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[TowerTalk] Rotator Voltages and Other Issues

To: towertalk@contesting.com
Subject: [TowerTalk] Rotator Voltages and Other Issues
From: Don <w7wll@arrl.net>
Reply-to: w7wll@arrl.net
Date: Tue, 18 Dec 2018 20:13:53 -0800
List-post: <mailto:towertalk@contesting.com>
Like most hams using rotators in the past and present, I just ran old standard rotor cable from places like HRO or other ham outlets  from the standard control box to the rotator. Didn't think much  about it. Worked and it seemed problems, if any, were issues other than turning the little buggers.

Looking at all the discussion about rotators on this site, particularly the varying and often dissimilar conclusions about their problems, (take a breath) and with the influx of a lot of new rotors over the last couple of decades, I wondered if anyone had put together a chart that detailed, for each rotor, from the lowly CD-44 to the new biggies which I've never even seen, the operating voltages they best operate, their upper and lower V limits, current draw (and related to the rotor cable available at most ham sales sites), what the proper wire size should be used for each over length? For example, I use T2X's because I have them. But the rotor cables I purchased 40 years ago I notice have different wire sizes than the last length I purchased recently (hell of a lot stiffer too, a problem to consider for crankups when the looping arrangement is selected vs just dropping the cable on the ground).

I know there is no guiding info in the HyGain manuals, old or new, about the latter.

My question is further piqued by a friend back east who felt his rotor (not a T2X)  was 'slow' so ramped the voltage up. Rotator failed shortly after. Don't know where he went with V and whether the wire sizes were adequate for the current draw.

A comprehensive rotor chart with little details not given out by the manufacturers but learned by the users would be a great help I'd think to new hams and even those with some experience with a few but not all rotators.

Maybe it already exists?

don W7WLL

O

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