Thread: May 20th h-alpha sun
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Old 21-05-2011, 09:28 PM
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Merlin66 (Ken)
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http://www.lightmachinery.com/Specif...t-Etalons.html
http://www.luntsolarsystems.com/foru....php?f=2&t=100
Some "light" reading on etalons and tilt vs pressure tuning
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