Re: [APML] SBIG ST-4 frost problems

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

You have to remove the front nosepiece; 4 small screws will free this piece.
Then you will see the ring. Some st-4's had the ring glued to the base and
if yours is you will probably break the ring as I did when trying to loosen
it from the glue. You can get more from SBIG. Bake the ring for 4 hours at
300 deg....or is it 3 hours at 400 deg <g>. Probably doesn't matter but SBIG
will tell you tomorrow if you want to know for sure.  Be cautious of the
tiny wiring and connectors behind the ring!
Bobby Middleton

http://www.koyote.com/users/bobm/word.htm
----- Original Message -----
From: Alan Brent Jordan <aljordan@gwi.net>
To: <astro-photo@seds.org>
Sent: Sunday, June 04, 2000 5:12 PM
Subject: [APML] SBIG ST-4 frost problems


> Hello,
>
> I own an ST-4 which is only about a year old.  Frost has built up on the
> inside of the little chip window the last few nights I have used it.
> Last night, frost built up over the course of the evening even though
> humidity was very low.  I remember from the list a while back that
> people will remove the dessicant ring and bake it in the oven to help
> with problems like these.  I looked at my ST-4, but I have no idea which
> part is the dessicant ring.  Could someone give details on what the ring
> looks like, as well as how long to bake it for and what temperature?
>
> Thanks,
> Alan Jordan
> aljordan@gwi.net
>
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