[TowerTalk] TowerTalk Digest, Repairing Yaesu G-800SA

[Perry - K4PWO]

I'm thinking of getting one as well
The manual is on the Yaesu Web site and it has a controller schematic in the 
back (I can e-mail the PDF file if you don't find it).  Pretty straight 
forward circuit.  You have a DC power supply that produces a regulated 12 
volts for the electronics, and un-regulated 24 volts for the rotor.  The 
electronics mainly read the feedback pot's voltage in the rotor to drive the 
display compass rose motor and it's mechanically coupled feedback pot to the 
same voltage.  The equivalent of a "selsyn" system.  The rotation direction 
switches just cause the relays to close reversing the polarity of voltage to 
the motor depending on the direction of rotation.  You have an internal 3 
amp. fuse in the 24 volt supply as well as the AC line fuse on the back of 
the controller.

73 de Perry - K4PWO

--------------------------------------------------
From: "Terrence R. Redding Ph.D." <terry at oltraining.com>
Sent: Monday, January 18, 2010 14:27 PM
To: <towertalk at contesting.com>
Subject: Re: [TowerTalk] TowerTalk Digest, Repairing Yaesu G-800SA

> Perry, thank you for your help.
>
> I am going to get the RC1-Y-Digital-Rotor-Control, unless someone here has
> had a bad experience with them.
>
> It appears my controller is bad.  If someone has the voltage chart for the
> Yaesu controller maybe I can repair it.
>
> Terry - W6LMJ
>
>
> On 1/17/10 5:32 PM, "towertalk-request at contesting.com"
> <towertalk-request at contesting.com> wrote:
>
>> Message: 6
>> Date: Sun, 17 Jan 2010 16:30:57 -0600
>> From: "Perry - K4PWO" <k4pwo at comcast.net>
>> Subject: Re: [TowerTalk] Repairing Yaesu G-800SA
>> To: "Tower and HF antenna construction topics."
>> <towertalk at contesting.com>
>> Message-ID: <487DEB27194B4419815379CAD2252804 at Developement>
>> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
>> reply-type=original
>>
>> You can use a 12-volt battery to apply power to the rotor motor to see if 
>> it
>> moves.  The polarity controls direction so make sure the rotor isn't 
>> against
>> a stop.  I've used a rechargeable drill's power pack as a test power 
>> source
>> before.  A "jump starter" pack will also work.  Here are two possible
>> solutions if the rotor controller is defective.
>> http://www.mds-ham.com/RC1-Y-Digital-Rotor-Control.htm
>> http://www.greenheronengineering.com/
>>
>> 73 de Perry - K4PWO
>>
>> --------------------------------------------------
>> From: "Terrence R. Redding Ph.D." <terry at oltraining.com>
>> Sent: Sunday, January 17, 2010 11:54 AM
>> To: <towertalk at contesting.com>
>> Subject: [TowerTalk] Repairing Yaesu G-800SA
>>
>>> I need to trouble shoot my rotor control system.  I have a G-800SA. 
>>> Does
>>> someone know the output voltages of the four wires coming from the
>>> controller and can someone tell me how to test the rotor from the ground
>>> so
>>> I don't have to remove the rotor to do it.
>>>
>>> I am assuming that I have a controller problem, and that the rotor is
>>> fine.
>>> Therefore, I most likely will buy a new controller, and redo the control
>>> wires.  Are there aftermarket controllers to consider, or is my only
>>> choice
>>> to go with a replacement Yaesu controller?
>>>
>>> All comments appreciated.
>>>
>>> Terry
>
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>