Home |
Search |
Today's Posts |
|
#1
![]() |
|||
|
|||
![]()
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? |
#2
![]() |
|||
|
|||
![]()
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? |
#3
![]() |
|||
|
|||
![]()
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 |
#4
![]() |
|||
|
|||
![]()
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 |
#5
![]() |
|||
|
|||
![]()
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 |
#6
![]() |
|||
|
|||
![]()
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 |
#7
![]() |
|||
|
|||
![]()
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 |
#8
![]() |
|||
|
|||
![]() 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 |
#9
![]() |
|||
|
|||
![]() "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. ;-) |
#10
![]() |
|||
|
|||
![]() 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. |
Reply |
|
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Forum | |||
Inverted ground plane antenna: compared with normal GP and low dipole. | Antenna | |||
dipole question | Antenna | |||
How to measure soil constants at HF | Antenna | |||
Dipole vs. Delta loop vs. Quad loop -pratical experience | Antenna | |||
suggestions for a limited space HF antenna.. vertical or dipole | Antenna |