= = = (Mike) wrote in message
= = = . com...
I currently am using an Alpha Delta DX-Ultra mounted at 70' sloping to
about 15 feet above ground. This antenna in this configuration is
noisy. I am considering an Alpha Delta DX-SWL or maybe a vertical
antenna. I know the height is a bit much, but the higher it goes the
more antenna I can get on my property. I even used this antenna in an
inverted "V" configuration with much noise. So if you had an area you
could easily mount an antenna 70' in the air what would you go with
that would not be noisy. I like to have this antenna work on the
tropical bands.
This antenna is suspended from a tree using a pulley system.
Thanks to all
If I find a solution the DX-Ultra will be sold...anyone interested?


MM,

Remove (Take-Down) your Alpha Delta DX-Ultra (ADDXU) Antenna.

Run /Route a Coax Cable from your Radio to a "Spot" at the 'base'
of the Tree (Top Tie-Off Point) -or- the Bottom Tie-Off Point
of your ADDXU; which ever is closer to your Radio's location.

At this "Spot" install a Ground Rod and Wire.

Buy a SWL Matching Transformer (Balun-UnUn-MLB)
and 'mount' the MT on the Ground Rod.

Buy some Wire for an Antenna Element. (Chose One)
- Run/Route the Wire UP the Tree and (Sloping) DOWN to the
Bottom Tie-Off Point and secure it.
[ Think of this as a Vertical-Fed "7" Laying on it's Side ]
- Run/Route the Wire UP (Sloping) to the Tree Top
Tie-Off Point and secure it.
[ This a common Bottom-to-Top "Sloper' ]
- Run/Route the Wire UP (Sloping) to the Tree Top and
DOWN to a near-ground Tie-Off Point at the base of the
Tree and secure it.
[ Think of this as a Sloper-Fed "7" Laying on it's Side ]

Connect the Wire Antenna Element; Ground Wire; and
Coax Cable to the Matching Transformer.

NOTE: Since you state that you are having High RFI/EMF
Noise Levels. You may wish to consider "Burying" your
Coax Cable Feed-in-Line from the Antenna to your House.
OR - You may wish to consider a Feed-in-Line Isolator
(1:1 Matching Transformer) at the point that your Coax Cable
enters your house. A second Grounding Point (Ground Rod)
could also be used here.

INFO - Low Noise Antenna using the Universal Magnetic Balun
and the Antenna Feeder Isolator - by Wellbrook Communications
http://www.wellbrook.uk.com/longwire.html
DIAGRAM - The Correct Way To Install A Longwire Antenna/Balun

READ - Antennas - Five Things to Consider : Antenna, Balun, Ground, Coax & Planning
http://groups.yahoo.com/group/Shortw...a/message/1544


ABOUT - The Alpha Delta DX-Ultra (Dipole) and DX-SWL (Sloper) Antennas
http://usa.shortwavestore.com/shortwave-antennas.html
http://www.alphadeltacom.com/pg1.htm

Installation Instructions - Alpha Delta DX-Ultra (Dipoles) Antennas
http://www.alphadeltacom.com/dxlb_ii.htm
http://www.rys.nl/dxultra.html

Alpha Delta DX-SWL (Sloper) Antenna
http://www.alphadeltacom.com/pg7.htm

Installation Instructions - Alpha Delta DX-SWL Antennas
http://www.alphadeltacom.com/dxswlii.htm
Optimum 'mounting Height of 25 Feet (Top)
with the Bottom-End at 8-9 Feet above ground.
http://www.rys.nl/addxswl_ii.htm

Quarter Wave Length (1/4WL) Slopers - Here's How to Do it RIGHT !
Wanna Work Some GREAT Low Band DX in Limited Space Area ?
http://www.alphadeltacom.com/qw_slopers.html


Which is Better ? The Quarter Wave Length (1/4WL) Sloper Antennas
or the Inverted "V" Dipole Antennas
- presented by Alpha Delta Communications Inc.
http://www.alphadeltacom.com/pdf/slo...inverted_v.pdf


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 !
..
..