[amsat-bb] Re: G5500B Rotor Repair
mikewm9v at gmail.com
Wed Aug 11 13:21:12 PDT 2010
somewhere on the internet are pics of the interior of a yaesu rotor with
mods by adding 1n4002 diodes in the rotor
can't seem to find it
On Wed, Aug 11, 2010 at 2:33 PM, i8cvs <domenico.i8cvs at tin.it> wrote:
> Hi Andy, WA9WUA
> The limit switches SW6 and SW7 are normally closed during the intire
> rotation and opens only at 0° and 360°
> If your rotator on the bench without the antenna vertical loading runs very
> smooth through the entire rotation probably the torque is very weak under
> mechanical antenna load because the AC electrolitic capacitor C 34 of
> 100 uF inside the rotator losted capacity.
> Put the rotator into the grips of a vise .Slip a pipe into the boom tube
> while running the rotator try if you are able to stop it with the force of
> both your hands.
> If the capacitor is OK you must not be able to stop the rotation.Both limit
> switches seems to be out of question.
> Best 73" de
> i8CVS Domenico
> ----- Original Message -----
> From: "Andrew" <WA9WUA at embarqmail.com>
> To: <amsat-bb at amsat.org>
> Sent: Wednesday, August 11, 2010 11:37 AM
> Subject: [amsat-bb] G5500B Rotor Repair
> > Hi Dom,
> > I have the G5500B on the bench and it runs very smooth through the intire
> > rotation. It does travel 360 and to the 90 degree point and keeps
> > I think the limit switch on this end of rotation is defective. I will put
> > under loaded condition and see if it hangs up. I will not put it back in
> > service without opening it up and checking it out. Thank you for your
> > good explanation of the possible problem.
> > 73, Andy
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