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[TowerTalk] Re: [Antennas] Homebrew Rotators

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Subject: [TowerTalk] Re: [Antennas] Homebrew Rotators
From: (Tim Makins, EI8IC)
Date: Mon, 29 Oct 2001 00:17:11 -0000
Yes this is a good idea. Its not as if you need to know your position to the
nearest degree, considering the beamwidth. People used to make these with
clear film and a black pen, but a printer will give a much better result.
You could also put a number of rings on the film with different codes on
them so for instance you could directly adapt to a 7-segment display using
BCD etc.

Another direction indicator system is to use a cheap black and white camera
pointing at a strip of paper stuck round the rim of the rotator, and watch
the result on a monitor in the shack, but make sure the camera does not move
or you might get a view of the neighbour's bedroom.

Of course, if you really want to get basic, use a 10 turn pot and some


----- Original Message -----
From: "k9wkj" <>
To: "Glenn Millar" <>
Cc: <>; <>
Sent: 28 October 2001 23:12
Subject: Re: [Antennas] Homebrew Rotators

> Glenn Millar wrote:
> > Working on a project here to make a homebuilt rotator.  While the
> > of the system are fairly straight forward one problem is with the
> > indication.  I was considering using an old commerial rotator if I could
> > find one, but also was wandering about the direction indication system
in a
> > wind monitor of a weather station.  However I was wandering does anyone
> > the list know of or could suggest any alternatives, using products that
> > easier to find or less expensive.
> >
> > Many thanks
> >
> > Glenn
> >
> >
> >
> > ------
> > Submissions:
> ive been thinking about that myself
> i think im going to make a optical encoder disk
> with transparecy film on my ink jet printer
> and a led a photocell and a comparetor chip
> that will give me a high low signal and all you have to do is count them
> and you will know where you are
> lots of details but it should work
> cul de k9wkj
> ------
> Submissions:

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