Vixen A80M Coronado PST Phase 2 Mod... done! (finally)

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andreahaku
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Vixen A80M Coronado PST Phase 2 Mod... done! (finally)

Post by andreahaku » Mon Feb 27, 2012 2:35 pm

Hi everyone,

finally today I got the Crayfor SC focuser and I can go with phase 2 PST Mod on the Vixen A80M.

I already tested it briefly... now I'm processing the images. They won't be great as we had a sunny but very windy day. It seems that my "first light" has to be done with the wind :D

Anyway... here are a few pictures of my Frankenscope







Isn't "she" (it's a "Vixen") lovely? :D

I'll post first captures later, after processing.

Andrea

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Re: Vixen A80M Coronado PST Phase 2 Mod... done! (finally)

Post by Merlin66 » Mon Feb 27, 2012 3:10 pm

Well done!
Looking good....
The Stage 2 mod results even with a BF5 are always better than Stage 1!!!!
(The next thing you need for aesthetics to to make a tube adaptor between the SCT focuser and the end of the OTA - a lever clamped on the PST adjusting ring and a slot in the tube would give that "streamlined, professional" look)
Just my 0.02euro
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Re: Vixen A80M Coronado PST Phase 2 Mod... done! (finally)

Post by swisswalter » Mon Feb 27, 2012 4:03 pm

Hi Andrea

she looks great. Congrats on the mod. I'm interested too in the first pics you have been able to capture
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Re: Vixen A80M Coronado PST Phase 2 Mod... done! (finally)

Post by marktownley » Mon Feb 27, 2012 4:39 pm

Looks good Andrea! I take it's pretty easy to unscrew the etalong assembly from the black box of the PST?
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Re: Vixen A80M Coronado PST Phase 2 Mod... done! (finally)

Post by andreahaku » Mon Feb 27, 2012 4:47 pm

It took me days to do it. It's been the hardest thing to unscrew in my whole life!
But once done you feel like Superman... with a cryptonite piece in his hand :D

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Re: Vixen A80M Coronado PST Phase 2 Mod... done! (finally)

Post by Merlin66 » Mon Feb 27, 2012 4:48 pm

The original "ol' gold" PST etalon were relatively easy to remove; the first couple of batches from the Mexican assembly plant were overloaded with loctite and are VERY difficult to separate..the latest PST's don't seem to be as bad....
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Re: Vixen A80M Coronado PST Phase 2 Mod... done! (finally)

Post by andreahaku » Mon Feb 27, 2012 4:50 pm

Mine is very very old... I think one of the first (serial 94052) and it's been very very hard to do. Particularly the Etalon.

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Re: Vixen A80M Coronado PST Phase 2 Mod... done! (finally)

Post by marktownley » Mon Feb 27, 2012 6:02 pm

Is the etalon unscrewed from the black box using the boa constrictor / rubber strap tool then if it's a toughy to get out?
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Re: Vixen A80M Coronado PST Phase 2 Mod... done! (finally)

Post by andreahaku » Mon Feb 27, 2012 6:08 pm

I didn't use it but more brutal methods. But I think that with the rubber strap it wouldn't unscrew.
Just my opinion. But probably it was because mine is a very old one.

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Re: Vixen A80M Coronado PST Phase 2 Mod... done! (finally)

Post by Merlin66 » Mon Feb 27, 2012 6:20 pm

OK.
I haven't found an PST etalon yet that would not unscrew using two industrial strength BOA wrenches.....
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.yahoo.com/neo/groups/ast ... scopy/info
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer

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Re: Vixen A80M Coronado PST Phase 2 Mod... done! (finally)

Post by andreahaku » Mon Feb 27, 2012 6:44 pm

I'm sure about it :) It was quite easy to unscrew the gold tube, the BF, etc. only the etalon was very very difficult but I think it was just mine :D

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