I had a similar problem with a prop pitch rotator. If it continues to
loose calibration, you can try changing the reed switch. If that does
not work, I am sure that W2FU can help you with the controller.
John KK9A
On 2013-09-17 10:34, Andreas Hofmann wrote:
> John,
>
> The alpha spid rotator uses a magnetic reed switch and is advertised with a 1
> degree precision (http://alfaradio.ca/alfaspid-1.html [1]). Also, I can still
> turn the antenna and the controller advances the reading, it is just off by
> the fixed offset.
>
> Will see if I can just reapply the offset.
>
> Thanks
> Andreas
>
> -----Original Message-----
> From: john@kk9a.com [mailto:john@kk9a.com]
> Sent: Tuesday, September 17, 2013 4:19 AM
> To: towertalk@contesting.com
> Cc: Andreas Hofmann
> Subject: re: [TowerTalk] Green Heron + Alpa Spid, suddenly 30 degrees off
>
> I am not sure what type of sensor the Alpa Spid uses. I recently had a
> potentiometer in a TIC ring get very tight and all of a sudden that antenna
> was not pointing where the controller said it was. If the Alpa Spid uses a
> pot, do you have another controller that you can try? With the Green Heron
> controller, it is possible to accidentally change the offset or direction
> reading (if using a reed switch). If this is a common problem for you, I
> believe that you can lock the menu.
>
> John KK9A
>
> To: "towertalk@contesting.com" <towertalk@contesting.com>
> Subject:[TowerTalk] Green Heron + Alpa Spid, suddenly 30 degrees off
> From: Andreas Hofmann <Andreas.Hofmann@microsoft.com>
> Date: Tue, 17 Sep 2013 04:26:49 +0000
>
> Hi,
>
> I noticed that my beam heading is off about 30 degrees suddenly. It does not
> appear that the mast has come loose. I am guessing the offset setting just
> somehow got lost. Before I go in the settings and fix the value, I wanted to
> ask here.
>
> Does anyone had this happen to them and/or does anyone have an idea what
> could be wrong? Could a power outage cause this?
>
> Thanks
> Andy,
> KU7T
Links:
------
[1] http://alfaradio.ca/alfaspid-1.html
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