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XT10 a la Alan Adler and S&T January 2002



 
 
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  #1  
Old July 11th 03, 04:20 AM
Rich McMahon
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Default XT10 a la Alan Adler and S&T January 2002

Stephen

I think thats whats preventing many people from doing surgery on there
tubes. Ive been looking for a differnt type of foam for to mount the
fan on. Im sure Ill run across it sooner or later.

Another thing you might like tyring is going to radio shack they have
a closeout going for indoor/outdoor car thermometers. There small
black and have the indaglo redout that you can trigger by touch. It
also has memory for high and low temp.. Ive affixed the sensor the the
back of my mirrror. The readout is affixed via velco to the tube. I
can readily see several degrees difference between the mirror and
outside air esp if temp is falling.

The rheostat that Del mentioned is a great idea esp if your scope
suffers from the shakes at high speed.

Best of luck

Rich


On Thu, 10 Jul 2003 10:15:51 -0400, "Stephen Paul"
wrote:

Excellent recommendation. Just so happens I have a number of mouse pads.

One thing I noted during the testing was that the thermals passing through
the image of an out of focus star, were slowly drifting, (lofting?), to and
fro without the fan. With the fan, the air mass was obviously accelerated,
all in one direction. I'm thinking this indicates the need to add a few more
exhaust holes, and slow the fan.

I may also be interpreting this as vibration interference patterns.

I think I'll start with Del's recommendation of lowering the fan speed. I
want to add a switched potentiometer anyway. Then, I'll consider an
alternative mounting scheme. (I'm really trying to keep this as "polished"
looking as I can, but in the end I will take function over form.)


  #2  
Old July 11th 03, 06:15 AM
Tom Hole
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Default XT10 a la Alan Adler and S&T January 2002


"Rich McMahon" wrote in message
...
Stephen

I think thats whats preventing many people from doing surgery on there
tubes. Ive been looking for a differnt type of foam for to mount the
fan on. Im sure Ill run across it sooner or later.

Another thing you might like tyring is going to radio shack they have
a closeout going for indoor/outdoor car thermometers. There small
black and have the indaglo redout that you can trigger by touch. It
also has memory for high and low temp.. Ive affixed the sensor the the
back of my mirrror. The readout is affixed via velco to the tube. I
can readily see several degrees difference between the mirror and
outside air esp if temp is falling.

The rheostat that Del mentioned is a great idea esp if your scope
suffers from the shakes at high speed.

Best of luck

Rich


Rich,

The best vibration isolation material I found for my fan mounting was the
xorbathane insert out of my running shoe. That stuf worked like a champ. I
put double sided foam tape on either side of it to stick the fan to the back
of my mirror cell.

Tom


 




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