Re: [TowerTalk] Yaesu 2800 Rotor Indicator Problem

[Tony <dxdx@optonline.net>]

All:

Following the guidelines below (thanks Chuck) I found that the 
resistance between pins 1 and 2 and pins 2 and 3 change very little when 
spinning the rotor stop-to-stop. The other values are fine.
Looks like the potentiometer failed.

Tony -K2MO



On 3/29/2019 6:39 PM, Chuck Dietz wrote:
> This came up on the first page of a Google search:
>
> Resistances between the pins of the rotator socket should be as follows:
>     Pin 1 to pin 2: 0 to 500 ohms
>     Pin 1 to pin 3: 500 ohms
>     Pin 2 to pin 3: 500 to 0 ohms
>     Pin 4 to pin 5: 6 ohms with the rotator in mid-range, 18 ohms
> (polarized) with the rotator at either end of rotation.
>
> At the controller socket, approximately 6 VDC should be present between pin
> 1(+) and pin 3.  Also, 8 to 24 VDC should be present between pins 4 and 5,
> with the actual voltage depending on the Speed control setting, and the
> polarity determined by the Right and Left switches.  If the Preset mode is
> active, voltage between pins 4 and 5 will vary.
>
> Note that the resistance checks at pins 1, 2, and 3 must be made with the
> controller disconnected.  No, I don't know what (polarized) ohms are...
>
>
> Chuck W5PR
>
>
> On Fri, Mar 29, 2019 at 5:25 PM Tony <dxdx@optonline.net> wrote:
>
> > All:
> >
> > The indicator on my Yaesu 2800 rotor has stopped working. I put a Yaesu
> > 1000 control box in line and the same thing happens. I have an Array
> > Solutions lightning protector in line and was told it could be an MOV /
> > CAP that's gone bad on the indicator control line.
> >
> > If that's not the problem, I'm going to need to test the rotor pots via
> > the cable and was wondering if anyone can pass along the proper procedure.
> >
> > Thanks,
> >
> > Tony
> >
> >
> >
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