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C14 - work on one

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#1 MikeMS

MikeMS

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Posted 14 February 2013 - 03:07 AM

I offered to bring an unused C14 SCT back into use for the local university.
The main problem with it was some missing parts, mainly the power lead, handset and a finderscope.
I did try to convert it to meade autostar with the DS motors and adding a worm and wheel, but it was not that successful, so I went back to the original set up.
I have lowered the tripod to a sensible height and made a trolley for it. This may be less stable than the original, but you can move the scope now, and this is needed. I could not remove the spreader leg pins, hence the legs being held under the top of the tripod. And I have strong wire to stop the legs spreading when not in the trolley. The legs are broom stick handles, the chap in the shop seemed surprised when I purchased 6!!
The electrics did not work, I assume someone had plugged it into 220V instead of 110V. I got a new transformer from 220V to 2 X 12V and replaced, made a new handset. The top switch does the dec motor and the middle switch the RA with fast and slow (24V and 12V) speeds. The design of the tangent arm means for the same motor speed the RA worms moves very fast compared to the dec arm. So the third switch feeds the RA motor but you can connect a lower voltage to give yet a slower speed, this works well with 6V.
The existing RA motor that runs all the time to give sideral tracking is now on a 220V to 110V transformer, the larger black box on the extension lead. In testing it, I think it runs too fast, but as the scope will only be for visual use this may be acceptable.
I took it to the desert here in Riyadh and M42 was the best I have ever seen, and without perfect collimation. But other objects not so good, so I now see that poorer skies (there is always dust here) do not suite larger telescopes.
The other issue to solve is the secondary housing moves slightly on teh corrector plate. I removed the corrector plate ring but the glass is tightly fitted and I did not want to go further as this is not my telescope.
So it works to a degree and after 20 years (so I have been told) off no one using it, maybe it will have some use. I collected the finderscope and Bobs knobs from a visit to LA in December and I also got an orange tube C8 SCT OTA and I think I like this better, and it is mine. Here are some pictures.
Kind regards,
Mike.

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#2 MikeMS

MikeMS

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Posted 14 February 2013 - 03:08 AM

pic 2

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#3 MikeMS

MikeMS

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Posted 14 February 2013 - 03:11 AM

pic 3

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#4 MikeMS

MikeMS

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Posted 14 February 2013 - 03:12 AM

pic 4

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#5 Escher

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Posted 15 February 2013 - 08:44 AM

Nice work, I have aperture envy!

So, is this your scope now, or does it go back to the school?






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