On Feb 11, 2:11*pm, dave wrote:
On 02/11/2011 11:22 AM, bpnjensen wrote:
So, a mechanical question this time -
On a relatively short run of wire of fairly light weight (in this
case, 14 gauge stranded, insulated, and about 60-65 feet horizontal),
what's a good estimated counterweight for the far end? *The wire
itself is light, but the counterweight needs to account for tension as
well. *The support line is over a freewheeling pulley and is currently
tied off, but I think a modest eight would be better in this
circumstance as the near end of the line is a treetop with some sway
in the wind.
So, I ask if anybody has an idea about what a good weight night be to
maintain tension and avoid too much sagging. *For starters, I was
thinking a simple barbell weight of 5 lbs or so more or less, but I'm
wide open on this one.
Thanks so much!
Bruce
Gallon jug of water
Dave that's a good handy and free starting point.
Except if you Live where the Water might Freeze {Oops!}
-and- You may be getting Snow and Ice on your
Antenna Wire and Loading it down down down,,,
Old Plastic Bleach Bottle the Kind with a Handle
built into it. Fill the Bottle with about 3~5~10+
Pounds of Small Rocks {or Gravel}. Place the Cap
back-on the Bottle and and Tie your Antenna
Tension Rope End to the Handle of the Bottle.
* Option Tape the Handle of the Bottle with Duck
Tape to Reinforce it if needed.
* Option Spray Paint the Bottle Green Brown to
blend in with the surroundings if needed.
-service- These Bottles usually last about 3-Years.
-Safety- Use a 5~6 Foot Step Ladder and Position
the Bottle at around7~8 Feet or more above Ground
so that it is not a Head Injury Hazard.
-Rigging- Use a small Pulley to Rig the Tension Rope
End through so that the natural dynamic movement
of the Antenna Wire and the Counter-Weight Bottle
can occur as it happens due to Weather.
http://g8jnj.webs.com/Multi%20antenn...igs%28s%29.gif
BpnJ - Since you live in the SF Bay go to a Fishing
'Bait' Shop and buy a few Salmon / Down Rigger
Weights {3~5 Pound Lead Balls}
http://s.ecrater.com/stores/118075/4...4a_118075n.jpg
http://cdn.sella.co.nz/images/thumb/...0j-640x500.jpg