keeping wire antennas up
 

John Smith wrote:
Dave Heil wrote:

...
Dave K8MN

OK. Sorry. I see the fender mentioned washer mentioned in one of your
previous posts. That is bound to happen, I only scan 1 out of 4-10 of
your posts--and have my news reader set to mark your new posts as
already having been read, easy to miss 'em. LOL

So you issued your statement based upon a post you didn't read?

Dave K8MN

keeping wire antennas up
 

Dave Heil wrote:

...
So you issued your statement based upon a post you didn't read?

Dave K8MN

Wow, what a rash statement!

There are millions, perhaps billions of books in the world. I have not
seen a man yet speak who has read them all--it is just impossible--as
are your posts ... :-D

JS

keeping wire antennas up
 

John Smith wrote:
Dave Heil wrote:

...
So you issued your statement based upon a post you didn't read?

Dave K8MN

Wow, what a rash statement!

There are millions, perhaps billions of books in the world. I have not
seen a man yet speak who has read them all--it is just impossible--as
are your posts ... :-D

Yet you found time to snipe at something you hadn't read. You must be
feeling pretty foolish, "John".

Dave K8MN

keeping wire antennas up
 

Dave Heil wrote:

...
Yet you found time to snipe at something you hadn't read. You must be
feeling pretty foolish, "John".

Dave K8MN

Hey, God made me that way--some are fortunate to be able to blame the
apes! ROFLOL

Regards,
JS

keeping wire antennas up
 

Dave Heil wrote in
:

Michael Coslo wrote:
Dave Heil wrote:

inch long eye bolt, add a nut and stick it in the concrete. A
pencil through the eye will hold it in position until the concrete
cures.

Arrrrgh! That'a a little extreme, donchya think Dave?


hehe.

I don't care to imagine concrete blocks dangling in space or screen
door closers affixed to trees, Mike.


Just a joke Dave. Read the "A pencil through the eye will hold it
in position until the concrete cures" out of it's proper context.

Hey, I didn't say it was all that good of a joke.... ;^)


- 73 de Mike N3LI -

keeping wire antennas up
 

Mike Coslo wrote:
Dave Heil wrote in
:

Michael Coslo wrote:
Dave Heil wrote:

inch long eye bolt, add a nut and stick it in the concrete. A
pencil through the eye will hold it in position until the concrete
cures.
Arrrrgh! That'a a little extreme, donchya think Dave?


hehe.
I don't care to imagine concrete blocks dangling in space or screen
door closers affixed to trees, Mike.


Just a joke Dave. Read the "A pencil through the eye will hold it
in position until the concrete cures" out of it's proper context.

Hey, I didn't say it was all that good of a joke.... ;^)

I didn't notice it at first reading, Mike. It isn't all that bad a joke.

I'm just glad you didn't latch on to "fender washer".

Dave K8MN

keeping wire antennas up
 

"Bob" wrote in message
-Free...

"Brian Kelly" wrote in message
...
On Jan 18, 3:36 pm, "Juan M." wrote:
A problem seeking a solution.

I live in a wooded area of the Pacific Northwest with dozens of fir
trees of
100 ft or more in height that make wonderful supports for high dipoles
and
other wire antennas. These particular trees have very few limbs at
anything
below the 60 ft level so using a crossbow or slingshot for installation
is
not practical. I have been forced to employ a professional tree climber
to
install the eyebolts and halyards. Using this system, the antennas can
be
raised and lowered for maintenance or modification.

This system works fine until our winter storms kick in. Often, during
those
storms, a tree will lose a limb or two and take the antenna down with
it. I
am then left with a halyard tied to an insulator 50 ft or more above the
ground with no way to get the insulator back down short of hiring
another
costly climber.

Does anyone have any solutions to this problem?

Install continuous loops through all your pulleys rather than
"halyards". Hauling one side of the loop hoists the insulator and
hauling the other side of the loop brings it back down to where you
can work on it. Regardless of the condition or fates of wires
suspended between pulleys.

An aside you might check out: Really nice pulleys:

http://www.harkenstore.com/uniface.urd/SCCYSPW1

w3rv

Juan you see, they luring you to buy expensive stuff, don't buy! be
smart! Art is right! same gang ..
I have used the pulleys in previous installs, but the eyebolts go into the
trees nicely and they don't jam or freeze up.

Thanks for the ideas.

keeping wire antennas up
 

On Fri, 18 Jan 2008 12:36:01 -0800, "Juan M."
wrote:

A problem seeking a solution.


John,

Come on down South!

Greenville, SC is a lovely place!

Fred
W4FCM


I live in a wooded area of the Pacific Northwest with dozens of fir trees of
100 ft or more in height that make wonderful supports for high dipoles and
other wire antennas. These particular trees have very few limbs at anything
below the 60 ft level so using a crossbow or slingshot for installation is
not practical. I have been forced to employ a professional tree climber to
install the eyebolts and halyards. Using this system, the antennas can be
raised and lowered for maintenance or modification.

This system works fine until our winter storms kick in. Often, during those
storms, a tree will lose a limb or two and take the antenna down with it. I
am then left with a halyard tied to an insulator 50 ft or more above the
ground with no way to get the insulator back down short of hiring another
costly climber.

Does anyone have any solutions to this problem?



73,

John

AE7P

keeping wire antennas up
 

On Fri, 18 Jan 2008 12:36:01 -0800, "Juan M."
wrote:

A problem seeking a solution.


I live in a wooded area of the Pacific Northwest with dozens of fir trees of
100 ft or more in height that make wonderful supports for high dipoles and
other wire antennas. These particular trees have very few limbs at anything
below the 60 ft level so using a crossbow or slingshot for installation is
not practical. I have been forced to employ a professional tree climber to
install the eyebolts and halyards. Using this system, the antennas can be
raised and lowered for maintenance or modification.

This system works fine until our winter storms kick in. Often, during those
storms, a tree will lose a limb or two and take the antenna down with it. I
am then left with a halyard tied to an insulator 50 ft or more above the
ground with no way to get the insulator back down short of hiring another
costly climber.

Does anyone have any solutions to this problem?



73,

John

AE7P

I can't speak for your specific situation, but here is how I handled
the similar situation.

I used either a multi-band-parallel dipole (sometimes referred to as a
fan dipole) or a 135 foot dipole fed with 300 ohm twin-lead. These
antennas were raised about 100 feet or so into trees by mason's line
which can be purchased at Walmart or most hardware or building supply
stores.

My first antenna was taken down by tree movement shortly after having
put it up. After that, I created a 'fuse' mechanism that released the
line if too much tension was placed on the antenna end.

What I did was to pull the antenna up partially until the antenna was
just above the ground. I wrapped the excess line around two nails I
used as a make-shift cleat. Then I wrapped the string around a nail
and mounted it into the bark of the tree. I did this several times a
different intervals until the antenna was raised to a maximum height
still providing for general tree movement in the wind. When an excess
wind strikes, it removes one or more of the nails lowering the antenna
without breaking the string, or if a limb hit the wire, the antenna
was low enough for me to reach the end of the line and put it back up.

disclaimer:

I didn't really trust the mason line to work as well as it did. I
typically replaced it every six months or so (as I replaced antennas
this often, mostly in experimentation or for improvements.)

While I still use it today, I don't recommend it for anyone wanting to
put up a permanent antenna and just leave it alone for more than a
year.

Buck

--
73 for now
Buck, N4PGW

www.lumpuckeroo.com

"Small - broadband - efficient: pick any two."

keeping wire antennas up
 

Buck wrote:

I can't speak for your specific situation, but here is how I handled
the similar situation.

I used either a multi-band-parallel dipole (sometimes referred to as a
fan dipole) or a 135 foot dipole fed with 300 ohm twin-lead. These
antennas were raised about 100 feet or so into trees by mason's line
which can be purchased at Walmart or most hardware or building supply
stores.

. . .

While I still use it today, I don't recommend it for anyone wanting to
put up a permanent antenna and just leave it alone for more than a
year.

I don't think it works equally well for all kinds of trees. For many
years I've used nylon twine or mason's line for raising Field Day
antennas. The trees here in the Pacific Northwest are of course mostly
evergreens which have a lot of pitchy sap and in many varieties, fairly
soft wood. An antenna with a fair amount of tension causes the line to
dig into the wood in a very short period of time. And even after two
days, the line can sometimes be hard to get down because of being seized
in the pitchy slot it cuts in the wood. So while it's fine for a very
short time temporary setup, I don't consider it viable for longer term
installation in the kinds of trees we have here.

Roy Lewallen, W7EL