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Rotor leads (comments)

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Subject: Rotor leads (comments)
From: (Chuck Dietz)
Date: Tue, 10 Dec 1996 20:35:51 -0800 wrote:
> > I have a tower located 200' from the radio shack, the tower is 125'
> > tall.  My plans are to run the leads in conduit below ground and am
> > wondering how well the rotor (TailTwister) will perform.  By the time I
> > get through running the lead for the rotor it will be approx. 350'.
> > The lead I have is 2/12 gage and 6/14 gage.  I'm hoping the voltage drop
> > won't be that much but am not sure.  Any suggestions?
> -------------------------------------------------------------------------------
> Guys, I have clipped the id from the above. But as for suggestions????
> 1. Has anyone ever heard of Ohms Law?
> 2. The motor resistance of the Tail Twister is given in the manual.
> 3. The ARRL handbook and almost any antenna book will give the resistance per 
> 1000 feet
>    of just about any wire size.( in this case ( 350' ) multiply it by .35
> 4. The voltage at the control box is known.
> Instead of "hoping" it will work, why not do your homework, and determine if 
> it will work or
> not. This way, you KNOW what you are doing. You may also discover you have a 
> marginal
> operation.
> And by the way, if you  bury that cable in conduit, I will gurantee you'll 
> blow the rotor
> motor,directional pot, control box, and the cable the first time you get a 
> near proximity
> lightning strike. Unfortunately, I learned that one the hard way.

I have concreted in 3 tower bases and am getting ready to stack tower 
soon.  I had planned to bury rotor cable and hard line in conduit...

Question #1:  I understand ohm's law, but what about that will tell me 
how low a voltage the rotor will operate under?

Question #2: What is there about burying the cables in conduit that makes 
it suseptable to lightning?  Can I use PVC and be OK?


Chuck, KE5FI

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