortwave (HF)
Bands and down into the AM/MW Band. - - - Searching . . .

You can more inductance with short lengths of wire with a binocular
core. They make excellent transmission line transformers.

--
Telamon
Ventura, California

On 15 Feb 2007 18:05:53 -0800, "tom k in L.A."
wrote:

On Feb 14, 7:57 pm, Telamon
wrote:
In article .com,
"tom k in L.A." wrote:

anyone use a t2fd here? i'm considering replacing my longwire with a
t2fd-- but i can't mount it on a slope-- will i be wasting my time and
money?

It would be a good move. Sloping it is not important.

--
Telamon
Ventura, California

really? some people feel strongly about the sloping. elaborate
telamon-- if i can get 1/2 the reception you do i will be a happy
pappy!

The closer to 45 degrees the more omnidirectional the antenna.
Otherwise just broadside it to the major directions of interest.

On Feb 14, 12:28 am, "tom k in L.A." wrote:
anyone use a t2fd here? i'm considering replacing my longwire with a
t2fd-- but i can't mount it on a slope-- will i be wasting my time and
money?

I replaced my EF-SWL with an RF Systems T2FD cropped to 35' and the
difference was amazing. Stations which were heard but noisy became
enjoyable, and stations which I didn't know were there popped out, not
strong but good enough to listen to.

Don't worry about the slope. It helps make the antenna more
omnidirectional above all but its certainly not required to get good
results.