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ASTRO: telescope failure



 
 
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  #1  
Old February 28th 08, 07:43 PM posted to alt.binaries.pictures.astro
DvandenH
external usenet poster
 
Posts: 143
Default ASTRO: telescope failure

Hey all,
Ruined my telescope mount electronics.
When i gotoot my scope to M81 the cooling leads (with water) hit the mount
and disconnected from my camera.
The water got into the mount and electronics en shortened out the
electronics..
So for all you guys that uses cooling water to cool camera pls beware..

But fortunatly a local retailer offered me a RCX400 - 10" at a very good
price.
Per the 1 of July i am the proude owner of a 10"RCX400!
Till than no more pictures from me guys.
I will keep looking at your pictures and dream away..

Thx,
--
Dirk van den Herik

A journey of thousand lightyears
starts with the first step.

  #2  
Old February 28th 08, 08:01 PM posted to alt.binaries.pictures.astro
Rick Johnson[_3_]
external usenet poster
 
Posts: 262
Default ASTRO: telescope failure



DvandenH wrote:
Hey all,
Ruined my telescope mount electronics.
When i gotoot my scope to M81 the cooling leads (with water) hit the
mount and disconnected from my camera.
The water got into the mount and electronics en shortened out the
electronics..
So for all you guys that uses cooling water to cool camera pls beware..

But fortunatly a local retailer offered me a RCX400 - 10" at a very good
price.
Per the 1 of July i am the proude owner of a 10"RCX400!
Till than no more pictures from me guys.
I will keep looking at your pictures and dream away..

Thx,


Ouch! That's a nasty surprise. At least you'll be back in business in
a few months. Though July won't offer you much in the way of dark skies
I would think. It's bad enough here and you are farther north.

Fortunately, I can reach -20C nearly any night without water so never
use it. Much of the winter that is the ambient temp here! I get good
results even at -15C which happens one or two nights a year. The
cooling in the STL-11K easily does 45C at 80% power. Since most summer
nights are cooler than +20C, cooling hasn't been a problem in getting
enough. Sometimes I get too much and frost the front of the optical
window! At below -35C ambient the camera makes some nasty blooms. I
retarded a setting but see it still acts up some in 3x3 binning mode.
By matching the darks to the temperature and exposure time rather than
scaling them I see very little difference from -5C on down. The camera
does "age" rapidly so every couple weeks I redo the darks at the
standard exposure and temperatures I expect to use in the next couple
weeks. I suppose if I lived in Florida I'd have to consider water.

Rick

--
Correct domain name is arvig and it is net not com. Prefix is correct.
Third character is a zero rather than a capital "Oh".

  #3  
Old February 29th 08, 06:18 AM posted to alt.binaries.pictures.astro
Richard Crisp[_1_]
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Posts: 985
Default ASTRO: telescope failure

that's really a shame Dirk

I hate to hear of your accident.

I can't remember what was the scope mount and camera again that you were
using?


"DvandenH" wrote in message
bel.net...
Hey all,
Ruined my telescope mount electronics.
When i gotoot my scope to M81 the cooling leads (with water) hit the mount
and disconnected from my camera.
The water got into the mount and electronics en shortened out the
electronics..
So for all you guys that uses cooling water to cool camera pls beware..

But fortunatly a local retailer offered me a RCX400 - 10" at a very good
price.
Per the 1 of July i am the proude owner of a 10"RCX400!
Till than no more pictures from me guys.
I will keep looking at your pictures and dream away..

Thx,
--
Dirk van den Herik

A journey of thousand lightyears
starts with the first step.



  #4  
Old February 29th 08, 08:16 PM posted to alt.binaries.pictures.astro
Stefan Lilge
external usenet poster
 
Posts: 2,269
Default ASTRO: telescope failure

Dirk, sorry to hear about your mishap. The 10" RCX400 is not a bad change
though ;-)

Stefan

"DvandenH" schrieb im Newsbeitrag
bel.net...
Hey all,
Ruined my telescope mount electronics.
When i gotoot my scope to M81 the cooling leads (with water) hit the mount
and disconnected from my camera.
The water got into the mount and electronics en shortened out the
electronics..
So for all you guys that uses cooling water to cool camera pls beware..

But fortunatly a local retailer offered me a RCX400 - 10" at a very good
price.
Per the 1 of July i am the proude owner of a 10"RCX400!
Till than no more pictures from me guys.
I will keep looking at your pictures and dream away..

Thx,
--
Dirk van den Herik

A journey of thousand lightyears
starts with the first step.



  #5  
Old February 29th 08, 09:03 PM posted to alt.binaries.pictures.astro
DvandenH
external usenet poster
 
Posts: 143
Default ASTRO: telescope failure

Yep Stefan it sure was....
But i needed a new scope (following your example) so i poored some water in
it...:-)


--
Dirk


"Stefan Lilge" wrote in message
...
Dirk, sorry to hear about your mishap. The 10" RCX400 is not a bad change
though ;-)

Stefan

"DvandenH" schrieb im Newsbeitrag
bel.net...
Hey all,
Ruined my telescope mount electronics.
When i gotoot my scope to M81 the cooling leads (with water) hit the
mount and disconnected from my camera.
The water got into the mount and electronics en shortened out the
electronics..
So for all you guys that uses cooling water to cool camera pls beware..

But fortunatly a local retailer offered me a RCX400 - 10" at a very good
price.
Per the 1 of July i am the proude owner of a 10"RCX400!
Till than no more pictures from me guys.
I will keep looking at your pictures and dream away..

Thx,
--
Dirk van den Herik

A journey of thousand lightyears
starts with the first step.




  #6  
Old March 2nd 08, 02:23 AM posted to alt.binaries.pictures.astro
George Normandin[_1_]
external usenet poster
 
Posts: 1,022
Default ASTRO: telescope failure

"DvandenH" wrote

Ruined my telescope mount electronics.......



Wow! Sorry to hear that! I hope you can get back to observing and imaging
soon.

I once had a Coke end up in my laptop....... which ended up in the trash as
a result!

Since I mostly use other people's scopes, I resolved a long time ago not to
use water cooling. But I did use CO^2 (dry ice) packed around the camera for
a while. Open the valve on a CO^2 tank with a piece of cloth over the outlet
and you get a pile of dry ice "snow". I would than rubber-band the "bag" of
dry ice onto the camera. It really helped, but I don't need to do it with
the newer cameras.

George N


  #7  
Old March 2nd 08, 03:08 AM posted to alt.binaries.pictures.astro
Rick Johnson[_3_]
external usenet poster
 
Posts: 262
Default ASTRO: telescope failure



George Normandin wrote:

"DvandenH" wrote


Ruined my telescope mount electronics.......




Wow! Sorry to hear that! I hope you can get back to observing and imaging
soon.

I once had a Coke end up in my laptop....... which ended up in the trash as
a result!

Since I mostly use other people's scopes, I resolved a long time ago not to
use water cooling. But I did use CO^2 (dry ice) packed around the camera for
a while. Open the valve on a CO^2 tank with a piece of cloth over the outlet
and you get a pile of dry ice "snow". I would than rubber-band the "bag" of
dry ice onto the camera. It really helped, but I don't need to do it with
the newer cameras.

George N


Good ol' TRI-X days. I remember figuring if dry ice was good, liquid
nitrogen would be even better. I rigged a tank and way to vent the gas
over the film to keep it dry. Worked well until I advanced the film. I
knew it would need to cool down but I didn't wait long enough. I had a
nice shot of UFO's however. All sorts of spider and arrowhead shaped
images on the film covering the film, even parts not exposed to light.
I finally determined the arrowheads were due to pressure ridges where
the film crinkled trying to roll over the rollers. The spiders where
static discharge sites.

It was back to dry ice.

Rick

--
Correct domain name is arvig and it is net not com. Prefix is correct.
Third character is a zero rather than a capital "Oh".

  #8  
Old March 2nd 08, 04:59 AM posted to alt.binaries.pictures.astro
John N. Gretchen III
external usenet poster
 
Posts: 460
Default ASTRO: telescope failure

Wow... Really sorry to hear that Dirk

DvandenH wrote:
Hey all,
Ruined my telescope mount electronics.
When i gotoot my scope to M81 the cooling leads (with water) hit the
mount and disconnected from my camera.
The water got into the mount and electronics en shortened out the
electronics..
So for all you guys that uses cooling water to cool camera pls beware..

But fortunatly a local retailer offered me a RCX400 - 10" at a very good
price.
Per the 1 of July i am the proude owner of a 10"RCX400!
Till than no more pictures from me guys.
I will keep looking at your pictures and dream away..

Thx,


--
John N. Gretchen III
N5JNG NCS304
http://www.tisd.net/~jng3
  #9  
Old March 2nd 08, 09:28 PM posted to alt.binaries.pictures.astro
Peter Hucker
external usenet poster
 
Posts: 94
Default ASTRO: telescope failure

On Sun, 02 Mar 2008 01:23:08 GMT, "George Normandin"
wrote:

"DvandenH" wrote

Ruined my telescope mount electronics.......



Wow! Sorry to hear that! I hope you can get back to observing and imaging
soon.

I once had a Coke end up in my laptop....... which ended up in the trash as
a result!


C|NK?
--
This message has been brought to you by solar and wind power. Who needs the national grid?
http://www.petersparrots.com http://www.insanevideoclips.com http://www.petersphotos.com

An Italian, a German and an Australian football fan were arrested in a small Arabian state when they were caught pi$$ing on a religious building after an all night drinking binge.
The trio have to face up to the local sultan and are dished out the typical punishment for religious desecration - 20 lashes of the whip to the back.
But the Sultan was a big football fan so he kindly granted them two wishes each - but they were not allowed to decrease the number of lashes or the type of punishment.
The Italian says " Well we are the World Champions so I go first. I want the pleasure of a beer and a pillow.".
The Sultan grants his wishes.
With a wide grin the Italian drinks his beer and binds the pillow to his naked back.
But after 10 lashes the pillow falls apart and he has to painfully endure the remaining 10 lashes which leave deep welt marks on his back.
The German saw all this and spends a few minutes thinking before smiling. "I would like to have two pillows for my back".
The Sultan thinks about the uniqueness of the wishes but decides to grant it given he has used up his two wishes in one go.
However after 15 lashes of the whip both pillows have fallen apart and the German has to painfully endure the remaining 5 lashes which leave deep welt marks on his back.
The Australian is grinning from ear to ear and mutters something under his breath about a bull**** penalty.
"Ok my first wish is to double the number of lashes to 40." There is stunned silence in the hall.
The Italian, German and Sultan are a little surprised at the first wish but then remember the strong fighting performance the Aussies put up during the World Cup in Germany 2006.
The Italian and German look at each other and nod in admiration - obviously this Aussie wants to show how tough he is.
The Sultan ask the Aussie for his second wish. "Tie the Italian to my back" he replies.
  #10  
Old March 3rd 08, 02:01 AM posted to alt.binaries.pictures.astro
George Normandin[_1_]
external usenet poster
 
Posts: 1,022
Default ASTRO: telescope failure


"Rick Johnson" wrote

Good ol' TRI-X days. I remember figuring if dry ice was good, liquid
nitrogen would be even better. I rigged a tank and way to vent the gas
over the film to keep it dry. Worked well until I advanced the film. I
knew it would need to cool down but I didn't wait long enough. I had a
nice shot of UFO's however. All sorts of spider and arrowhead shaped
images on the film covering the film, even parts not exposed to light. I
finally determined the arrowheads were due to pressure ridges where the
film crinkled trying to roll over the rollers. The spiders where static
discharge sites.

It was back to dry ice.


Rick,

I have two friends who are still grinding away with film
astrophotography. Both use an N^2 feed to the camera to keep the film dry,
but neither has tried liquid N!! After hearing all the 'horror stories'
from the Cornell astro dept about using liquid N in their near-IR rigs I
figured it would be a good thing to stay away from. I might go back to
trying dry ice packs on the CCD camera, but with the clear-night temps we
have right now there's no need to even cool the camera!

Now if I could just *get* a clear night.......

George N


 




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