RHF wrote:
On Jul 23, 3:36 pm, RHF wrote:
On Jul 22, 3:59 pm, D Peter Maus wrote:





RHF wrote:
How Do They Compare For Shortwave Listening (SWL) ?
Eavesdropper-C Trapped Dipole Antenna
* Overall Length about 43 Feet (13.1 Metres).
http://www.universal-radio.com/catalog/sw_ant/0680.html
http://www.antennasupermarket.com/EAVESDROPPER.htm
http://www.durhamradio.com/s/product...at=1845&page=1
Any one using a Eavesdropper Trapped Dipole Antenna ?
[ For Shortwave Listening (SWL) ]
Or for that matter an Alpha Delta DX-Ultra Shortwave Antenna ?
* Overall Length about 80 Feet (25 Metres).
http://www.durhamradio.com/s/product...at=1845&page=1
http://www.universal-radio.com/catalog/sw_ant/3377.html
http://www.alphadeltacom.com/pg1.htm
Anyone used both for Shortwave Listening (SWL) ?
Anyone tried them both Side-by-Side ?
[ For Shortwave Listening (SWL) ]
.
.
. .
= = = On Jul 21, 2:48 pm, RHF wrote:
On Jul 21, 1:25 pm, dxAce wrote:
I finally got my old Eavesdropper dipole antenna up in the air again in
preparation for the 2007/2008 DX season. I've not had it installed since about
1990 or so. Seemed to be OK in preliminary tests.
Tomorrow, I'll try to finish the coax installation into the house.
I have it oriented 150/330 degrees, main interest was to hopefully get better
South American reception.
dxAce
Michigan
USA
- oriented 150/330 degrees
DX Ace - Is this 150* Tip-to-Tip 330* -or-
150* & 330* perpendicular to the Sides ? ~ RHF
Eavesdropper-C Trapped Dipole Antenna
* Overall Length about 43 Feet (13.1 Metres).http://www.universal-radio.com/catal...http://www.ant...
Any one else using a Eavesdropper Trapped Dipole Antenna ?
Or for that matter an Alpha Delta DX-Ultra Shortwave Antenna ?
* Overall Length about 80 Feet (25 Metres).http://www.durhamradio.com/s/product...5&cat=1845&pag...
Anyone used both ?
Anyone tried them both Side-by-Side ?
.
.
. .
I have both an Eavesdropper and a DX Ultra.
The Eavesdropper is setup in an inverted V configuration and is
virtually omnidirectional. It's got a small footprint. Takes up little
real estate. It's also very quiet.
The DX Ultra is very large. And correctly set up according to A-D
recommendations, it's also very tall, and visible over the second story
of my house.
Both need to be erected far from the house, to eliminate noise
sources.
DX Ultra is very sensitive. Not quite as quiet as the
Eavesdropper....likely due more to the smaller capture area of the
Eavesdropper than anything else. The DX Ultra also has a lower
practical frequency limit than the Eavesdropper. Although you don't
really notice it so much on MW because of the huge powers at play.
I've been able to overload my receivers on the DX Ultra, but not
the Eavesdropper.
If you have the real estate, the DX Ultra is the better choice for
most listening. If not, the Eavesdropper is fine.- Hide quoted text -
- Show quoted text -
DPM - Thank You for the Interesting and Informative
personal assessment of both of these high quality
Shortwave Radio Listening (SWL) Antennas.

Any other Eavesdropper Trapped Dipole Antenna or
Alpha Delta DX-Ultra Shortwave Antenna owner users
out-there with comments of info ? -cause-

i want to know - iane ~ RHF
.
.
. .- Hide quoted text -

- Show quoted text -


OK - So here is another Question :

Given a small urban-suburban Lot with Limited Space.

Mounting one of these two Dipoles with the Center at
the Corner of the Lot with each of the Arms extended
alone adjacent sides {Right Angle} and Sloping down.

Would this Antenna now function more or less like :

1 - A single Inverted "V" Dipole Antenna ?

2 - Two Sloper Antennas set at Right-Angles to each other ?

What would your choice be # 1 or # 2 ?

pondering the imponderable - iane ~ RHF
.
.
. .



A-S claims Eavesdroppers have been mounted horizontally, as inverted
V, as slopers, in attics, and around corners. All with good results. For
the most part, it's omni directional. I"m not sure that Ace is going to
see much of a directional characteristic at his venue. What there may
be, may be relatively small.

On Jul 24, 4:03 am, RHF wrote:
On Jul 23, 3:36 pm, RHF wrote:





On Jul 22, 3:59 pm, D Peter Maus wrote:

RHF wrote:
How Do They Compare For Shortwave Listening (SWL) ?

Eavesdropper-C Trapped Dipole Antenna
* Overall Length about 43 Feet (13.1 Metres).
http://www.universal-radio.com/catalog/sw_ant/0680.html
http://www.antennasupermarket.com/EAVESDROPPER.htm
http://www.durhamradio.com/s/product...at=1845&page=1

Any one using a Eavesdropper Trapped Dipole Antenna ?
[ For Shortwave Listening (SWL) ]

Or for that matter an Alpha Delta DX-Ultra Shortwave Antenna ?
* Overall Length about 80 Feet (25 Metres).
http://www.durhamradio.com/s/product...at=1845&page=1
http://www.universal-radio.com/catalog/sw_ant/3377.html
http://www.alphadeltacom.com/pg1.htm

Anyone used both for Shortwave Listening (SWL) ?

Anyone tried them both Side-by-Side ?
[ For Shortwave Listening (SWL) ]
.
.
. .

= = = On Jul 21, 2:48 pm, RHF wrote:
On Jul 21, 1:25 pm, dxAce wrote:

I finally got my old Eavesdropper dipole antenna up in the air again in
preparation for the 2007/2008 DX season. I've not had it installed since about
1990 or so. Seemed to be OK in preliminary tests.
Tomorrow, I'll try to finish the coax installation into the house.
I have it oriented 150/330 degrees, main interest was to hopefully get better
South American reception.
dxAce
Michigan
USA
- oriented 150/330 degrees

DX Ace - Is this 150* Tip-to-Tip 330* -or-
150* & 330* perpendicular to the Sides ? ~ RHF

Eavesdropper-C Trapped Dipole Antenna
* Overall Length about 43 Feet (13.1 Metres).http://www.universal-radio.com/catal...http://www.ant...

Any one else using a Eavesdropper Trapped Dipole Antenna ?

Or for that matter an Alpha Delta DX-Ultra Shortwave Antenna ?
* Overall Length about 80 Feet (25 Metres).http://www.durhamradio.com/s/product...5&cat=1845&pag...

Anyone used both ?

Anyone tried them both Side-by-Side ?
.
.
. .

I have both an Eavesdropper and a DX Ultra.

The Eavesdropper is setup in an inverted V configuration and is
virtually omnidirectional. It's got a small footprint. Takes up little
real estate. It's also very quiet.

The DX Ultra is very large. And correctly set up according to A-D
recommendations, it's also very tall, and visible over the second story
of my house.

Both need to be erected far from the house, to eliminate noise
sources.

DX Ultra is very sensitive. Not quite as quiet as the
Eavesdropper....likely due more to the smaller capture area of the
Eavesdropper than anything else. The DX Ultra also has a lower
practical frequency limit than the Eavesdropper. Although you don't
really notice it so much on MW because of the huge powers at play.

I've been able to overload my receivers on the DX Ultra, but not
the Eavesdropper.

If you have the real estate, the DX Ultra is the better choice for
most listening. If not, the Eavesdropper is fine.- Hide quoted text -

- Show quoted text -

DPM - Thank You for the Interesting and Informative
personal assessment of both of these high quality
Shortwave Radio Listening (SWL) Antennas.

Any other Eavesdropper Trapped Dipole Antenna or
Alpha Delta DX-Ultra Shortwave Antenna owner users
out-there with comments of info ? -cause-

i want to know - iane ~ RHF
.
.
. .- Hide quoted text -

- Show quoted text -

OK - So here is another Question :

Given a small urban-suburban Lot with Limited Space.

Mounting one of these two Dipoles with the Center at
the Corner of the Lot with each of the Arms extended
alone adjacent sides {Right Angle} and Sloping down.

Would this Antenna now function more or less like :

1 - A single Inverted "V" Dipole Antenna ?

2 - Two Sloper Antennas set at Right-Angles to each other ?

What would your choice be # 1 or # 2 ?

pondering the imponderable - iane ~ RHF
.
.
. .- Hide quoted text -

- Show quoted text -


The Question is still out there . . .
Anyone care to venture and Answer ?

OK - So here is another Question :

Given a small urban-suburban Lot with Limited Space.


Mounting one of these two Dipoles with the Center at
the Corner of the Lot with each of the Arms extended
alone adjacent sides {Right Angle} and Sloping down.


Would this Antenna now function more or less like :


1 - A single Inverted "V" Dipole Antenna ?


2 - Two Sloper Antennas set at Right-Angles to each other ?


What would your choice be # 1 or # 2 ?


pondering the imponderable - iane ~ RHF

On Jul 26, 12:59 am, RHF wrote:

The Question is still out there . . .
Anyone care to venture and Answer ?

I will try, but the answer is simplistic (probably overly so) and
could well be wrong-o.

Given a small urban-suburban Lot with Limited Space.

Mounting one of these two Dipoles with the Center at
the Corner of the Lot with each of the Arms extended
alone adjacent sides {Right Angle} and Sloping down.

Would this Antenna now function more or less like :

1 - A single Inverted "V" Dipole Antenna ?

2 - Two Sloper Antennas set at Right-Angles to each other ?

What would your choice be # 1 or # 2 ?

pondering the imponderable - iane ~ RHF

My guess, and this is because the antenna remains connected at the
center (as opposed to two slopers which would presumably have no
inherent electrical connection) is that it would function more as No.
1. However, because the configuration would force the antenna to be
mounted at an angle, I suspect that the reception pattern would be
askew, not only horizontally but vertically as well. The side lobes
would likely aim upward on the side facing into the yard, and downward
on the side aiming outward from the corner. If you want to get
skywave from the direction of the yard, that could be a very good
thing, although I'm not sure that practically it would make a big
difference.

This is not all that different from what I have, although the legs on
my antenna are only off 180 degrees by a fraction (maybe 10 degrees)
rather than at right angles.

Bruce Jensen

On Jul 26, 7:37 am, bpnjensen wrote:
On Jul 26, 12:59 am, RHF wrote:

The Question is still out there . . .
Anyone care to venture and Answer ?

I will try, but the answer is simplistic (probably overly so) and
could well be wrong-o.

Given a small urban-suburban Lot with Limited Space.

Mounting one of these two Dipoles with the Center at
the Corner of the Lot with each of the Arms extended
alone adjacent sides {Right Angle} and Sloping down.

Would this Antenna now function more or less like :

1 - A single Inverted "V" Dipole Antenna ?

2 - Two Sloper Antennas set at Right-Angles to each other ?

What would your choice be # 1 or # 2 ?

pondering the imponderable - iane ~ RHF

My guess, and this is because the antenna remains connected at the
center (as opposed to two slopers which would presumably have no
inherent electrical connection) is that it would function more as No.
1. However, because the configuration would force the antenna to be
mounted at an angle, I suspect that the reception pattern would be
askew, not only horizontally but vertically as well. The side lobes
would likely aim upward on the side facing into the yard, and downward
on the side aiming outward from the corner. If you want to get
skywave from the direction of the yard, that could be a very good
thing, although I'm not sure that practically it would make a big
difference.

This is not all that different from what I have, although the legs on
my antenna are only off 180 degrees by a fraction (maybe 10 degrees)
rather than at right angles.

Bruce Jensen

BpnJ - Good Answer - I honestly don't know "if"
It is Right or Wrong -but- It is a Good Answer. )

tyvm ~ RHF

On Jul 26, 2:05 pm, bpnjensen wrote:
On Jul 26, 1:10 pm, RHF wrote:





The Question is still out there . . .
Anyone care to venture and Answer ?

I will try, but the answer is simplistic (probably overly so) and
could well be wrong-o.

Given a small urban-suburban Lot with Limited Space.

Mounting one of these two Dipoles with the Center at
the Corner of the Lot with each of the Arms extended
alone adjacent sides {Right Angle} and Sloping down.

Would this Antenna now function more or less like :

1 - A single Inverted "V" Dipole Antenna ?

2 - Two Sloper Antennas set at Right-Angles to each other ?

What would your choice be # 1 or # 2 ?

pondering the imponderable - iane ~ RHF

My guess, and this is because the antenna remains connected at the
center (as opposed to two slopers which would presumably have no
inherent electrical connection) is that it would function more as No.
1. However, because the configuration would force the antenna to be
mounted at an angle, I suspect that the reception pattern would be
askew, not only horizontally but vertically as well. The side lobes
would likely aim upward on the side facing into the yard, and downward
on the side aiming outward from the corner. If you want to get
skywave from the direction of the yard, that could be a very good
thing, although I'm not sure that practically it would make a big
difference.

This is not all that different from what I have, although the legs on
my antenna are only off 180 degrees by a fraction (maybe 10 degrees)
rather than at right angles.

Bruce Jensen

BpnJ - Good Answer - I honestly don't know "if"
It is Right or Wrong -but- It is a Good Answer. )

tyvm ~ RHF

- Glad you like it! Something else I thought of...
- just thinkin' out loud here...

- One more thing to consider is that (at least as I understand it),
- when portions of your antenna slope, either as a sloper or as
- an inverted V, you get some lobing off the upward sides of the
- slopes as well, so that overall your antenna winds up being
- more omnidirectional - or at least has lobes in more directions
- than just broadside.

BpnJ,

You are right - A Dipole Antenna only functions as
a Dipole when it is 'cut' to size and 'mounted' at the
right Height and 'rigged' Flat. Then it is usually
consider lossy Off-the-Ends and best Off-the-Sides.

When notheing else changes except 'reducing' the
Height of the Ends : Then the Arms of the Dipole
have a Negative {Down} Slope toward the Ends
-and- the reception Off-the-Ends improves.

As the Slope increases and the Apex Angle goes
from 180* {Flat} to 120* {30* Slope} to 90* {45* Slope}
the Dipole goes from what is consider a Bi-Directional
Antenna to an Omni-Directional Antenna.

- In this regard, an Inverted V dipole may not be so
- different from two slopers mounted back to back
- and either harnessed or phased...so, although the
- system you describe may electrically be more like
- No. 1, the two may not be all that different from one
- another in practice.

Yes to my way of think taken together both would
perfrom about the same.

But the key thing as you correctly point out is
that Electrically it is still wired as a Dipole with
a Common Feed-in-Line and that is why it is not
Two Slopers -because- If it were you would be
able to select one or the other or both and use
them as two independent Antennas. Especially
when they are Rigged in a Corner at 90*.

SO - My Conclusion After Thinking About It Is :
A Corner Rigged Dipole Antenna was Don't
Waste the Time -and- Instead install a Pair
of Flat Wires or Slopers with two separate
Feed-in-Lines so that you could get the benefit
of each Antenna's use independently.

- Now, if you take that and bend it 90 degrees
- horizintally in the middle...well, I can't say that
- I know for certain. It would be fun to see a
- measured lobe pattern for these configs,
- especially when many people in this situation
- might want to give it a try.
- BJ

The so-called 'half-a-swastika' shaped Dipole
Antenna is usually executed Across a Diagonal
{Two Corners} and along the sides of a small
piece of property : So the Bend is 45* and it
looks like a "Z" when viewed from the top.
- - - It requires 4-Support Points and for the
effort a Loop Antenna could be the better
choice.

~ RHF

On Jul 21, 1:25 pm, dxAce wrote:
I finally got my old Eavesdropper dipole antenna up in the air again in
preparation for the 2007/2008 DX season. I've not had it installed since about
1990 or so. Seemed to be OK in preliminary tests.

Tomorrow, I'll try to finish the coax installation into the house.

I have it oriented 150/330 degrees, main interest was to hopefully get betterSouthAmerican reception.

dxAce
Michigan
USA

DX Ace,

How Long is the Length of your Coax Cable run for
this Eavesdropper Dipole Antenna into the House ?

What is your Eavesdropper Dipole Antenna's
Mounting Height at the Center and the Tips ?

Did you consider to Eavesdropper Dipole Antenna
with the 72 Ohm Balanced feed-in-line when buying
it back in the 1990s ?

iwtk ~ RHF

RHF wrote:

On Jul 21, 1:25 pm, dxAce wrote:
I finally got my old Eavesdropper dipole antenna up in the air again in
preparation for the 2007/2008 DX season. I've not had it installed since about
1990 or so. Seemed to be OK in preliminary tests.

Tomorrow, I'll try to finish the coax installation into the house.

I have it oriented 150/330 degrees, main interest was to hopefully get betterSouthAmerican reception.

DX Ace,

How Long is the Length of your Coax Cable run for
this Eavesdropper Dipole Antenna into the House ?

Around 60' or so.

What is your Eavesdropper Dipole Antenna's
Mounting Height at the Center and the Tips ?

Only about 16', which is 7' higher than my other antennas.

Did you consider to Eavesdropper Dipole Antenna
with the 72 Ohm Balanced feed-in-line when buying
it back in the 1990s ?

My first Eavesdropper had the 72 Ohm feed back in the 80's.