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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.) |
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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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