= = = "Jack Painter" wrote in message
= = = news:owNpd.4394$SA.57@lakeread02...
"RHF" wrote
You may wish to consider moving the Feed-Point from the Center of
Two Equal Arms to an Off-Center Feed-Point with a Short-Arm of 38%
and a Long-Arm of 62% of the Total Length of the Antenna. This
type 'configuration' of Wire Antenna is called a "WINDOM" Antenna.

RHF: Windom style antennas are transmitting gimmicks that use the vertical
component of the antenna as an added radiator for wider band coverage than a
dipole (without a tuner that is) would otherwise have. No windom antenna has
any added receive benefits whatsoever. I would say it has no place in SWL at
all for that matter, there being many easier to install and general coverage
receive antennas available.

best regards,

Jack


JP,

ABOUT - Shortwave Listeners (SWLers) and Shortwave Listening (SWLing)
'part' of the SWLers' FUN is:
- Simply Listening to "What Is Out There" )
- Buying; Seting-Up, Using and Modifying the SWL Equipment )
- Buying, Building (Thinking About & Planning SWL Antenna )
and for some Posting here on Rec.Radio.Shortwave etc )

IMHO: If a SWL can Buy/Build some form of Windom Antenna and ENJOY
using it to Listen to Shortwave - Then the Windom Antenna has a
'place' in Shortwave Listening.

* KISAP Broadband Shortwave Listeners' (SWL) Windom Antenna
http://groups.yahoo.com/group/Shortw...a/message/1511
Shortwave Listener "SWL" {300 Ohm Twin Lead} Windom Antenna
- Long-Arm 'cut' for the 49 Meter Shortwave Band = 38.54 Feet
- Short-Arm 'cut' for the 31 Meter Shortwave Band = 24.13 Feet
- Vertical-Leg 'cut' for the 19 Meter Shortwave Band = 15.15 Feet
- Mount/Rig this Antenna at a Height of 30.3 Feet with the Vertical
Leg and Coax Cable Feed-in-Line coming down Straight and Vertical.
- TV 300 Ohm to 75 Ohm Matching Transformer (Balun)
- TV 75 Ohm Coax Cable Feed-in-Line
NOTE: The 300 Ohm Twin Lead froms a 'continious loop of wire'
in the shape (outline) of a small 't'. The Ends of the Loop are
connected to the 300 Ohm Ends of the Matching Transformer.

iane ~ RHF
..
..

"RHF" wrote in message
m...
= = = "Lucky" wrote in message
= = = ...

I'm using 300Ohm Twinlead as an ant hooked up to a 4:1 current balun.
But, the lead is NOT split and divided like a dipole but can't just
as it is together.

Is it still functioning exactly as a bad dipole?
I'm getting great reception, low noise. I just don't want to limit
myself with a dipole.

Lucky


LUCKY,

Hey - What Works - WORKS ! )

What you appear to have is a Center-Fed ZEPP Antenna or "T" Antenna.

Using a Balun (Matching Transformer) and Coax Cable Feed-in-Line
makes it an 'improved' Low Noise Antenna.

You may wish to consider moving the Feed-Point from the Center of
Two Equal Arms to an Off-Center Feed-Point with a Short-Arm of 38%
and a Long-Arm of 62% of the Total Length of the Antenna. This
type 'configuration' of Wire Antenna is called a "WINDOM" Antenna.

Three to Read:

* Need an Off-Center Fed SWL Antenna consider a Windom type design
http://groups.yahoo.com/group/Shortw...a/message/1582
- The ORIGINAL Windom Antenna
- The Improved "Low Noise" Windom Antenna
- The "Dipole" Windom Antenna
- The "G5RV" Windom Antenna

* KISAP Broadband Antenna Questions
http://groups.yahoo.com/group/Shortw...a/message/1511
Shortwave Listener "SWL" {300 Ohm Twin Lead} Windom Antenna
- Long-Arm 'cut' for the 49 Meter Shortwave Band = 38.54 Feet
- Short-Arm 'cut' for the 31 Meter Shortwave Band = 24.13 Feet
- Vertical-Leg 'cut' for the 19 Meter Shortwave Band = 15.15 Feet
- Mount/Rig this Antenna at a Height of 30.3 Feet with the Vertical
Leg and Coax Cable Feed-in-Line coming down Straight and Vertical.
- TV 300 Ohm to 75 Ohm Matching Transformer (Balun)
- TV 75 Ohm Coax Cable Feed-in-Line
NOTE: The 300 Ohm Twin Lead froms a 'continious loop of wire'
in the shape (outline) of a small 't'. The Ends of the Loop are
connected to the 300 Ohm Ends of the Matching Transformer.

* A Few "Ready-Made" Windom Antennas
http://groups.yahoo.com/group/Shortw...a/message/1583


iane ~ RHF
.
.
Some Say: On A Clear Day You Can See Forever.
http://groups.yahoo.com/group/Shortw...na/message/502
I BELIEVE: On A Clear Night...
You Can Hear Forever and Beyond - The BEYOND !
.
.

On thing I should make clear is that this twinlead is NOT center fed at all.
I'm using the lead just like a long wire except the ends of the twinL are
separate and not connected and it's hooked up to a balun in the room, not
outside. Only coax from balun to beautiful radio.

Lucky

Lucky wrote:

On thing I should make clear is that this twinlead is NOT center fed at all.
I'm using the lead just like a long wire except the ends of the twinL are
separate and not connected and it's hooked up to a balun in the room, not
outside. Only coax from balun to beautiful radio.

Lucky

What you have is a twinlead feed line to nowhere. You need some kind of
wiring on the far end of the twinlead to have a real antenna. If you
connected a wire to each of the wires in the end of the twinlead and
extended those wires in opposite directions, you would have a
traditional dipole. However 300-ohm twinlead should be connected to a
folded dipole antenna for a proper impedance match. A simple two wire
dipole {not folded} matches to 50-ohm coax lead better than a 300-ohm
twinlead. In that case you don't need the twinlead at all.


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