[TowerTalk] Yaesu 2800 Rotor Indicator Problem

Chuck Dietz w5prchuck at gmail.com
Fri Mar 29 18:39:12 EDT 2019


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 at 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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