Wobbly Pole

Hello.

I have a 1.25 inch aluminium pole, around 18’ in length on top of which I have
various aerials and wires…like you do.

When I bought the aluminium mast, I made a mistake and purchased one that was not as strong as I had expected.

But as I now do not have my Transit van with a roof rack any more, I cannot go and buy another one easily.

I also do not fancy shorter poles joined together.

So, how can I stiffen it up, as it blows around on a normal day - let alone in all this wind.

Would filling it with sand help?

Any suggestions are greatly received.

John
G1STQ

Buy a stronger one difficultly! i.e. buy a 2in pole and pay for delivery. You may find a local scoffolder has some tired poles they want rid off.

Its good you pole can move a little.
When they design sky scrapers, they can move as much as a metre in the winds. With last nights winds my 2"" poles are moving a round a little but to me that,s a little give putting less stress on it but can pull on your antenna a bit especially if its a tuned length unlike me G5 is no worries unless it snaps. But mines not set tight for that reason it does get pretty wind up here on a hill and did last night

You could Guy rope off your pole is another idea.

But yes chat to your local scaffy people and ask them to deliverer when inpassing. Must have chat with mine as I need some spinning clamps.

Karl

You could stiffen it up a bit by pouring concrete into it, a mortar mix with some plasticiser.

Brian

Yes, I agree with Karl, a bit of swaying is quite healthy - that’s how trees cope with high wind :o)

If you do add guys, either put them above the middle, or below it. If you guy it in the middle, it will resonate in high wind, and likely snap - think suspension bridge disasters!
(Middle, in this context, should include the effect of whatever aerials are fixed to the top. Having fitted the guys, give the pole a slow shake, and check that it quickly stops when you let go. If it keeps whipping back and forth, change the guying point).

I have a 20 foot 2 inch thin walled aluminium pole supporting a white stick co-linear, and the mid point of a doublet. It is fixed at the base, and at a point about six feet up. It started out some years ago as a temporary arrangement, but has held up well so far.

Adrian
G4AZS

1 Like

Interesting that bit of information :hushed:

Will remember than when I guy off me support pole with the beam on it. :smiley:

So on my 20ft pole wants to be about 12ft to 14ft. No Lower. Or the total height including the beam above half way as the Hex adds about another 4ft Now thinking about it, so 16 to 18ft would be better yes. :confused:

Again thanks for that info most useful. :smile:

Karl

Not thought about a cement mix.

:slight_smile: