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Re: [TowerTalk] Ham IV Stuck

To: "reflector Towertalk" <>
Subject: Re: [TowerTalk] Ham IV Stuck
From: "Dave Hachadorian" <>
Reply-to: Dave Hachadorian <>
Date: Mon, 23 Dec 2019 21:54:44 -0700
List-post: <>
On the control unit,  jumper terminals 5-8 to bypass the limit switch.

Dave Hachadorian, K6LL
Yuma, AZ

-----Original Message----- From: Kim Elmore
Sent: Monday, December 23, 2019 5:41 PM
Subject: Re: [TowerTalk] Ham IV Stuck

It sounds like the CW limit switch is stuck open. You can wire around
the limit switch at the control head as a test (see the manual for which
wires go to the limit switch and simply jumper across them.

Kim N5OP

On 12/23/2019 5:54 PM, Ron 'KF5JRA' Rosson via TowerTalk wrote:
First of all “Merry Christmas & Happy New Year”

After a ton of googling I thought I would expand my issue to a stronger brain trust than Google.

I have a ham IV nestled in a Glen Martin Roof top tower with a 6’ mast and a K4KIO hexbeam (picture can be found here ( When I installed it I set it up so that my offsets CW/CCW are set at 180 and true north should be my zero in the middle of the ham IV rotation.

Somehow I have gotten the rotor stuck/wedged at the CW 180 stop and no matter what I do it aint moving. I can hear the brake solenoid disengage/engage when I attempt to move int but get no movement. With my installation be a little over three and half years old’ could something have failed already? All meter readings are within specs so cable is good. Is it that with the cold weather ( I live in Loveland, CO (7 miles south of Fort Collins & 55 miles north of Denver)) that I should just wait till I get a decent warm spell and part that this is just a frozen due to the cold.

Any ideas or assistance is much appreciated.

73 de KF5JRA
kf5jra at oneinsane dot org


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Kim Elmore, Ph.D. (Adj. Assoc. Prof., OU School of Meteorology, CCM, PP
SEL/MEL/Glider, N5OP, 2nd Class Radiotelegraph, GROL)

/"In theory there is no difference between theory and practice. But, in
practice, there is." //– Attributed to many people; it’s so true that it
doesn’t matter who said it./


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