"zeno" wrote in message ...
How the heck did those TV crews of yesteryear erect 40+ foot
telescoping antenna masts sitting atop pointed roofs? Its not
exactly like you can set up a step ladder on such a roof to
get up the first 10 foot to pull up the rest of the sections.

That's exactly what we did! When you are
young and fearless and believe in your
personal immortality, it's amazing what
you can do ;-)

73, John - K6QQ

That is amazing, like you say.

Now that you mention it, I see no other way to do it. So I guess I will quit my
bellyaching about doing just that out in an open field pulling up 4 ten foot
sections after the first base 10 feet is mounted and guyed.

How did you secure a step ladder on the peak of a roof?

Bill K6TAJ

John Moriarity wrote:

"zeno" wrote in message ...
How the heck did those TV crews of yesteryear erect 40+ foot
telescoping antenna masts sitting atop pointed roofs? Its not
exactly like you can set up a step ladder on such a roof to
get up the first 10 foot to pull up the rest of the sections.

That's exactly what we did! When you are
young and fearless and believe in your
personal immortality, it's amazing what
you can do ;-)

73, John - K6QQ

How did you secure a step ladder on the peak of a roof?

Well, If you're still somewhat chicken,
you can enlist another person to foot
the ladder ;-)

73, John - K6QQ

I installed a Hy-Gain TH-3 Jr and an Alliance TV rotor on a 20 foot TV mast
on a 2 story house -- used a heavy duty antenna tripod for a base-- total
height 42 feet.

The drill was with 5 "Amateurs":
1. Under the roof -- installed 4 by 4's to take lag bolts from the Tripod
base
2. Bolted down the tripod mount to roof and 4x4's -- under the roof added
sealant to prevent water entering.
3. Raised collapsed TV mast with antenna rotor and 4 guy wires --secured in
tripod
4. Guyed the 10 foot section with the 4 guy wires
5. Set step ladder next to 10 foot guyed section -- secured ladder with rope
to mast
6. Stong buddy also held ladder against mast
7. Tall guy (me) ascends ladder. Had rope around my waist in case I nose
dived off of the ladder
8. Horsed the collapsed section with 4 more guy wires attached -- up to 20
feet - secured guy wires (Total 8 guy wires)
9. Fed all hands Pizza and beer.
10. Antenna stayed up there thru storms winds et al for 15 years before I
moved.

Your installation may vary -- this is just the way we did it -- but we were
are not professional installers, so caveat installer. I take no
responsibility for your installation.

You should contact professional TV antenna installers for their approval --
or better yet -- let them install it.


--
deje a lector guardarse

Amateur Radio is the best back-up
communications system in the world,
and that's the way it is. Walter Cronkite





"John Moriarity" wrote in message
...
How did you secure a step ladder on the peak of a roof?

Well, If you're still somewhat chicken,
you can enlist another person to foot
the ladder ;-)

73, John - K6QQ

Hi John,

For a 50' tall mast, what would you say would be the minimum acceptible square
dimensions from vertices (on a flat plane with the base) of the guy wire anchor
points?

Bill K6TAJ

John Moriarity wrote:

"zeno" wrote in message ...
How the heck did those TV crews of yesteryear erect 40+ foot
telescoping antenna masts sitting atop pointed roofs? Its not
exactly like you can set up a step ladder on such a roof to
get up the first 10 foot to pull up the rest of the sections.

That's exactly what we did! When you are
young and fearless and believe in your
personal immortality, it's amazing what
you can do ;-)

73, John - K6QQ

" For a 50' tall mast, what would you say would be the minimum acceptible
square
dimensions from vertices (on a flat plane with the base) of the guy wire
anchor
points?

Since it is easy to design a 100' mast with no guying required, there is
obviously more information required to answer that question.

Jack

Jack Painter wrote:

" For a 50' tall mast, what would you say would be the minimum acceptible
square
dimensions from vertices (on a flat plane with the base) of the guy wire
anchor
points?

Since it is easy to design a 100' mast with no guying required, there is
obviously more information required to answer that question.

Jack

Hi Jack,

That reminds me of that legendary character who was looking for his keys a
thousand feet from where he lost them because the light was better over
there, hi hi.

Bill K6TAJ

For a 50' tall mast, what would you say would be the minimum acceptible
square
dimensions from vertices (on a flat plane with the base) of the guy wire
anchor
points?

I can't answer that authoritatively. Usually
the distance was to the edge of the roof ;-)

73, John - K6QQ

John Moriarity wrote:

For a 50' tall mast, what would you say would be the minimum acceptible
square
dimensions from vertices (on a flat plane with the base) of the guy wire
anchor
points?

I can't answer that authoritatively. Usually
the distance was to the edge of the roof ;-)

73, John - K6QQ

Well, I guess I will just put the guy wires as far out as I can without
bumping into the trees in the orchard.....or I might just not put up this
extra 50' mast at all, but that means I will have to span nearly 180 feet on
one side of my square loop skywire.

I am already falling out of favor with those around me here with this crazy
antenna project....such is the misunderstood life of the ham ....at least I
am in the country and it is my own place....and the waf is not an issue at
the moment. Some people do not find a 50 foot mast in the middle of an
orchard as beautiful as I do. I think the "industrial" aesthetic needs to be
boosted a bit these days....fortuitious pun...perhaps intended....


Bill - K6TAJ

Bill:

You need to enlist a little geometry and mechanical engineering. We like to
keep our top guys at 45 degrees or less (ground up to guy) where space
permits. The down force on the mast for each guy is then .707 of the guy
tension. As the guys get steeper, the down force on the mast becomes a
larger and larger portion of the total tension. So for a smaller
'footprint' with the guys near straight up, any side force on the guy from
wind or antenna tension becomes a larger down force on the mast. I need to
make drawings to clarify that point, so find someone mechanically inclined
to wave their hands and draw lines and make calculations for you.

As far as the stepladder on the roof, consider the average male is just
under 6' tall, with an 18" up reach. So he has to stand only 4 feet above
the mounting level of the base of the mast to erect it. A 5 foot stepladder
straddling the peak of most roofs is relatively stable if you are young,
limber and agile. Having the first (bottom) section SOLIDLY guyed is a
must. At least that's what I remember from the middle of the last century.

--
Crazy George
Remove N O and S P A M imbedded in return address
"zeno" wrote in message ...
Hi John,

For a 50' tall mast, what would you say would be the minimum acceptible
square
dimensions from vertices (on a flat plane with the base) of the guy wire
anchor
points?

Bill K6TAJ

John Moriarity wrote:

"zeno" wrote in message
...
How the heck did those TV crews of yesteryear erect 40+ foot
telescoping antenna masts sitting atop pointed roofs? Its not
exactly like you can set up a step ladder on such a roof to
get up the first 10 foot to pull up the rest of the sections.

That's exactly what we did! When you are
young and fearless and believe in your
personal immortality, it's amazing what
you can do ;-)

73, John - K6QQ