Dob mount for my Meade 10" SN

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StarBru
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Dob mount for my Meade 10" SN

#1

Post by StarBru » Sun Jan 12, 2020 6:58 am

I was planning to eventually build a Dobson mount for my Meade 10" Schmidt Newtonian. I had already put my design on paper and bought some nice birch plywood for the build but that's as far as I got.

Recently I saw an advertisement in the classifieds on Cloudy Nights for a SkyQuest Dobson mount. It was missing the side bearings and their CorrecTension Friction Optimization System which applies additional friction onto the altitude bearing pads. As I understand it, the system uses a spring coil and helps with insufficient friction and balancing when changing eyepieces, etc.

I decided to buy it and received it a few days later. I bought two 4-inch PVC pipe caps that had a 5 inch outer diameter, drilled holes in the center and connected them to each side of one of the tube rings from my EQ mount. The ring is surrounded on each side by my home-built Wilson Rings so I can rotate the tube if needed for best eyepiece position. The altitude friction is good. The azimuth friction is too stiff but luckily I have some extra Teflon pads I can use for that! If you click on the photo it will show the correct orientation.
20200111_154506.jpg
Bruce
SCOPES: Currently two Meade 10" f/4 Schmidt Newtonians, Meade AR5 f/9.3 and AS80mm f/5 Refractors, Jason and Meade 60mm f/11.7 Refractors, Meade 2045D 4" f/10 SCT, Galileo 120mm f/8.3 Reflector.
ATM Projects: Home-built 8" f/2.9 Reflector, 65mm f/10 reflector, Binocular Sky-Scanner, some Dob mounts, and everything else!
MOUNTS/TRIPODS: Meade LXD-55 Go-To, Galileo Tri-Pier Alt/AZ, JMI Megapod, two 60mm EQ mounts
BINOS: Celestron 20x80 & Tasco 10x50
1.25" EP's/Barlows: Meade 26mm Super-Plossl & two 14mm UWA 4000 Series, one smoothie and one with eyecup, BCO 18mm, Agena 27mm Starguider & BST 16mm flat field, Orion 9mm Expanse & 50mm plossl, Televue 4mm Radian, Televue 2.5x Barlow, Meade #140 triplet 2x barlow, No-name 2x Barlow
COMA CORRECTOR: Televue Paracorr 1
CCD: Revolution Imager R2 that I am currently not using with lots of accessories
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yobbo89
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TSS Photo of the Day

#2

Post by yobbo89 » Sun Jan 12, 2020 7:32 am

very nice, i had to google what a schmidt newt was . it's got me interested , i guess i'll do some reading. how are the views ?
scopes :gso/bintel f4 12"trust tube, bresser messier ar127s /skywatcher 10'' dob,meade 12'' f10 lx200 sct
cameras : asi 1600mm-c/asi1600mm-c,asi120mc,prostar lp guidecam, nikkon d60, sony a7,asi 290 mm
mounts : eq6 pro/eq8/ (upcoming : mesu 200 v2)
filters : 2'' astronomik lp/badder lrgb h-a,sII,oIII,h-b,Baader Solar Continuum, Thousand Oaks Solar Filter.
extras : skywatcher f4 aplanatic cc, Baader MPCC MKIII Coma Corrector,Orion Field Flattener,zwo 1.25''adc.starlight maxi 2" 9x filter wheel
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StarBru
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#3

Post by StarBru » Sun Jan 12, 2020 8:25 am

It's a 10 inch f/4 scope but the front corrector does its job so that a coma corrector really isn't needed, although I am sure a coma corrector would help for younger eyes. I really don't notice the difference with a Paracorr 1.

Its a heavy OTA at 30 pounds and the LXD55 EQ mount it came with is only rated at 30 pounds. It worked visually but I noticed that same mount worked a lot better with a 15 pound refractor! So a new $1500+ EQ mount that can handle it's weight is not in the cards at this time. That's why I wanted to start using it with a Dobson mount. I predict I will use it more now.

I really love the wide field views. Its great for deep sky which is what I am mainly interested in. I have yet to take it to a dark sky site and I am looking forward to that!
Last edited by StarBru on Sun Jan 12, 2020 8:43 am, edited 1 time in total.
Bruce
SCOPES: Currently two Meade 10" f/4 Schmidt Newtonians, Meade AR5 f/9.3 and AS80mm f/5 Refractors, Jason and Meade 60mm f/11.7 Refractors, Meade 2045D 4" f/10 SCT, Galileo 120mm f/8.3 Reflector.
ATM Projects: Home-built 8" f/2.9 Reflector, 65mm f/10 reflector, Binocular Sky-Scanner, some Dob mounts, and everything else!
MOUNTS/TRIPODS: Meade LXD-55 Go-To, Galileo Tri-Pier Alt/AZ, JMI Megapod, two 60mm EQ mounts
BINOS: Celestron 20x80 & Tasco 10x50
1.25" EP's/Barlows: Meade 26mm Super-Plossl & two 14mm UWA 4000 Series, one smoothie and one with eyecup, BCO 18mm, Agena 27mm Starguider & BST 16mm flat field, Orion 9mm Expanse & 50mm plossl, Televue 4mm Radian, Televue 2.5x Barlow, Meade #140 triplet 2x barlow, No-name 2x Barlow
COMA CORRECTOR: Televue Paracorr 1
CCD: Revolution Imager R2 that I am currently not using with lots of accessories
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#4

Post by StarBru » Sun Jan 12, 2020 8:42 am

Here you can see the front corrector plate and it's equatorial mount:
10SN 3.jpg
Bruce
SCOPES: Currently two Meade 10" f/4 Schmidt Newtonians, Meade AR5 f/9.3 and AS80mm f/5 Refractors, Jason and Meade 60mm f/11.7 Refractors, Meade 2045D 4" f/10 SCT, Galileo 120mm f/8.3 Reflector.
ATM Projects: Home-built 8" f/2.9 Reflector, 65mm f/10 reflector, Binocular Sky-Scanner, some Dob mounts, and everything else!
MOUNTS/TRIPODS: Meade LXD-55 Go-To, Galileo Tri-Pier Alt/AZ, JMI Megapod, two 60mm EQ mounts
BINOS: Celestron 20x80 & Tasco 10x50
1.25" EP's/Barlows: Meade 26mm Super-Plossl & two 14mm UWA 4000 Series, one smoothie and one with eyecup, BCO 18mm, Agena 27mm Starguider & BST 16mm flat field, Orion 9mm Expanse & 50mm plossl, Televue 4mm Radian, Televue 2.5x Barlow, Meade #140 triplet 2x barlow, No-name 2x Barlow
COMA CORRECTOR: Televue Paracorr 1
CCD: Revolution Imager R2 that I am currently not using with lots of accessories
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#5

Post by Lady Fraktor » Sun Jan 12, 2020 8:49 am

A nice telescope Bruce, you do not see a lot of these anymore.
With a 2.7° FOV it should make a nice DSO telescope.
Proper Telescopes: Antares 105 f/15, Celestron 150 f/8, Stellarvue NHNGDX 80 f/6.9, TAL 100RS f/10, TS 102 f/11, UR 70 f/10, Vixen ED115s f/7.7
Mounts: Celestron AS-GT, Celestron CG-5 w/ Argo Navis & tracking motor, SLT w/ pier & tripod mods, Manfrotto 028b w/ SV M2C, Mantrotto 055Pro w/ 128RC, TAL MT1C, Vixen SXP w/ HAL-130 & half pier
Diagonal: 2" A-P Maxbright, 2" Baader Herschel Wedge (P), 2" Zeiss/ Baader Amici Prism (DX2), 2" Orion Amici Prism, 2" Stellarvue DX, 2" TeleVue EverBrite
Eyepieces: Antares to Zeiss
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