[Boatanchors] Rotor problem

[K0DAN]

Agreed on all...I have the G800SDX, pretty much same thing except for motor 
size.

The Yaesu service guys are pretty nice and will help you troublshoot over 
telephone.  Try getting a hold of Ron 714-827-7600).

I looked thru my notes from when I had this trouble and Yaesu advised it's 
either a bad pot in the rotor unit or the port/gear-set in the controller.

Says to test the pot in the rotor: Pins 1,2,3 (pin 2 is wiper), combinations 
should total 500 ohms.

There's a 500 ohm pot in the controller too...can substitute if you suspect 
bad. Good place to squirt Deoxit first.

Another possibility is defective cable atop tower (flex loop)...causes 
erratic/intermittent problems.

If you can beg/borrow another control box, you can isolate if the trouble is 
in the shack or at the top of the tower (this is another corrolary of 
Murphy's Law).

I love the user features of the Yaesu rotors, but they are ugly to service 
and are not build like the old CDR rotors!


----- Original Message ----- 
From: "Glen Zook" <gzook at yahoo.com>
To: "K0DAN" <k0dan at comcast.net>
Cc: <boatanchors at mailman.qth.net>
Sent: Friday, May 04, 2007 11:03 PM
Subject: Re: [Boatanchors] Rotor problem


> The Yaesu G-1000SDX is unusual in the fact that the
> rotor goes 450 degrees instead of the "normal" 360
> degrees.  It has a 90 degree "overlap" at one end so
> you don't have to reverse just to go a few degrees
> past the "normal" stop.
>
> The indicator is a "sorta" selsyn that mechanically
> rotates the pointer.  However, the control circuitry
> is solid-state in nature rather than mechanical.
>
> If I have to troubleshoot the control box I can.
> However, it would be much easier if someone has run
> into this problem before and can indicate just what is
> happening.
>
> I have rebuilt a HAM-M and a HAM-II several time over
> the years including things like the rheostat.  My old
> CDE AR-22 which I got used about 45 years ago is still
> going strong on my "short tower" turning VHF yagis.  I
> have replaced the starting capacitor in the control
> box like 6 or 7 times over the years and lubricated
> the motor assembly a couple of times.  But that rotor
> is like a Timex watch, it "takes a licking and keeps
> on ticking".
>
> Glen, K9STH
>
>
> --- K0DAN <k0dan at comcast.net> wrote:
>
> This could be a sign of the rheostat ring on the rotor
> going bad (not a good thing). But could also be a
> symptom of its mate inside the control box also having
> ailments (corrosion, dirt, etc.). I'm not an expert on
> the Yaesu rotors but have had my share of problems.
>
>
>
>
>
>
>
>
>
> Glen, K9STH
>
> Website:  http://k9sth.com
>
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