1187 replies to this topic

[dblstar]

Someone pocketed my Questar (3.5) eyepiece and adapter ring! I'm hoping someone has the adapter I have highlighted in a photo. Please let me know if you have one available . Thank you, Don

 

 

Edited by dblstar, 20 June 2024 - 10:04 AM.

[1939Dodge]

Looking for a link or hard copy of a Celestron PowerStar PEC manual.

thankyou!

[Sean Cunneen]

I am looking for a criterion 1" drive. I need the worm block, worm wheel and clutch for a 1" shaft. I will trade my Jeagers 1" drive straight up if you like! It's for a neat project....

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[deSitter]

Someone pocketed my Questar (3.5) eyepiece and adapter ring! I'm hoping someone has the adapter I have highlighted in a photo. Please let me know if you have one available . Thank you, Don

 

Screen Shot 2024-06-20 at 8.33.17 AM.jpeg

 

IMG_1092 (1).jpeg

Oh man! Well that seems like something a machinist could make with a decent lathe.

 

-drl

[deSitter]

I am looking for a criterion 1" drive. I need the worm block, worm wheel and clutch for a 1" shaft. I will trade my Jeagers 1" drive straight up if you like! It's for a neat project....

"Calling Dr. Brown! Dr. Sam Brown, please respond on the red phone..

 

It's the white phone for Edmund.

 

No, it's the red phone for Edmund. The white phone is for Unitron.

 

No, the red phone is for Unitron, the white phone is for Edmund.

 

Let's stop talking about the phones. I know you've been using a Criterion lately."

 

-drl

[98105dude]

Don - you mean pocketed, as in stole it from you?

Edited by 98105dude, 20 June 2024 - 09:08 PM.

[apfever]

I am looking for a criterion 1" drive. I need the worm block, worm wheel and clutch for a 1" shaft. I will trade my Jeagers 1" drive straight up if you like! It's for a neat project....

I have all that, or can use all that, Critter and Ed live here, Jeagers is friendly to Ed, have more Critter than Ed, could use more Jeagers, could use more.....cow bell.

[nykaver]

Looking for an old 0.965" eyepiece sun filter.  Yes, I know the risk.  I need it for the finder on my Questar.  Thanks.

[Defenderslideguitar]

Greetings    I have the nice  Pentax  75edhf    somehow  the extremely small screw that goes on the focuser  has slipped out in the driveway and is gone.  Now the focuser knobs work fine but only the little black tongue moves in and out but  the focuser does not...

 

Seems like small eyeglass screw size but who knows    any ideas?

Thanks in advance

Edited by Defenderslideguitar, 28 June 2024 - 06:59 PM.

[deSitter]

Greetings    I have the nice  Pentax  75edhf    somehow  the extremely small screw that goes on the focuser  has slipped out in the driveway and is gone.  Now the focuser knobs work fine but only the little black tongue moves in and out but  the focuser does not...

 

Seems like small eyeglass screw size but who knows    any ideas?

Thanks in advance

You mean this one?

 

-drl

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[Defenderslideguitar]

Thanks so much for the pic.   Yes  that is it. 

 

Have to find a substitute

Edited by Defenderslideguitar, 29 June 2024 - 08:49 PM.

[cavedweller]

Thanks so much for the pic.   Yes  that is it. 

 

Have to find a substitute

 

Is there one on the other end of the rack you can match it to?

[Marc-Andre]

Thanks so much for the pic.   Yes  that is it. 

 

Have to find a substitute

Could you gain access to a "roofer's magnet" to sweep the area. I use a wide magnet removed from an office copy machine years ago. Works good if I'm not looking in thick grass or the piece is imbedded in the surface.

Edited by Marc-Andre, 30 June 2024 - 12:27 PM.

[deSitter]

Could you gain access to a "roofer's magnet" to sweep the area. I use a wide magnet removed from an office copy machine years ago. Works good if I'm not looking in thick grass or the piece is imbedded in the surface.

Chances are it's a brass screw.

 

Those screws are of course very short so they don't protrude through the drawtube. But I'm sure a standard 2mm or 3mm screw will work. I would raid my old computer parts for a screw. Disk drives have lots of small screws.

 

-drl

[flyboyu777]

I decided to go on a whim and buy a potential basketcase, mainly for the mount and drive, but does anyone know or have a Celestron 8" secondary and corrector plate laying around you aren't using? 

 

 

https://www.ebay.com/itm/276531976151

 

 

I do have a late 70's Orange tube C-8 OTA in need of a mount.  I might use it on this mount if it proves to be functioning. . . .

[Eric Greene]

Looking for a finder mount for an orange tube C8 that will handle a 50mm finder.  If it comes with a working finder - so much the better!  

[Roger Belveal]

Hello all, I'm in the final stages of refurbishing an orange tube Celestron Comet Catcher and I am missing the dust cap that fits over the end of the scope where the corrector plate is. A 5.5in scope cover is hard to find so far... Thanks and clear skies!

[flyboyu777]

Anyone have a spare power cord for my newly acquired Celestron Byers C-8 mount?  It's a 3 pin socket . . . . . .

[Bill Griffith]

Looking for Vixen MD-5 or MD-6 controllers.  That are complete and thought to be operational.

 

Thanks!

Edited by Bill Griffith, 16 July 2024 - 08:22 PM.

[Phil Taylor]

Hi all, probably not great to ask for something on my first post, however I guess this is the serious start of my astronomy journey...

 

I have this week been gifted a Celestron Classic C8. According to the database it was built in 2nd quarter of 1974 - so it just had it's 50th birthday!

it needs a it of love after many years of no use.

 

I am looking for:

 

a) an original RA knob. I can assure you, trying to keep it manually rotating with just the clutch / lever to control it taught me a it of patience tonight :-)

b) I have no power cable or controller. I believe some use an inverter from 12V? Looking for recommendations here including the following information:

    Did Celestron Pacific make a 240VAC version or were they all 110V on the RA drive motors? 

 

I am in Melourne Australia, but work for a US / global company so if you're not happy to ship overseas I probably know someone near you..

 

Thanks for your help everyone! Keen to learn a lot from all of the experts here.

Regards, Phil T.

 

 

[spartan1]

Hi all, probably not great to ask for something on my first post, however I guess this is the serious start of my astronomy journey...

 

I have this week been gifted a Celestron Classic C8. According to the database it was built in 2nd quarter of 1974 - so it just had it's 50th birthday!

it needs a it of love after many years of no use.

 

I am looking for:

 

a) an original RA knob. I can assure you, trying to keep it manually rotating with just the clutch / lever to control it taught me a it of patience tonight :-)

b) I have no power cable or controller. I believe some use an inverter from 12V? Looking for recommendations here including the following information:

    Did Celestron Pacific make a 240VAC version or were they all 110V on the RA drive motors? 

 

I am in Melourne Australia, but work for a US / global company so if you're not happy to ship overseas I probably know someone near you..

 

Thanks for your help everyone! Keen to learn a lot from all of the experts here.

Regards, Phil T.

Hello from a fellow Ozzie,

 

I have been down this road on a 1979 orange C8.

 

If you have 110v motors in the base, they are probably synchronous motors, 60Hz and 1 rev per hour (RPH). They will either be clockwise rotation (CW) or counter clockwise (CCW) as they are different for Southern Hemisphere and Northern Hemisphere. So the first thing to do is take one motor out and check the markings on the side to see what you have. Power supply here in Oz is 240v 50Hz and although you can buy a cheap transformer and drop the voltage to 110v, it cannot change the frequency or the direction of rotation. Synchronous motors are only designed to go in one direction and require the correct frequency to operate.

 

Celestron did fit 240v synchronous motors as an option on the older C5 and C8's and occasionally they come up for sale on Ebay, etc. But beware as although they are identical in appearance, the C5 motors were 0.75 RPH due to different sized RA gears and so will not track at the correct speed if fitted to a C8. You will need Southern Hemisphere motors, 240v, 1RPH.  There is a market for the 110v motors in the USA, so you can always sell them there and recoup some money. Its best to post a pic of the motors and the power socket in the base. If they are not synchronous motors then you are looking at a different ball game.    

 

Philip

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[flyboyu777]

Anyone have a spare power cord for my newly acquired Celestron Byers C-8 mount?  It's a 3 pin socket . . . . . .

I found a source if anyone needs a cord-you will have to change the plug out though. . . . .

 

https://www.surpluss...lecCords-1.html

 

This is the one you need for the C-90, 5 or 8 classis A/C synchronous motor:  (WCC) 860172-B00

[flyboyu777]

Hello from a fellow Ozzie,

 

I have been down this road on a 1979 orange C8.

 

If you have 110v motors in the base, they are probably synchronous motors, 60Hz and 1 rev per hour (RPH). They will either be clockwise rotation (CW) or counter clockwise (CCW) as they are different for Southern Hemisphere and Northern Hemisphere. So the first thing to do is take one motor out and check the markings on the side to see what you have. Power supply here in Oz is 240v 50Hz and although you can buy a cheap transformer and drop the voltage to 110v, it cannot change the frequency or the direction of rotation. Synchronous motors are only designed to go in one direction and require the correct frequency to operate.

 

Celestron did fit 240v synchronous motors as an option on the older C5 and C8's and occasionally they come up for sale on Ebay, etc. But beware as although they are identical in appearance, the C5 motors were 0.75 RPH due to different sized RA gears and so will not track at the correct speed if fitted to a C8. You will need Southern Hemisphere motors, 240v, 1RPH.  There is a market for the 110v motors in the USA, so you can always sell them there and recoup some money. Its best to post a pic of the motors and the power socket in the base. If they are not synchronous motors then you are looking at a different ball game.    

 

Philip

Good post-I found out that the Byers drive Synchronous motor is 15 RPM.  They are hard to find, but eBay has them occasionally. . . .

[Mr Magoo]

I’m looking for a declination slow motion knob for my classic C8 fork mount.

[flyboyu777]

I found a source if anyone needs a cord-you will have to change the plug out though. . . . .

 

https://www.surpluss...lecCords-1.html

 

This is the one you need for the C-90, 5 or 8 classis A/C synchronous motor:  (WCC) 860172-B00

Classics, not classis