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Equipment Discussions >> Observatories

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Madratter
Post Laureate


Reged: 01/14/13

Re: Reviving an old observatory or start over? new [Re: DGB]
      #5649925 - 01/29/13 09:44 AM

Quote:

Quote:

I already feel confident enough with these changes to leave my C6-RGT out in the shed with a big garbage bag over it. I'm still reluctant to put the 20" out there during rain until I see how things go. It will probably be OK once I get a pad of some sort under where it goes.

I do have a question for you other Dob owners. How do you protect your secondary when you leave it in a observatory? I wasn't doing so but I really would rather have some kind of simple protection on it. But it has to come on and off easily, and I need to be sure I don't end up damaging the secondary doing so, or changing the collimation.



To cover the secondary... Why of course: a Crown Royal bag! (I actually go around to the ABC stores here in Virginia and gather them up to hand out to DOB owners at different astronomy gatherings. Yes, I show them pictures of my efforts!) I agree you will want to put down a solid concrete base for the 20". Additionally for the rest of the observatory, I would consider a pressure treated decking of sorts independent of the concrete base for the 20". Get's you sightly up off the ground and easier when you drop something on wood vs concrete. Have you priced decking materiel? (Of course, a 20" box fan and two hours head start blowing on the mirror is always good advice too.)




Thanks for the idea! How about covering the primary. Do you think just the cover for the rocker box is sufficient or do you take additional measures?


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csa/montana
Den Mama
*****

Reged: 05/14/05

Loc: montana
Re: Reviving an old observatory or start over? new [Re: Madratter]
      #5649966 - 01/29/13 10:11 AM

I never use the primary cover. Instead I have breathable end covers & then use a TeleGizmos cover, even though my dobservatory is very tight, & has never had moisture in it.

I would highly recommend a TeleGizmos cover for your dob, if you leave it in your shed, until you get it to where there's no leakage.

Telegizmos


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Madratter
Post Laureate


Reged: 01/14/13

Re: Reviving an old observatory or start over? new [Re: csa/montana]
      #5651225 - 01/29/13 09:41 PM

Quote:

I never use the primary cover. Instead I have breathable end covers & then use a TeleGizmos cover, even though my dobservatory is very tight, & has never had moisture in it.

I would highly recommend a TeleGizmos cover for your dob, if you leave it in your shed, until you get it to where there's no leakage.

Telegizmos




I'd been to their site before, but somehow missed the fact they actually had covers big enough for my Dob. Thanks for making me check again.

Edited by Madratter (01/29/13 09:42 PM)


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csa/montana
Den Mama
*****

Reged: 05/14/05

Loc: montana
Re: Reviving an old observatory or start over? new [Re: Madratter]
      #5651365 - 01/29/13 11:20 PM

You're welcome; you simply cannot go wrong with one of their covers. They have them in the verticle position, or the park position, also. Very good covers!

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DGB
member
*****

Reged: 05/12/08

Loc: Reva, Virginia USA
Re: Reviving an old observatory or start over? [Re: Madratter]
      #5651767 - 01/30/13 08:18 AM

Quote:

Quote:

Quote:

I already feel confident enough with these changes to leave my C6-RGT out in the shed with a big garbage bag over it. I'm still reluctant to put the 20" out there during rain until I see how things go. It will probably be OK once I get a pad of some sort under where it goes.

I do have a question for you other Dob owners. How do you protect your secondary when you leave it in a observatory? I wasn't doing so but I really would rather have some kind of simple protection on it. But it has to come on and off easily, and I need to be sure I don't end up damaging the secondary doing so, or changing the collimation.



To cover the secondary... Why of course: a Crown Royal bag! (I actually go around to the ABC stores here in Virginia and gather them up to hand out to DOB owners at different astronomy gatherings. Yes, I show them pictures of my efforts!) I agree you will want to put down a solid concrete base for the 20". Additionally for the rest of the observatory, I would consider a pressure treated decking of sorts independent of the concrete base for the 20". Get's you sightly up off the ground and easier when you drop something on wood vs concrete. Have you priced decking materiel? (Of course, a 20" box fan and two hours head start blowing on the mirror is always good advice too.)




Thanks for the idea! How about covering the primary. Do you think just the cover for the rocker box is sufficient or do you take additional measures?




Within my observatory, I use an 11 watt light hooked to a timer (4am till 10am) inside of the mirror box, with the mirror box lid in place. No cover over the entire scope other than the Obsession shroud, however my Wife did make a nice 'dust cover' which I occasionally use between observing sessions. Commercial products are always nice, however I prefer a more 'personalized' approach.


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Madratter
Post Laureate


Reged: 01/14/13

Re: Reviving an old observatory or start over? new [Re: DGB]
      #5657255 - 02/01/13 10:19 PM

So here I am, sitting in my warm office, wishing I was out observing tonight. It is killing me because a) it is clear and b) I did about 4 hours work on the observatory today.

I got 20 8x16x4 blocks that weigh about 30 pounds a piece to make a temporary platform for my Dob to get it off the ground. Those had to be carried 1 by 1 from the car to the observatory. Each trip is probably about 100+ yards there and back. So I put in about well over 1 mile just walking the block to the observatory. Then I put up some plywood screens I can raise when the roof is rolled off so I can block two lights I find particularly egregious (a street light at a guys barn a couple hundred yards away, and a neighbors porch light).

Anyway, I can stand the cold; it is about 22 degrees outside. But the wind is more than I want to mess with.

Edited by Madratter (02/01/13 10:20 PM)


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Madratter
Post Laureate


Reged: 01/14/13

Re: Reviving an old observatory or start over? new [Re: Madratter]
      #5661472 - 02/04/13 10:39 AM

Latest work is I added a 20"x36" shelf with some plywood and 3 brackets attached to studs. I made it primarily to hold a laptop computer. I built it high enough that I can use the computer standing up. I also built a small lip on the shelf so that it will help retain the computer and make it less likely to hit the floor.

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Madratter
Post Laureate


Reged: 01/14/13

Re: Reviving an old observatory or start over? new [Re: Madratter]
      #5710587 - 03/03/13 12:47 PM

Yesterday, I finally got the last two of eight wheels rolling properly again for the roof. It is so nice having it roll easily again. Where before it was a strain with two hands, now it is much easier with just one. I just wish I had used much higher quality wheels the first time around. Retrofitting in new wheels would have been quite difficult so I'm really glad I don't have to, at least for now. It wasn't keeping me from using it, but it was doing a number on my shoulder.

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