[amsat-bb] Re: Yaesu 5500 Rotor Problem

[Mark L. Hammond]

As I recall, there are reports about meters quitting/acting up because
of poor electrical connections with the screws that physically mount
(and electrically connect) the meters to the case/housing.   (maybe a
grounding issue?  I forget specifics...)

Worth checking, since that's about the easy thing to check!

Mark N8MH

On Fri, Jan 28, 2011 at 9:51 AM, Alan P. Biddle <APBIDDLE at united.net> wrote:
> Bill,
>
> Start by checking the connections in the shack at the controller.  If they
> are good, then disconnect lines 1, 2, and 3 on the elevation side and check
> the _cables_ with an ohm meter.  You should read 500 ohms between 1 and 3,
> and something intermediate between 1 and 2, and between 2 and 3.  If the
> antenna is parked, one of them will be close to 0 ohms, and the other almost
> 500 ohms, so it is better to point the antenna at 45 degrees or so.  You can
> see a clear difference, and eliminate a shorted or open line.  If this
> checks good, then the problem is inside the controller.
>
> If you don't, then you either have a bad connection in the cable or
> connector at the rotator, or the reference potentiometer is bad in the
> rotator.  The easiest way to check this is to swap the connectors at the
> rotators.  The systems are electrically identical.  If the problem follows
> the connectors, there is a problem in the cable or connector.  If not, it is
> in the rotator.
>
> Fixing the rotator pot is messy but straight forward, requiring only
> mechanical skills, and there have been several reports on how to do that.
> Fixing the controller depends on what is wrong.  In either case, Yaesu will
> repair them for a "modest" fee.
>
> Let us know what you find.
>
> Alan
> WA4SCA
>
>
> -----Original Message-----
> From: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org] On
> Behalf Of Bill Gillenwater
> Sent: Friday, January 28, 2011 8:21 AM
> To: AmsatBBS
> Subject: [amsat-bb] Yaesu 5500 Rotor Problem
>
> The meter for elevation on the Yaesu 5500 is not working. Any idea what
> might be wrong? Are there places to have them fixed if I can't shoot the
> bug? Thanks. Bill K3SV
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-- 
Mark L. Hammond [N8MH]