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Thread: A Tasco 11TR fell into my lap..

  1. #11
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    Default Re: A Tasco 11TR fell into my lap..



    Quote Originally Posted by TheFatKitty View Post
    Well, I tried it on the EQ2 for a bit, and like most of these scopes, too much scope for the mount.

    I took the scope in the pic I posted above, and the mount was plenty sturdy for my 70's Sears 60mm f/11...
    Attachment 181372

    And the scope itself is so much more sturdy and usable as a dob, really. Some pine shelving, drain end caps for bearings, a record and furniture sliders, and bicycle brakes/pads for the feet. $20, maybe, plus your time.
    Attachment 181373

    C'mon, you know what you want to do.... telescope project......

    All the best,
    Mark
    Mark, your dob mount is really really nice. You are crafty!!

    And yeah... that EQ2 would be a step up from the smaller EQ mount that the my Sears 60mm has, and the frac's clamshell looks like it'll bolt right up!!

    Thank you Mark, thats a great idea you've given.

    But now I'm thinking of alt bearings. Checking out some nice bearings on the big-leg US-built stuff (teeter, obsession, new moon, dobstuff).

    https://stellafane.org/tm/dob/mount/altbearings.html

    Azimuth bearings are a bit more straightforward, perhaps.

    What did you use for azimuth bearings, is that good ol' teflon and formica that I see in your image?

    Have a good evening my friend,
    I
    Last edited by kanadalainen; 07-18-2018 at 04:39 AM.
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    Ian
    Scopes Orion XT10i f4.7 "Frosty", old Sears 6305 60mm f15 "Raquel"
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  3. #12
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    Default Re: A Tasco 11TR fell into my lap..

    Quote Originally Posted by kanadalainen View Post
    Mark, your dob mount is really really nice. You are crafty!!

    And yeah... that EQ2 would be a step up from the smaller EQ mount that the my Sears 60mm has, and the frac's clamshell looks like it'll bolt right up!!

    Thank you Mark, thats a great idea you've given.

    But now I'm thinking of alt bearings. Checking out some nice bearings on the big-leg US-built stuff (teeter, obsession, new moon, dobstuff).

    https://stellafane.org/tm/dob/mount/altbearings.html

    Azimuth bearings are a bit more straightforward, perhaps.

    What did you use for azimuth bearings, is that good ol' teflon and formica that I see in your image?

    Have a good evening my friend,
    I
    Hi Ian, sorry for the late reply; I was just done last night. It was even clear out and I just couldn't do it.

    In answer to your question, I actually used an old 33 RPM record, and 3 furniture sliders. $0.50 for the record at Goodwill, and two bucks for a huge pack of furniture sliders at the dollar store next door to Goodwill. Ten minutes of shopping; under three bucks spent. Just the way it should always be.

    So this is the result. Works great, no binding, and the tightness (or looseness) can be adjusted with the center bolt.
    Base_1.jpg

    As for feet, 3 pieces of flat bar, and brake shoes from an old ten speed.
    Base_3.jpg

    Before you begin anything though, I recommend a full cat scan!
    Cat_Scan.jpg

    After I built the scope, I discovered my idea was most certainly not original, and had been done better

    Must go, gotta eat.
    Have a good night, buddy!

    Ton ami,
    Mark

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    10" Dob, SLT102, C80-HD, Vixen-made C80
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    1961 Tasco 12TE 60mm, 1969 11TE-5 4.5". And a Canon T3 (1100D)

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    Default Re: A Tasco 11TR fell into my lap..

    Quote Originally Posted by TheFatKitty View Post
    Hi Ian, sorry for the late reply; I was just done last night. It was even clear out and I just couldn't do it.

    In answer to your question, I actually used an old 33 RPM record, and 3 furniture sliders. $0.50 for the record at Goodwill, and two bucks for a huge pack of furniture sliders at the dollar store next door to Goodwill. Ten minutes of shopping; under three bucks spent. Just the way it should always be.

    So this is the result. Works great, no binding, and the tightness (or looseness) can be adjusted with the center bolt.
    Base_1.jpg

    As for feet, 3 pieces of flat bar, and brake shoes from an old ten speed.
    Base_3.jpg

    Before you begin anything though, I recommend a full cat scan!
    Cat_Scan.jpg

    After I built the scope, I discovered my idea was most certainly not original, and had been done better

    Must go, gotta eat.
    Have a good night, buddy!

    Ton ami,
    Mark
    Brilliant, Mark!

    I have two cats (Maser and Booster) to supply the scanning.

    Salut
    I
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    Default Re: A Tasco 11TR fell into my lap..

    Quote Originally Posted by kanadalainen View Post
    Brilliant, Mark!

    I have two cats (Maser and Booster) to supply the scanning.

    Salut
    I
    Don't forget to bring in the dog afterward for the lab report.
    Bryan
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    Default Re: A Tasco 11TR fell into my lap..

    Once you get completed Cat scan's and Lab Reports you will be totally good to go. Nice work on that scope....
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    Default Re: A Tasco 11TR fell into my lap..

    Quote Originally Posted by bladekeeper View Post
    Don't forget to bring in the dog afterward for the lab report.
    Amy's report: ...at that point we aligned the primary with the tube, and set about finding... FOOD?! I"M HUNGRY!!! AND HAPPY!! HEY, LETS GO FOR A WALK!!! <<wag wag wag wag>>

    Quote Originally Posted by dagadget View Post
    Once you get completed Cat scan's and Lab Reports you will be totally good to go. Nice work on that scope....
    I'll get back to you after a couple of days and a kilo of kibble treats.
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    Default Re: A Tasco 11TR fell into my lap..

    Really nice acquisition Ian!

    If I came across a Tasco 114/900mm Newt made in Japan for < $75, I'd quickly snap it up.
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    ------------------------------------------------------------------------------------------------------------------------------------------------------------
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    Default Re: A Tasco 11TR fell into my lap..

    I am adding to this thread, as I have had some time (translation: plenty of clouds) to look into it.

    Optical Tube Repair

    The tube was heavily bashed and dented. So I found my old metal bumping stuff ( a good hand-held dolly that is rounded is essential for tubes or compound curved metal).



    Many hundreds of taps later, I had the tube essentially straight.




    Next,

    Modifying the optical tube to accept a 1.25" focuser

    I next need to set about modifying the tube, to accept a vintage Meade focuser.



    I had this in my pile of parts. Its a decent focuser, from an unknown donor - and its Made in Japan. I cleaned it and found that the draw tube insert needed to be bored out a little.

    (To be continued).

    Ian
    Ian
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    Default Re: A Tasco 11TR fell into my lap..

    Modifying the optical tube to accept a 1.25" focuser

    I didn't want to use a metal nibbler or tin snips, IMHO too much of the blacksmith/caveman approach - so I dug out a tungsten steel burr and slipped that into my drill yoke to do some low-speed concentric enlargement of the draw tube opening.




    Et voila, after about 30 minutes of grinding and then low speed polishing with a mini-flap wheel, the draw tube opening was expanded and fitted for the Meade focuser:



    To be continued...
    Ian
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    Default Re: A Tasco 11TR fell into my lap..

    A test fit of the 1.25" Meade focuser:




    Seems to fit nicely!

    Now, I need to

    i) drill holes for the mounting screws and leave some play so that I can collimate the base of the focuser.
    ii) test out the back focus. The stock focuser body is about 30 mm shorter than the Meade. This might get tricky and I many need to make a "low profile" version of the focuser by cutting it down (More butchery) OR I can move the primary mirror up the tube by a similar amount.

    Q: Any feedback on this issue (if it rears its head)? What would you do?

    Painting the optical tube is next....

    To be continued....


    Ian
    Ian
    Scopes Orion XT10i f4.7 "Frosty", old Sears 6305 60mm f15 "Raquel"
    Binoculars Asahi Pentax 7x35 and 7x50, Beck Kassel 8x30 and Celestron 15x70
    Eyepieces: Leitz Periplan GF, ES68s, ES82s, TV Naglers, Meade 4000 super plossl, Nikon CFI, Olympus FK, Paracorr I, Abbe Orthos: Carl Zeiss Jena K7x (35mm), K10x (25mm)
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