best modification for a dob?

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Tom
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Posted: Sat Apr 12, 2008 5:41 pm
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Cary, noted and bookmarked. I have a 12" that will be eventually sent your way...probably next winter though. I need to make it a new house first.

Glad you are back up and running. When do you expect to get the higher aluminum reflectivity process on line?

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werewolf6977
Post subject: Best Modification For A Dob
Posted: Tue Apr 22, 2008 6:55 pm
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Shame on y'all!! I'm surprised no-one has mentioned Ebony Star and Teflon, or Magic Sliders w/automotive wax on the top board.


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rboe
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Posted: Tue Apr 22, 2008 7:00 pm
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We're talking scopes, not kitchen remodels......

Oh wait. :ohmy:

(just padding to make it into the top 10 :p )


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llanitedave
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Posted: Tue Apr 22, 2008 7:42 pm
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You've got a long way to go, Ron. The post-padding competition is intense! :lol:


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Erik
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Posted: Tue Apr 22, 2008 8:00 pm
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Yeah, you need like, what 75 posts?!? :lol:

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-Erik Wilcox
Homebuilt 16" Truss Dob
8" Antares f/5 Newt
SV 80mm ED Nighthawk NG on M1 ALT/AZ
Nikon Prostaff 65mm spotter on Trekpod
Konusvue 20x80 binos/Peterson PipeMount


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Tom
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Posted: Sat Apr 26, 2008 2:14 pm
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Dang Erik, you're almost at 1000 already!

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rboe
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Posted: Sat Apr 26, 2008 4:09 pm
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Fewer posts are deleted over here..... :poke:

Fine Woodworking has an article on phenolic plywood in the latest issue. Looks like the main issue will be finding it near you in colours you would like.

I was all hot for it till I found out the closest is stocked in Lost Wages and shipping will run about $40 - and they run $55 a sheet. And only comes in brown. I want red, or at least green.

Looks like it would make killer shop cabinets too.


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nightskystargazer
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Posted: Fri Feb 13, 2009 7:43 am
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My friend is making my 10" Newt. into a Dob.

It a f6.3 so it is pretty long, in fact it will not fit into my car now, so we decided to cut the fiber glass tube in half, so I can get both halfs into my car.

Thanks,

Tom


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Sherk
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Posted: Sat Feb 14, 2009 12:29 am
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I wonder why no one suggested a GEM with GOTO :?:


Don't shoot, I'm already gone. :mrgreen:

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Erik
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Posted: Sat Feb 14, 2009 11:45 am
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nightskystargazer wrote:
My friend is making my 10" Newt. into a Dob.

It a f6.3 so it is pretty long, in fact it will not fit into my car now, so we decided to cut the fiber glass tube in half, so I can get both halfs into my car.

Thanks,

Tom
looking forward to seeing what you come up with, Tom. I converted a couple of scopes into split tubes, and it's a great modification. Please post pics when you finish. :)

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-Erik Wilcox
Homebuilt 16" Truss Dob
8" Antares f/5 Newt
SV 80mm ED Nighthawk NG on M1 ALT/AZ
Nikon Prostaff 65mm spotter on Trekpod
Konusvue 20x80 binos/Peterson PipeMount


"Newt Gingrich is what stupid people think smart people sound like."
-The Great Paul Krugman

Evolution is both fact and theory. Creationism is neither. -Anonymous


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nightskystargazer
Post subject: Cut in Half
Posted: Mon Feb 16, 2009 8:03 am
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Bierbelly, Erik, and llanitedave,

Well you are talking the the one that has cut his 10" f/6.3 Newt, and turn it into a Dob. :razz: It was a Parks Fiber Glass Tube, It was too long to get into my Saturn Car, so what am I suppose to do :?: :?: :?:

Thanks,


Tom


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Erik
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Posted: Mon Feb 16, 2009 9:26 am
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Hi Tom,

I'm looking forward to hearing more about your dob. I considered buying one of the Parks fiberglass tubes when I originally cut my dob in half. In the end, I went with the sonotube I already had because I was worried about the stability of the fiberglass tube, given that the middle of the Parks tube walls are thinner than the ends (the ends are reinforced and quite a bit thicker). I ended up using the metal shafts from the Meade mirror cell (which I had extra because I'd replaced the cell) as tube connectors. It worked fabulously, and the only reason I eventually ended up converting it to a truss was because of the long cooldown times with a large solid tube dob. The weight was also an issue because of the heavy sonotube (even in two pieces, the bottom portion weighed over 50 lbs). Now my whole OTA weighs just over 50 lbs, and cooldown isn't an issue. However, if I'd had a permanent observatory at the time, I'd have likely kept the split tube.

So please tell me more about your conversion. Did you buy a kit to connect the tubes together? Does the collimation fluctuate? :)

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-Erik Wilcox
Homebuilt 16" Truss Dob
8" Antares f/5 Newt
SV 80mm ED Nighthawk NG on M1 ALT/AZ
Nikon Prostaff 65mm spotter on Trekpod
Konusvue 20x80 binos/Peterson PipeMount


"Newt Gingrich is what stupid people think smart people sound like."
-The Great Paul Krugman

Evolution is both fact and theory. Creationism is neither. -Anonymous


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llanitedave
Post subject: Re: Cut in Half
Posted: Mon Feb 16, 2009 9:42 pm
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Quote:
... so what am I suppose to do :?: :?: :?:

Thanks,


Tom


You're supposed to show us pictures, that's what you're supposed to do! :eureka:

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Chopin
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Posted: Tue Feb 17, 2009 4:17 pm
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Yes, pictures are mandatory! :razz:

Tom, sounds like a nice scope. One immediate advantage to the truss, In my mind, is being able to use shorter trusses when needed to work with binoviewers without an optical corrector. I keep saying that one of these days I'm going to turn my Hardin into a truss dob... We'll see if that ever happens.

So yes, back on topic... images!

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