[Date Prev][Date Next][Thread Prev][Thread Next] - [Date Index][Thread Index][Author Index]

Re: Dead G-5400B



Dear Dark,

     check the directional switches on the control box.  in the last three
months, i've had two go bad (short) on me.  i'm using the G-400 square box
and the old Kenpro KR-500; both have worked flawlessly up till now.  i order
two from Yeasu for ten dollars when the first one cratered; i used the spare
this past week.  although this does not discount the probability of actual
rotor probelms/damage, a shorted switch could have forced the rotor to the
stops despite attempts by software to override.

Tom Webb, WA9AFM

----- Original Message -----
From: Dark Avenger <dark_avenger@mindspring.com>
To: <amsat-bb@AMSAT.Org>
Sent: Sunday, January 23, 2000 10:03 AM
Subject: [amsat-bb] Dead G-5400B


>
> Dear Satellite Colleagues,
>
> After the much vaunted Y2K I was forced to abandon my faithful 16 bit
> Wisp. The 32 bit version  ran strangely but benignly until last night.
> This morning I found the computer locked up and my G-5400 driven hard
> into the stops.
> The elevation rotator has been convinced to work but the azimuth
> rotator seems to be dead.
>
> I went up to the roof and pushed the array and I can hear the gear
> train so the plastic motor gear is still intact. My schematic
> indicates a thermal fuse on the ground return of both rotors but the
> parts break down does not list it. Can anyone shed some light on this?
> I don't remember seeing such a part in the rotator I took apart a
> couple of years ago.
>
> I am still diagnosing the failure and have yet to check voltage out of
> the controller but since the elevation rotator works I don'e expect to
> find the problem there.
>
> Obviously I can fix or replace the azimuth rotator but the computer
> problem will discourage unattended operation until I can get to the
> bottom of that.
>
> My computer is an old AST P75 with 16MB of memory running W95revA
> I would prefer not to change the computer as it is RF quiet in the
> shack.
>
> Thanks for any help or suggestions.
>
> 73 Jerry KK5YY
>
> ----
> Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
> To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
>

----
Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org



AMSAT Top AMSAT Home