i built a deck using this technology... http://www.deckplans.com/05_howto_deckbasics.html i have seen people put sheds on these blocks as well. if you are...
A short note with a big THANK YOU to all who replied. I received some great ideas and will keep you posted as to decision and progress. Again thanks to all and...
i have an 18 in obsession and one my teflon bearings fell off has anyone used roller bearing or should i stick with teflon. any information will help. thnax...
John, Stick with the teflon. Call Dave and ask him to sell you a pad or two. You'll need to apply it with contact cement. Clean the surface first. It's ...
I disagree with Michelle. I have an Astrosystems Dob which uses both teflon and roller bearings. I have used mine for several years and it is very smooth (and ...
... For another datapoint, I have a TeleKit with roller/Teflon. In altitude, they're great. In azimuth, the roller/brake system is, to me, too sensitive. I can...
I have going to construct a solar filter (description follows). If anyone has done something similar, I would like to hear about it ... especially if you have...
I see two big problems here with positioning the filter on top of the mirror box: 1) The Baader material works by reflecting the vast majority of the incoming...
Paul, You are so right. I made a 6" Baader filter for my 17.5" TeleKit. It fit over the mirror cover that had a 6" off-axis hole in it. I placed the filter...
I would not trust any clamping scheme and would prefer a "cap" made to be held in place with gravity. Clamps can fail, gravity rarely does. rolandlinda3...
... I've seen 1000s of dobs and the smoothest, most controled ones are the ones with the teflon bearings. If you NEVER hand guide, and only use the servocat,...
My mistake on the original post...my filter arrangement is planned for covering the top end of the upper (secondary mirror) cage. I had a case of brain freeze...
... I figured that had to be the case. :-) How do you plan on shrouding the trusses? I wouldn't trust the usuual sort of pull-over cloth or tarp-type shroud...
Hello everybody. This is the first time I post in this group. I´m spanish, so please excluse my poor english and this unusually long post. Some months ago I...
... itself (its beautyfull, isn´t it), and another of the estar test. ... Ángel, this yahoo group does not deliver attachements to emails. Post your images...
Ups, aparently this group doesn´t allow attached images. I have created a new album in the Photos section of the group, called "star test 16 inch". You can...
I do not see the picture probaly the attach not permit BUT why not put a 5X barlow on also there you have the guaranty of bad result I thing you try to push...
Hello again. Thanks for your interest. This is the direct link to the images: http://ph.groups.yahoo.com/group/bigdob/photos/browse/f6d8 I´m familiar with...
... explanationn might be ... this (simulation on the ... That's right! Mauro has showed me how to calculate the PV error for the simulations (Thanks Mauro!)....
Hi Roger. Thank you and Mauro, your website is amazing. Like I said before, the star test was performed with the mirror at full equilibrium. I didn´t have the...
Angel, have a look at Steve Koehler's Diffract.r program for an alternative to Aberrator. See http://www.visi.com/~mkoehler/optics_tools/ (start with the...
Hi Angel & All, You wrote: "The report with the mirror stated that this mirror is 1/9.1 PV, 1/32 RMS, 0.961 Strelth. A mirror this good should have a nearly...
Angel, I have added a simulation picture in your folder. Select the "Large" view to get a better view. It's an output from a simulation I did with Steve...
Teflon tends to be self lubricating where as steel et al will need much more lubrication and can be messy. If you have a choice go with graphite or telfon...
Paul, My plan includes oversized boards at the upper cage for starters. My shroud is pretty heavy in terms of density. I have through of drapping one of...
Building a safe aperture filter and securing it to the upper cage assembly is, IMO, the easy part. The weak link in the system is a light-proof cover for the...
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