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[TowerTalk] Ham IV rotor

To: TowerTalk Reflector <>
Subject: [TowerTalk] Ham IV rotor
From: Tom Anderson <>
Date: Mon, 30 Aug 2004 11:10:41 -0500
List-post: <>

Fellow Tower Talkians:

I've got a Ham IV (1987 vintage that has been overhauled three years ago by Norm's Rotor Service). But I still seem to have problems with it such as wild meter swings, etc.

A few months ago I completely replaced the rotor cable with one that has

2 16 ga and six 18 gage wires in about a 75 foot total run. Now it seems to be on the fritz again. Can't get any readings from the rotor itself at the control box, per using the Telrex/Hygain manual. SHould I step up to a higher gauge wire, which would probably be overkill at such as short distance of 75 ft. total. The cable is attached to my Tri-Ex 50 foot crankup by 3 standoffs bought with the tower.

The connectors on both ends are 8 plug trailer disconnects from Wireman and are each wrapped first in heat shrink tubing, then Scotchcoted, then wrapped in Scotch 33 tape and Scotchcoated again, and finally in a piece of sticky butyl rubber made for weatherproofing large outdoor connectors, and this is Scotchcoated again. I don't think moisture is the problem, just can't seem to isolate what is the problem though.

The system is wired so I can take the rotor control box direct to the rotor and plug it into the rotor pigtail I ran from the 8 screw terminal board to the trailer disconnect.

May have to pull the whole thing down and start over as far as cabling is concerned, However, I will crank the tower down and take the rotor box to the rotor and connect them directly to see if the problem is somewhere in the 75 foot run of rotor cable.

Any suggestions gladly accepted.

Tom, WW5L


See: for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA.

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