Re: [APML] st-4 looses guidestar

["Bobby Middleton" <bobm@koyote.com>]

Here are the symptoms on the prints. A set of double-vision images on one of
them....no trailing but double-stars with maybe 1 mm space in between them
on the 4x6 print. On the other there is the double-vision but on the second
set it is trailed. Will those symptoms fall in line with your diagnosis?

Bobby M.


http://www.koyote.com/users/bobm/word.htm

----- Original Message -----
From: Chuck Vaughn
> Bobby,
>
> You have a classic case of sticking relays. I can virtually guarantee
> you that's what is happening. If you can't isolate the exact one
> then replace them all. You might take a look at my article on this:
>
> http://www.aa6g.org/Astronomy/articles.html
>
> Since I performed the relayless mod on mine and two of my friends in
> 1991, none of us have had the the ST-4 mysteriously loose a guide star
> even one time.
>
> Chuck <aa6g@aa6g.org>
>
> -------------------------
>
> >I've had this a few times for no aparrent reason, but I'm inside the
house
> >catching naps between exposures so I really don't know if a small passing
> >cloud might have been the culprit or not on the previous times. Last
night
> >when I arose from my naps to end exposures I found the st-4 beeping away
on
> >2 of them with the guidestar being lost. On one I reset the find/focus
and
> >the star was still on the chip. Last night it was absolutly clear, so no
> >passing clouds were a problem. My optics weren't dewed up at all. I've
> >recently baked the dessicate ring (about December) so I think that is not
a
> >factor. Br readings were sensitive and consistant all night when I did
> >set-ups; as well as were corrections: 2's-3's on average at 2200mm FL.
This
> >has happened more often as of late; anybody want to suggest possible
causes?
> >Bobby Middleton
> >
> >
> >
> > http://www.koyote.com/users/bobm/word.htm
>
>
>
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