Well, it could still be in the rotor... if there is something wrong with the
pot it could cause those symptoms in the control box also. Measure the
resistance from end to end, it should be 500 ohms. Also measure the
resistance from the wiper to each end as you rotate it, you should get a
smooth transition from 0 to 500 each way. If not, it could be the pot is
bad... or there could be water or another problem with the cable.
David Robbins K1TTT
e-mail: mailto:k1ttt@arrl.net
web: http://www.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
> -----Original Message-----
> From: Paul Price [mailto:k5hsv@yahoo.com]
> Sent: Thursday, June 11, 2009 23:20
> To: <TOWERTALK@contesting.com> <towertalk@contesting.com>
> Cc: Brad Pioveson W9FX
> Subject: Re: [TowerTalk] Yaesu G-2800DXA Not Rotating
>
>
>
> Sent from my iPhone
>
> On Jun 11, 2009, at 2:09 PM, "Paul Price Jr." <k5hsv@yahoo.com> wrote:
>
> Gosh Brad,
>
> You know, I took your advice and had the XYL press the left and right (CCW
> &CW) switch on the control box to rotate the beam. I ran outside with the
> binoculars to watch for hangs, kinks or anything that sounded bad. To my
> amazement and being thankful for prayer answered, the TH-11DX was turning
> at full speed. It made the total rotation range: 450° path before
> stopping. The problem has to be in the control box for sure. I'll pull it
> apart and take a look inside on my next day off. I will say that the
> control box motor is very quiet and may be the issue. I can only hope it's
> the O-ring belt that slipped of or something as simple. I'll keep you and
> others on Tower Talk posted when I get to the bottom of the problem
> completely. Thanks Brad for the advice to look at the control box.
>
>
> Best of 73s,
> Paul - <k5hsv@arrl.net>
>
>
> From: Brad Pioveson W9FX <w9fx@verizon.net>
> To: Paul Price Jr. <k5hsv@yahoo.com>
> Sent: Thursday, June 11, 2009 1:28:33 PM
> Subject: Re: [TowerTalk] Yaesu G-2800DXA Not Rotating
>
> I've seen occasions of water intrusion into the rotor cable connector (at
> the rotor end) cause similar problems, Paul.
>
> It might be worth your time to yank the cable and give the connector a
> good inspection. Corrosion and voltage tracking across cuprous oxide
> paths can be insidious and hard to diagnose from the ground.
>
> One additional thought - are you certain that the indicator in the control
> box is accurately tracking the rotor? In other words, turn the rotor to a
> variety of directions and make sure that the controller and antenna
> directions agree. The control box has that little O-ring 'drive belt'
> that moves the indicator needle - that can be problematic at times.
>
> 73
>
> Brad, W9FX
>
>
> ----- Original Message ----- From: "Paul Price Jr." <k5hsv@yahoo.com>
> To: <towertalk@contesting.com>
> Sent: Thursday, June 11, 2009 1:22 PM
> Subject: [TowerTalk] Yaesu G-2800DXA Not Rotating
>
>
> I just turned on my control box last night and tried to work some stations
> when I noticed when I tried to rotate my beam the control box was very
> slow, in addition, it would only turn in the range of 60-180 degrees. This
> morning, I went outside and disconnected the ICE spike protector and went
> back inside to find out nothing had changed. I climbed the tower to see if
> anything looked kinked or twisted but didn't find anything out of sorts.
> Does anyone have any experience with a similar problem and any ideas as
> what I need to do before I pack this thing up and send it back to Yaesu in
> California? Using my Fluke meter it would be nice to be able to determine
> that it's just a bad cable. However, the fact that the rotor turns slowly
> and only partially makes me think its in the rotor its self... Ideas?
>
> PS: I love the rotor but I'll be darned if I ever buy something that can't
> be worked on by Norms or Rotor Dr. This thing may have to go back to Japan
> since Yaesu doesn't keep parts on hand, from what I've read!
>
> Best of 73s,
> Paul - <k5hsv@arrl.net>
>
>
>
> _______________________________________________
>
>
>
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