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#133963 - 10/13/02 12:09 AM Aerial Rotators  
Trumpy  Offline


Member
Joined: Jul 2002
Posts: 8,217
SI,New Zealand
Could someone please give me some advice on the specifying of Rotators for Heavy duty use.
The Rotator will be asked to turn a 10 metre
5 Element Yagi beam+ a VHF-FM(88-108MHz)5 Yagi, a 2 metre 13 Element beam and a 15 metre Yagi 4 Element beam.
This is for a friend of mine, we are currently designing a tower for the installation.
Can you guys give me some advice on the sizing of the Rotator motor and how many wires are required to run a Rotator of this size.
Also can you suggest a website for Rotators?.

[This message has been edited by Trumpy (edited 10-17-2002).]

[This message has been edited by Trumpy (edited 10-17-2002).]


Let's face it, these days if you're not young, you're old - Red Green grin

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#133964 - 10/17/02 02:15 AM Re: Aerial Rotators  
Trumpy  Offline


Member
Joined: Jul 2002
Posts: 8,217
SI,New Zealand
Can anyone give me some advice?


Let's face it, these days if you're not young, you're old - Red Green grin

#133965 - 10/17/02 04:20 PM Re: Aerial Rotators  
Bjarney  Offline
Moderator
Joined: Apr 2002
Posts: 2,527
West-Southern Inner-Northeast ...
Trumpy — One or two outboard thrust bearings may help.
http://www.universal-radio.com/catalog/hamrot/4230.jpg


#133966 - 10/19/02 11:46 PM Re: Aerial Rotators  
Trumpy  Offline


Member
Joined: Jul 2002
Posts: 8,217
SI,New Zealand
Thanks Bjarney, just wondering what the current draw of this type of equipment is,
and what size wire I should use and how many wires I would need in the multi-core, up to the rotator.


Let's face it, these days if you're not young, you're old - Red Green grin

#133967 - 10/20/02 02:55 PM Re: Aerial Rotators  
pauluk  Offline
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
The number of conductors up to the rotator varies with the design and the type of control. The more sophisticated units have a feedback signal from the rotator head to the controller and often need a couple of extra (smaller gauge) wires.

The main conductors will need to be sized for the motor rating, and the anticipated voltage drop which will depend upon the length of cable. Don't forget to allow for the starting current of the motor, not just running current. That could cause a significant voltage drop on a long run.



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