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Tilting Antenna for Better Reception

49920 Views 63 Replies 30 Participants Last post by  distox
Will angling an antenna upward improve reception?:confused:
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My main UHF rig is on a manual tilt mount, and I have it leaning back somewhere around 5-9 degrees, which gave the best signal when I originally lined it up for analog UHF-18 -- a very deep/far fringe signal. Here, at least, the tilt made a noticeable difference.

Now that UHF-18 is off-the-air for good, I should really recalibrate the tilt for its digital replacement channel on UHF-23.

On the workbench, is a small clockwork-style geared motor assembly, about the size of a person's hand. I plan to use it as the basis for a simple shop-built tilt motor for remote control/adjustment. Someday.

as a practical matter, I wonder how many people actually tilt, I imagine its more fringe areas, also doesnt that become a strain if a rotator is involved...
Tilting about the centre of gravity shouldn't affect the rotor at all.
That's how the (home built) manual tilt on our big array here does it.
mlord, did you post any pics of your home-built tilter, thanks
Mmm.. I think the only possibly okay photo I have of it is this one:

[deleted -- better image below now]

The mast from the rotor extends straight up to the mid point of the antenna. The antenna is on a separate mast, hinged at the midpoint where it attaches to the mast from the rotor.

The tilt gets manually adjusted by removing a bolt from the bottom adjustment rail, repositioning it, and reinserting the bolt again.

I have parts and plans to motorize it, but that hasn't happened yet.

The blob behind the antenna is a scrap of eavestrough downspout, acting as a weatherproof housing for the preamp and 2:1 combiner.

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The "hinge" is just a couple of T-brackets: bolted to the antenna mast (left), and attached to the tower/rotor mast (right) via a single bolt/nut, so it can pivot freely (yet securely).
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And to answer the obvious unasked question: Yes, it is absolutely rigid, with zero flex even when subjected to very high winds.

Both the antenna mast, and the tower/rotor mast, are from a chopped up section of chainlink fence toprail from H.D.

I could have used aluminium for the antenna mast portion (less weight), but didn't. :)

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