[amsat-bb] Fox Delta ST2 interface problem

Gus gus at 8p6sm.net
Tue Dec 2 19:55:15 UTC 2014

On 12/02/2014 02:19 PM, Tim Goodrich wrote:
> Hi All,
> I'm posting this here because the Fox Delta Yahoo group seems to be quite
> inactive and I haven't received any responses that might fix this problem
> yet.
> On my ST2, the azimuth indication doesn't stay at one heading. Instead, if
> it should be on say 210 degrees, it will rapidly change from 207, to 223, to
> 215, to 205, etc.. Fluctuating within a 15-20 degree range.  After being in
> contact with Dinesh and having replaced the PIC and crystal, the problem
> persists.
> Any ideas of what could be causing this?

Crap in the position-sensor pot?  Bad voltage regulation feeding the 
high side of the position-sensor pot? Faulty lead or connection? Does it 
get worse if you shake the lead coming out of the control head, or going 
into the rotator?

Gus 8P6SM
The Easternmost Isle

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