Tower stand offs for 160 Meter Inv-L
 

I am planning to put up an inverted-L along side my tower per the
drawing at

http://www.bloomington.in.us/~wh2t/invertedl.html

I would appreciate some suggestions for 12 and 30 inches stand offs
to support the 12g insulated wire I plan to use. Also the wire needs to
be secured at the top before it bends over. Any suggestions to keep it
from slipping at that point will be appreciated.

I plan to ball part the length at 130 feet and see what happens.

Dick, AA5VU
call at ARRL.net

"Dick, AA5VU" wrote
I am planning to put up an inverted-L along side my tower per the
drawing at

http://www.bloomington.in.us/~wh2t/invertedl.html

I would appreciate some suggestions for 12 and 30 inches stand offs
to support the 12g insulated wire I plan to use. Also the wire needs to
be secured at the top before it bends over. Any suggestions to keep it
from slipping at that point will be appreciated.

I plan to ball part the length at 130 feet and see what happens.

Dick, AA5VU
call at ARRL.net

Hi Dick, hope you get some good ideas for stand-offs - I'm building the same
thing, but using a 90' tall loblolly pine branch, no stand-offs required ;-)
I will use standing rigging and a nylon block (prob 4") to make the turn at
the top (limb) as this minimizes overtensioning due to wind action between
my pine-towers. And, I can always hoist a Balun up later , as below.

I have wondered what the performance difference would be between this
Inverted-L (easy to erect) and the sloper or folded dipole, top-fed with a
4:1 Balun, but not as easy to fly. My 1/4~ will only be 107' so it's an
easy job for the Inv-L...maybe I'll try the alternative if I'm not happy
with it. But it it's not broke.....G

Jack
Virginia Beach

I used PVC improvised standoffs for my shunt fed tower.

In article ,
(K9SQG) wrote:

I used PVC improvised standoffs for my shunt fed tower.

I just got down from the scary-as-hell trip up the tower. The wind was
really blowing up on top. I stripped the old stuff and will have to go
back once I figure out what is need. The 3 foot (~2 foot past the tower)
wooden stand off I used last time was pretty wx-worn. I don't think PVC
is strong enough and the sun eats the the PVC stuff up. May have to use
a good hard wood again. It will probably out last me. Still not sure how
to secure the Inverted-L antenna wire to the stand off on top. It needs
to be tied off so it will not slip at the bend.

I am getting too old to climb a 22+ year old tower. Everything looked
okay...I just wanted to get down.

I've used old broken hockey stick handles for standoffs. They will last
for years and are are very strong. The handle never breaks, it's always the
part at the bottom.

Irv VE6BP
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Calgary, Alberta, Canada

Hi Guys:

Try the gray plastic conduit use in electrical wiring. It's no stronger than
plumbing PVC pipe but it stands up to the weather better and its cheaper
than plumbing pipe around here.



--
John Passaneau, W3JXP
Penn State University



"Dick, AA5VU" wrote in message
...
In article ,
(K9SQG) wrote:

I used PVC improvised standoffs for my shunt fed tower.

I just got down from the scary-as-hell trip up the tower. The wind was
really blowing up on top. I stripped the old stuff and will have to go
back once I figure out what is need. The 3 foot (~2 foot past the tower)
wooden stand off I used last time was pretty wx-worn. I don't think PVC
is strong enough and the sun eats the the PVC stuff up. May have to use
a good hard wood again. It will probably out last me. Still not sure how
to secure the Inverted-L antenna wire to the stand off on top. It needs
to be tied off so it will not slip at the bend.

I am getting too old to climb a 22+ year old tower. Everything looked
okay...I just wanted to get down.

In article
,
"Dick, AA5VU" wrote:

I am planning to put up an inverted-L along side my tower per the
drawing at

http://www.bloomington.in.us/~wh2t/invertedl.html

I would appreciate some suggestions for 12 and 30 inches stand offs
to support the 12g insulated wire I plan to use. Also the wire needs to
be secured at the top before it bends over. Any suggestions to keep it
from slipping at that point will be appreciated.

I plan to ball part the length at 130 feet and see what happens.

Dick, AA5VU
call at ARRL.net

I just got back from Home Depot and the sell some treated (nasty
smelling) 2 x 2 deck post that are 3 feet long for $.99 each. I will be
using one at the top and one at the bottom to keep the antenna wire away
from the tower. I stripped the old stuff off the tower this week and
hope to have the 160 meter Inverted-L for RTTY up in a week or so. I am
getting too old for this tower climbing stuff. HiHi

Thanks for the excellent suggestions.

That treated lumber is not a long term solution by any means. To extend its
life, ensure it is stained and sealed yearly or every other year.

On Sun, 29 Aug 2004 12:19:37 GMT, Dick, AA5VU hath writ:

I just got back from Home Depot and the sell some treated (nasty
smelling) 2 x 2 deck post that are 3 feet long for $.99 each. I will be
using one at the top and one at the bottom to keep the antenna wire away
from the tower. I stripped the old stuff off the tower this week and
hope to have the 160 meter Inverted-L for RTTY up in a week or so. I am
getting too old for this tower climbing stuff. HiHi

I certainly hope you can personally select the posts you buy.
You, of course, don't wany any with knots in them!
And, _that_ may be why they are $.99 each. HI!HI!

In a similar thread, I suggested the use of fiberglass replacement
tool handles. Something like a grass rake handle should Fit The Bill.

That's what I use for a stand-off (stand-away?) for the mid-point of my
75M/40M Inverted Vee's. I painted it "Rohn Grey" before installing it.

I was Very Lucky: When I went to the local ACE H/W Store, they _gave_
me a cut-off for free. Seems they got a shipment of Very Defective
shovels, and headquarters told them not to send them back -- but,
rather, to cut the handles off the shovels (which were the defective
component -- they split [!!] down the center under heavy, but reasonable
use) and to toss'em in the dumpster. Well, the folks at the ACE here
are about as commited a set of scroungers as I am. They threw out
the shovels and stored the handles in a large barrel in the back lot.

73 es gl
Jonesy
--
| Marvin L Jones | jonz | W3DHJ | linux
| Gunnison, Colorado | @ | Jonesy | OS/2 __
| 7,703' -- 2,345m | config.com | DM68mn SK

In article ,
Allodoxaphobia wrote:

n a similar thread, I suggested the use of fiberglass replacement
tool handles. Something like a grass rake handle should Fit The Bill.

I went to Home Depot and they did not have what you described. The had
some crappy extension poles. The wood I picked is pretty good and should
work out okay.