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Old July 24th 05, 07:53 PM
Bob
 
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Default Dipole in the trees

I've got plenty of trees to hang up a dipole for 40 meters and feed it with
ladder line. Power level = 100 Watts.
What's the opinion(s) on the wires contacting leaves, especially near the
end points? Better to use plastic insulated wire rather than enameled wire?


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Old July 24th 05, 09:28 PM
H. Adam Stevens, NQ5H
 
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Better to hang the wire in the clear.

Otherwise, test lead wire is ususlly good to 15 KV.

73
H.


"Bob" wrote in message
...
I've got plenty of trees to hang up a dipole for 40 meters and feed it
with
ladder line. Power level = 100 Watts.
What's the opinion(s) on the wires contacting leaves, especially near the
end points? Better to use plastic insulated wire rather than enameled
wire?




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Old July 24th 05, 09:58 PM
Bob Miller
 
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On Sun, 24 Jul 2005 14:53:08 -0400, "Bob" wrote:

I've got plenty of trees to hang up a dipole for 40 meters and feed it with
ladder line. Power level = 100 Watts.
What's the opinion(s) on the wires contacting leaves, especially near the
end points? Better to use plastic insulated wire rather than enameled wire?


I use insulated wire. And a long-pole tree trimmer to keep the wires
in the clear. Not that hard to clear a path.

bob
k5qwg


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Old July 24th 05, 11:43 PM
Fred W4JLE
 
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I have noted in the past that a KW will causes the leaves to turn brown, the
limb to die removing the offending tree limb via self amputation.

"Bob Miller" wrote in message
...
On Sun, 24 Jul 2005 14:53:08 -0400, "Bob" wrote:

I've got plenty of trees to hang up a dipole for 40 meters and feed it

with
ladder line. Power level = 100 Watts.
What's the opinion(s) on the wires contacting leaves, especially near the
end points? Better to use plastic insulated wire rather than enameled

wire?


I use insulated wire. And a long-pole tree trimmer to keep the wires
in the clear. Not that hard to clear a path.

bob
k5qwg




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Old July 25th 05, 03:07 AM
Bob Miller
 
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On Sun, 24 Jul 2005 18:43:12 -0400, "Fred W4JLE"
wrote:

I have noted in the past that a KW will causes the leaves to turn brown, the
limb to die removing the offending tree limb via self amputation.


Ain't never run no 'gallon' ...

bob
k5qwg



"Bob Miller" wrote in message
.. .
On Sun, 24 Jul 2005 14:53:08 -0400, "Bob" wrote:

I've got plenty of trees to hang up a dipole for 40 meters and feed it

with
ladder line. Power level = 100 Watts.
What's the opinion(s) on the wires contacting leaves, especially near the
end points? Better to use plastic insulated wire rather than enameled

wire?


I use insulated wire. And a long-pole tree trimmer to keep the wires
in the clear. Not that hard to clear a path.

bob
k5qwg






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Old July 24th 05, 11:22 PM
Brian Kelly
 
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Bob wrote:
I've got plenty of trees to hang up a dipole for 40 meters and feed it with
ladder line. Power level = 100 Watts.
What's the opinion(s) on the wires contacting leaves, especially near the
end points? Better to use plastic insulated wire rather than enameled wire?


I've had three HF dipoles strung thru four trees at my remote location
out in the boonies for five years. I use common Home Depot insulated
stranded #14 600V THHN wire. I've never had any problems at all at the
100-150W level with the wire including at the ends which are buried in
the foilage. I do tape the exposed solder joints at the insulators
though. There'a a lot of chatter here and there about trees being
quasi-conductors and catching fire etc. which I write it off as
mythology.

However I have had major problems with the support ropes. The rope is
the 3/16" jacketed UV-resistant Dacron type sold by The Wireman and
others for ~13 cents a foot, It's not Home Depot rope, it's supposedly
the best available for the purpose.

My experience indicates to me that while the wire is OK in all respects
thru trees the ropes have to be replaced every two years. The problem
is that tree branches of all sizes are very abrasive and will simply
eat thru rope if there's any relative motion between the rope and the
branches. Which is unaviodable in windy conditions. As a result I'm
seriously considering replacing the rope with the same wire I use for
the antennas.

w3rv

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Old July 25th 05, 01:50 AM
Hal Rosser
 
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Ropes:== I tried using normal white nylon line (But Painting it black).
the paint makes it stronger and uv-resistant. And lasts longer.

"Brian Kelly" wrote in message
oups.com...
Bob wrote:
I've got plenty of trees to hang up a dipole for 40 meters and feed it

with
ladder line. Power level = 100 Watts.
What's the opinion(s) on the wires contacting leaves, especially near

the
end points? Better to use plastic insulated wire rather than enameled

wire?

I've had three HF dipoles strung thru four trees at my remote location
out in the boonies for five years. I use common Home Depot insulated
stranded #14 600V THHN wire. I've never had any problems at all at the
100-150W level with the wire including at the ends which are buried in
the foilage. I do tape the exposed solder joints at the insulators
though. There'a a lot of chatter here and there about trees being
quasi-conductors and catching fire etc. which I write it off as
mythology.

However I have had major problems with the support ropes. The rope is
the 3/16" jacketed UV-resistant Dacron type sold by The Wireman and
others for ~13 cents a foot, It's not Home Depot rope, it's supposedly
the best available for the purpose.

My experience indicates to me that while the wire is OK in all respects
thru trees the ropes have to be replaced every two years. The problem
is that tree branches of all sizes are very abrasive and will simply
eat thru rope if there's any relative motion between the rope and the
branches. Which is unaviodable in windy conditions. As a result I'm
seriously considering replacing the rope with the same wire I use for
the antennas.

w3rv



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Old July 25th 05, 02:45 AM
Brian Kelly
 
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Hal Rosser wrote:
Ropes:== I tried using normal white nylon line (But Painting it black).
the paint makes it stronger and uv-resistant. And lasts longer.


I have around 500 feet of rope in use at the site and I am *not* gonna
paint 500 feet of rope!

Heh.

w3rv

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Old July 25th 05, 06:02 AM
Hal Rosser
 
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"Brian Kelly" wrote in message
oups.com...


Hal Rosser wrote:
Ropes:== I tried using normal white nylon line (But Painting it black).
the paint makes it stronger and uv-resistant. And lasts longer.


I have around 500 feet of rope in use at the site and I am *not* gonna
paint 500 feet of rope!

Heh.

w3rv


I know what you mean - it would be tough to hang on the rope and keep from
falling and manage the paint bucket and the paint brush all at the same
time. :-)
- but I meant to paint the rope before you put it up. ;-)




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Old July 25th 05, 03:28 AM
Topaz305RK
 
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It is a whole lot easier to buy black "550" (parachute) cord. Braided and
sheathed, it is great. Have had mine up for over 5 years in the open with no
problem. In areas where there was contact with something, i.e., a tower or
tree about 3 years is all I can get.

Sportsman's Guide usually has the stuff every couple of issues.






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