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Re: Portable AZ-EL Rotator?



Hi Mark,
A construction article using such a device for an elevation rotator was
published in Oscar News #130 dated March 1998.  It was byOZ1MY from AMSAT-OZ
and I'm sure it was also published in the AMSAT JOURNAL about the same time.

73 Fred G6ZRU
Editor Oscar News
----- Original Message -----
From: Mark Fossum <mark@willetransport.com>
To: 'Roy Welch' <rdwelch@swbell.net>; Carl Lefebvre <Carl2@gte.net>
Cc: AMSAT BB <amsat-bb@AMSAT.Org>
Sent: 17 August 1999 23:14
Subject: RE: [amsat-bb] Portable AZ-EL Rotator?


> I've always wondered if it would be possible to homebrew a small AZ/EL for
> arrow style antennas out of those little electric srewdrivers that Black &
> Decker sells for $14.95. The gearing is almost perfect if it were combined
> with a screw gear. But then there's the control side and I'm not the one
> for that job.
>
> Come on guys! This would make a nice project article in the Amsat Journal!
>
> Mark
> -----Original Message-----
> From: Roy Welch [SMTP:rdwelch@swbell.net]
> Sent: Tuesday, August 17, 1999 3:26 PM
> To: Carl Lefebvre
> Cc: AMSAT BB
> Subject: Re: [amsat-bb] Portable AZ-EL Rotator?
>
> Is your friend's rotor an AZ/EL or the traditional polar mount rotator?
To
> use most of the AMSAT tracking programs you will need an AZ/EL rotator
> arrangement.
>
> Carl Lefebvre wrote:
>  >
>  > I was visiting with my neighbor last night who is an astronomy buff. As
>  > I  watched him position his new Telescope with his computer controlled,
>  > motor driven tripod, it occurred to me that such an apparatus might
make
>  > a great portable satellite AZ/EL rotator for a small array.  Your
>  > typical "Yeasu 5500" class rotator seems to be built with much larger
>  > wind load in mind than a "Arrow" or similar sized arrays.
>  >
>  > Has anyone tried using a telescope mount, or similar lighter duty servo
>  > device, to create a portable (or simply low-end) antenna positioner for
>  > the satellites?  I've just started working the satellites recently, but
>  > I'm not ready to shell out the cash required to put a serious AZ/EL
>  > rotator in operation.  For now, I am plowing ahead with my Eggbeaters,
>  > but still investigating other alternatives.
>  >
>  > I would welcome any feedback or suggestions from the group.
>  >
>  > -Carl
>  >
>  > PS. Someone already suggested the "Armstrong" method  :-)
>  >
>  > <<< First AMSAT Post >>>
>  >
>  > ---------------
>  > Carl Lefebvre
>  > W1NDS
>  > EL87
>  > Carl2@gte.net
>  > ---------------
>  >
>  > ----
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>
> --
> 73, Roy
>
> Internet: w0sl@amsat.org
> Home Page: http://home.swbell.net/rdwelch
> ----
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>
> ----
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>

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