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Equipment Discussions >> Reflectors

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rowdy388
member


Reged: 04/09/13

Loc: Saratoga County, NY
Re: Mega-mod thread for Zhumell dobs new [Re: csrlice12]
      #6339539 - 01/27/14 08:05 PM

Hey, lots of great ideas here. Not sure which option I'll take but I'll let everyone know how my solution worked.
The focuser is very secure as is.....I used that monster 3+ pound Meade 30 UWA with a Paracorr to view M81 and M82 with supernova. Froze my butt off but worth it.
No issues with stability but now I'm asking myself if I'm pushing my luck!

I may still get the new base for a custom fit but I love that idea of using a window weatherstrip with sticky peeloff.

Thanks for all your great suggestions guys.
Dave Y


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Tristan
sage


Reged: 06/07/11

Loc: NC
Re: Mega-mod thread for Zhumell dobs new [Re: petrus45]
      #6339574 - 01/27/14 08:26 PM

The replacement does not match the outside diameter of the tube. checking the Agena Astro web site it lists the curve diameter of the plate made for GSO 12" scopes as 11.93" The actual diameter of the tube is a bit beyond 14". I believe this is the problem those of us who own some of these newer models have run into. Not even the factory replacement fits correctly.

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rowdy388
member


Reged: 04/09/13

Loc: Saratoga County, NY
Re: Mega-mod thread for Zhumell dobs new [Re: Tristan]
      #6339601 - 01/27/14 08:39 PM

Tristan,
I just saw that as well. Looks like your idea of a window sealing foam or Kens idea of Joanne felt fabric is the way I'm going to go. Thanks, Dave Y


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Pinbout
Postmaster
*****

Reged: 02/22/10

Loc: nj
Re: Mega-mod thread for Zhumell dobs new [Re: rowdy388]
      #6339684 - 01/27/14 09:20 PM

Quote:

The focuser on my Z12 does not mate flush with the OTA. The focuser base is curved for a smaller tube probably because they are more popular. There is a gap where light, dust, spiders, whatever can get inside.






really? your concerned about that? Oh Lawd! [lord with a southern accent]

don't ever use the older jmi focusers on a home build if that bothers you. let alone a kineoptic helical focuser. that has some many open cracks you'd think it was an addict.

never gave it any mind.

worried about spiders? at least you probably never had a frog in you scope.



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kfiscus
Carpal Tunnel
*****

Reged: 07/09/12

Loc: Albert Lea, MN, USA
Re: Mega-mod thread for Zhumell dobs new [Re: Pinbout]
      #6339765 - 01/27/14 09:57 PM

A frog?!? Do tell.

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rowdy388
member


Reged: 04/09/13

Loc: Saratoga County, NY
Re: Mega-mod thread for Zhumell dobs new [Re: Pinbout]
      #6339938 - 01/27/14 11:36 PM

Do you have one of those open truss mods where a cat can jump through it?
I'd like to hear your frog story as well...made me laugh!
Dave Y


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petrus45
sage
*****

Reged: 01/31/11

Loc: SW Ohio / N Ky.
Re: Mega-mod thread for Zhumell dobs new [Re: Tristan]
      #6340850 - 01/28/14 12:21 PM

Quote:

The replacement does not match the outside diameter of the tube. checking the Agena Astro web site it lists the curve diameter of the plate made for GSO 12" scopes as 11.93" The actual diameter of the tube is a bit beyond 14". I believe this is the problem those of us who own some of these newer models have run into. Not even the factory replacement fits correctly.




Seems a shame the newer models would not be standard sized....


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David Castillo
Carpal Tunnel
*****

Reged: 09/09/06

Loc: Carmel Valley, Ca
Re: Mega-mod thread for Zhumell dobs new [Re: petrus45]
      #6342956 - 01/29/14 12:05 PM

Why fret over a tiny gap under the focuser? My veiwing is at night and there isn't much light after the sun goes down to illuminate the focuser. Besides, the drawtube of the focuser isn't transparent, so stray light is baffled by the tube.
------
Dave


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kfiscus
Carpal Tunnel
*****

Reged: 07/09/12

Loc: Albert Lea, MN, USA
Re: Mega-mod thread for Zhumell dobs new [Re: David Castillo]
      #6393529 - 02/24/14 01:01 AM

Just to keep spiders out. I keep my scope in my unheated garage, sealed tight top and bottom to keep dust and critters out. Bottom cover is removed for mirror cooling and use.

Oh, yeah, this is a bump of my favorite thread, too.


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kfiscus
Carpal Tunnel
*****

Reged: 07/09/12

Loc: Albert Lea, MN, USA
Re: Mega-mod thread for Zhumell dobs new [Re: kfiscus]
      #6440578 - 03/31/14 10:43 PM

Bump. Several new threads about Zhumells.

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Dennis_S253
Pooh-Bah


Reged: 11/22/11

Loc: West Central Florida
Re: Mega-mod thread for Zhumell dobs new [Re: kfiscus]
      #6442468 - 04/01/14 09:47 PM

Wow I only got up to page 17 and this is great. More to learn. It's bed time though.

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Elroy
member


Reged: 11/22/13

Re: Mega-mod thread for Zhumell dobs new [Re: Dennis_S253]
      #6448140 - 04/04/14 10:00 PM

Addictive isn't it? I was leaning toward an 10", but after reading this I just couldn't help myself. And now after viewing M42 for the 1st time, I'm ready for my next step, Bob's knobs,new primary springs and more EPs and filters.

Edited by Elroy (04/04/14 10:02 PM)


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kfiscus
Carpal Tunnel
*****

Reged: 07/09/12

Loc: Albert Lea, MN, USA
Re: Mega-mod thread for Zhumell dobs new [Re: Elroy]
      #6476605 - 04/20/14 12:25 AM

Bump of the best thread.

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