The tuning on my Lunt 60 THa seems to have changed. Before at each end the disk was featureless except for sunspots, with all the detail brought out when the tuning wheel was near the center of its travel. Now only one end is featureless, and the best tuning is at or near the other end with no de-tuning beyond that.
Does this sound like something is wrong?
Lunt 60 Tha tuning
Lunt 60 Tha tuning
Dr. Willie Yee
President, Mid-Hudson Astronomical Association
Commander, Prius-class shuttlecraft Zhang Heng
President, Mid-Hudson Astronomical Association
Commander, Prius-class shuttlecraft Zhang Heng
Re: Lunt 60 Tha tuning
Not sure, but it sounds to me that you may have turned the wheel past its limit and started on a new thread position. I know that might seem hard to understand, but its hard to explain.
When I got my LS60f the instructions were to turn the tuning wheel but not to force it past the stop. I did accidentally go too far and the adjusting wheel seemed to start tuning again but with a pre-tilt on the etalon. I carefully turned the wheel back again to its original position and its fine now.
Of course I could see the LS60f etalon and could see what had happened, but with your etalon being inside the scope, you may not be able to see this at all.
When I got my LS60f the instructions were to turn the tuning wheel but not to force it past the stop. I did accidentally go too far and the adjusting wheel seemed to start tuning again but with a pre-tilt on the etalon. I carefully turned the wheel back again to its original position and its fine now.
Of course I could see the LS60f etalon and could see what had happened, but with your etalon being inside the scope, you may not be able to see this at all.
Allan
Re: Lunt 60 Tha tuning
Well, the problem continues. There is something wrong with the tuning, and I feel I am not getting the full range out of it. Is it time to contact Lunt?
Dr. Willie Yee
President, Mid-Hudson Astronomical Association
Commander, Prius-class shuttlecraft Zhang Heng
President, Mid-Hudson Astronomical Association
Commander, Prius-class shuttlecraft Zhang Heng
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Re: Lunt 60 Tha tuning
that makes perfect sense as the air pressure has changed drastically with the season. Has the temperature changed a lot since you got the good tuning in the center? Have you changed altitude by any chance?
Stephen W. Ramsden
Atlanta, GA USA
Founder/Director Charlie Bates Solar Astronomy Project
http://www.solarastronomy.org
Atlanta, GA USA
Founder/Director Charlie Bates Solar Astronomy Project
http://www.solarastronomy.org
Re: Lunt 60 Tha tuning
Well, it did get warmer as summer came. No change in altitude.
Dr. Willie Yee
President, Mid-Hudson Astronomical Association
Commander, Prius-class shuttlecraft Zhang Heng
President, Mid-Hudson Astronomical Association
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Re: Lunt 60 Tha tuning
well, thats why it has such a wide range, to compensate for changes in air pressure due to heat or altitude. It wont always be "in tune" in the same place, or there wouldnt be a need for a tuner...lol
Stephen W. Ramsden
Atlanta, GA USA
Founder/Director Charlie Bates Solar Astronomy Project
http://www.solarastronomy.org
Atlanta, GA USA
Founder/Director Charlie Bates Solar Astronomy Project
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Re: Lunt 60 Tha tuning
Hi Willie
don't worry be happy. You can always show us pics from what you get and we can comment on them
don't worry be happy. You can always show us pics from what you get and we can comment on them
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE
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Re: Lunt 60 Tha tuning
Pictures I am not so good at. But the problem seems to be getting worse. I cannot get a good overall tuning of the disk. Time to call Lunt methinks.
Dr. Willie Yee
President, Mid-Hudson Astronomical Association
Commander, Prius-class shuttlecraft Zhang Heng
President, Mid-Hudson Astronomical Association
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Re: Lunt 60 Tha tuning
Hi Willie
they will most probably also ask for pics in order to better understand what happens at your end
they will most probably also ask for pics in order to better understand what happens at your end
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE
from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa
from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa