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Equipment Discussions >> Classic Telescopes

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Masvingo
scholastic sledgehammer
*****

Reged: 01/10/12

Loc: Ayrshire, Scotland
Re: Celestron C8 Registry new [Re: Bill Griffith]
      #5615120 - 01/10/13 09:38 AM

Thanks Bill. I see what you mean, many happy returns.

I'm sorry to hear about #31's optics, I wish her a speedy recovery.

James


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starman876
Postmaster
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Reged: 04/28/08

Loc: VA
Re: Celestron C8 Registry new [Re: Masvingo]
      #5615286 - 01/10/13 11:15 AM

Yes, on other side the watefall flips. I might relax the secondary screws and readjust and see what happens.

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DAVIDG
Post Laureate
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Reged: 12/02/04

Loc: Hockessin, De
Re: Celestron C8 Registry new [Re: starman876]
      #5615334 - 01/10/13 11:40 AM

Quote:

I have a orange C8 from the early 80's that I was using last night. With the scope collimated and defocused on a bright star I see very nice rings. However, it almost looks like a very thin waterfall slooping down towards the center on one side. Is this an indication the secondary screws are to tight? I have never seen this before in any orange C8 I have had and I have had a few.




What your seeing is warm air coming out the top of the baffle tube.

- Dave


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starman876
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Reged: 04/28/08

Loc: VA
Re: Celestron C8 Registry new [Re: DAVIDG]
      #5615490 - 01/10/13 01:01 PM

Thanks Dave. did not even think of that. I did let it cool down to see if it was related , but when I got back out the corrector had dewed over. i will try it again inside with my artificial star and see if I get the same results.

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actionhac
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Reged: 08/09/08

Loc: Seattle
Re: Celestron C8 Registry new [Re: starman876]
      #5615532 - 01/10/13 01:23 PM

Hi James.

I was looking over my file and found a few things that may or may not be useful:

#338125
Motor date 6-75
Sandcast fork/mount, sandcast wedge and sandcast tripod.
I no longer own this scope, sold it a few years ago. I wish I hadn't but I did. I have no record of the buyer.

#22908
Motor date 10-77
Diecast fork/mount, diecast wedge and diecast tripod only, NO OTA.
I still own.

Robert


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Masvingo
scholastic sledgehammer
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Reged: 01/10/12

Loc: Ayrshire, Scotland
Re: Celestron C8 Registry new [Re: actionhac]
      #5621269 - 01/13/13 05:20 PM

Hi Robert

Thanks for additional info (apologies for the delay in responding, we have our sons visiting for a few days and I've also just picked up a 1981 orange tube C5 so have been a bit distracted).

Your mount serial no. of 22908 is interesting - is it Celestron Pacific or International? It doesn't seem to fit with either the date format of the 8xxxxx format - do you know if it was bought new as a mount only?

James


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actionhac
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Reged: 08/09/08

Loc: Seattle
Re: Celestron C8 Registry new [Re: Masvingo]
      #5621385 - 01/13/13 06:22 PM Attachment (23 downloads)

Hi James.
The seller kept the optical tube and mounted it on a GEM. The serial is correct #22908. I thought I'd better recheck just in case. And the motors are 10-77. It is fitted with Roger Tuthill accessories.
If Mr. Tuthill bought the telescopes from Celestron, added his custom parts and sold them, would this explain what you are finding with this serial number?


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Masvingo
scholastic sledgehammer
*****

Reged: 01/10/12

Loc: Ayrshire, Scotland
Re: Celestron C8 Registry new [Re: actionhac]
      #5622881 - 01/14/13 03:27 PM

Hi Robert

I'm not sure what to make of that number, it has the appearance of being in the date format, especially with the last number being slightly apart from the others but would suggest a date of the 2nd quarter of 1978? I had assumed that by then they had changed to the 8xxxxx style numbers and also that it would have been a Celestron International label - I'm not sure when the change from Pacific to International occurred but the C5/C8 manual on Robert Provin's site has a date of Jan 1978 and is a Celestron International publication.

Having said that, I know of two C5 date style serial numbers which are from the first quarter of 1978, one (#135858) is apparently Celestron Pacific according to the Astromart ad whilst the other (#136588), with 11/77 motors from a CN posting has a Celestron International dust cap for the corrector although the SN label looks to be Celestron Pacific - I can't quite make it out.

So it looks as though the date formats ran on into 1978' possibly for two quarters. As they were already up to #391207 by the third quarter 1977 did they start round again at 1 when they got to 9999 (hence the 208 in your number although I would have expected that they might have produced more by the 2nd quarter)? Or did they use a separate sequence for 'scopes produced for certain retailers like Tuthill? There are instances of unusual SNs appearing on 'special' C8s, eg Larry's sandcast C8 reputed to be built for Leo Henzl, Celestron Marketing VP and another C8 that was handpicked for a dealer in 1979 but had SN 909961.

Any one got any other thoughts? Any other 1978 models with the older date format SNs out there?

James


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bob midiri
Carpal Tunnel
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Reged: 06/17/04

Loc: pa 19320
Re: Celestron C8 Registry new [Re: Masvingo]
      #5623030 - 01/14/13 04:36 PM Attachment (25 downloads)

James I'll add my just purchased C8 plus here. #819750. Thanks Bob

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bob midiri
Carpal Tunnel
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Reged: 06/17/04

Loc: pa 19320
Re: Celestron C8 Registry new [Re: bob midiri]
      #5623037 - 01/14/13 04:38 PM Attachment (22 downloads)

And a picture of OTA and drive base

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Masvingo
scholastic sledgehammer
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Reged: 01/10/12

Loc: Ayrshire, Scotland
Re: Celestron C8 Registry new [Re: bob midiri]
      #5623041 - 01/14/13 04:42 PM

Thanks Bob.

James


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desertrefugee
Carpal Tunnel
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Reged: 08/06/07

Loc: Arizona
Re: Celestron C8 Registry new [Re: Masvingo]
      #5623216 - 01/14/13 06:46 PM Attachment (21 downloads)

Guess I might as well register my recently-acquired Orange Tube. Although produced later in the run, it still has the round base/dual spur drive.

(By the way, it's a pretty danged good performer. I've had it out several times. Precisely collimated, it renders ole Jove in fine detail. It also tracks quite well).

S/N 807397
Motors appear dated February 1980:


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kansas skies
sage


Reged: 12/02/12

Loc: Kansas, USA
Re: Celestron C8 Registry new [Re: Masvingo]
      #5623905 - 01/15/13 07:25 AM

James,

My orange C8 has the same Celestron Pacific label and serial number arrangement as shown in actionhac's picture. The serial number of mine is "31xx 8". I might add that the drive base does contain a full serial number, but I tend to be a little paranoid about publishing details that are too specific. Still, this should be enough information with which to build a database. Notice the space between the four digit serial number and the "8". The motors on mine are also dated 10-77.

I have what I assume is the original "Celestron International" warranty card and a "Celestron International" catalog that are both dated 10/77. From this, I would assume that the switch to Celestron International probably occurred in October of 1977 and that the printed material was released at the same time.

It's possible that this odd arrangement of serial numbers was transitional and employed in the process of using up existing inventory. I read somewhere that the lone 8 to the right of the serial number indicated 1978, which I thought was a fair assumption.

I ran across a picture of a Celestron C22 somewhere on the internet showing a similar label with a four digit serial number followed by a space and then the number 72, which probably refers to a date of 1972. This would indicate that Celestron used this serial number format at an earlier time.

Bill


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Masvingo
scholastic sledgehammer
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Reged: 01/10/12

Loc: Ayrshire, Scotland
Re: Celestron C8 Registry new [Re: kansas skies]
      #5625606 - 01/16/13 03:17 AM

Bill

Thanks for that, another piece in the jigsaw, just not sure where to put it! I guess a 31xx 8 SN destroys my idea that the date style numbers ran on into the 2nd quarter of 1978! (Although it still looks like C5 Date style SNs ran on into the 1st quarter of 1978) Looks like both your number and Robert's 22xx 8 SN signify something different by the first digit but what?

Ah well, back to the drawing board!

James

Edited by Masvingo (01/16/13 03:21 AM)


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kansas skies
sage


Reged: 12/02/12

Loc: Kansas, USA
Re: Celestron C8 Registry new [Re: Masvingo]
      #5625727 - 01/16/13 07:40 AM

James,

I was reading over what I wrote here and thought I might need to clarify a couple of things. The warranty card that I mentioned is more of a stock warranty certificate and 10-77 was the printing date. There is nothing hand-written on the card to indicate when the certificate was issued. As for the catalog, the 10-77 date is both the printing date and apparently the effective date. The significance here is just to indicate that the Celestron company was referring to itself as "Celestron International" by October of 1977. I might add that I purchased my C8 a couple of years ago and this printed material was included in the purchase, so I would have to assume that if this printed material is original to my C8 (which I believe it was), that my C8 was sold during or after October of 1977. Still, it has the Celestron Pacific label, so one would be lead to believe that they either didn't have Celestron International labels made up yet, or they were using up existing inventory.

As for the odd serial number, I had assumed that the lone "8" signified the year of manufacture, but it could just as easily signify that the serial number was assigned to a C8. Investigation into how Celestron was assigning serial numbers to other models during this period might clarify this. And, if the "8" signifies the model, then my C8 might have been manufactured prior to October of 1977 and sold later.

Bill


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Masvingo
scholastic sledgehammer
*****

Reged: 01/10/12

Loc: Ayrshire, Scotland
Re: Celestron C8 Registry new [Re: kansas skies]
      #5626701 - 01/16/13 06:03 PM

Bill

The two C5 SN's in a date style format that show a production date in the 1st quarter of 1978 both appear to have Celestron Pacific SN plates on the base so it does look as though they were using up old inventory after the name change. One of the C5s is stated to have a Celestron International cover for the corrector although this could have been added later.

The gap before the 8 in your number is suggestive of a year indicator and if produced early in 1978 having 10/77 dated motors is not inconsistent as 'just in time' inventory control was probably not common then.

Going by the C5 numbers it would seem that it may just be coincidence that the change in number format occurred around the time of the change in name but it would be nice to have a definite date for the change. It would also be nice to have some more SNs from late 1977 and early 1978 to see if some of the mists might part.

James

Edited by Masvingo (01/16/13 06:04 PM)


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kansas skies
sage


Reged: 12/02/12

Loc: Kansas, USA
Re: Celestron C8 Registry new [Re: Masvingo]
      #5626876 - 01/16/13 07:51 PM

James

I guess the 10-77 date on the motors would have to make that the earliest manufacture date of my C8. I find this all very interesting and wish you luck in your investigation. I look forward to seeing how it all unfolds.

Bill


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starman876
Postmaster
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Reged: 04/28/08

Loc: VA
Re: Celestron C8 Registry new [Re: kansas skies]
      #5627033 - 01/16/13 09:15 PM

My C8 is serial #816349
both motors are dated 6-10-80


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Rick Huber
sage
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Reged: 01/03/04

Loc: South of Cincy Ohio
Re: Celestron C8 Registry new [Re: starman876]
      #5627594 - 01/17/13 08:26 AM

Keep in mind everyone that motor dates are not necessarily OTA dates - They purchased motors in lot sizes so motor manufacturing dates could easily predate actual scope build dates..

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actionhac
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Reged: 08/09/08

Loc: Seattle
Re: Celestron C8 Registry new [Re: Rick Huber]
      #5627923 - 01/17/13 11:45 AM

Something I thought is interesting is a Classic 8 I own.
Celestron made this model starting in 1989 or 1990.
The serial number is 851144, the motor date is 1-83, 1983!
By 1990 Celestron had gone away from 110VAC drives and obviously were using old stock for the basic Classic 8 model. I'm assuming this is what took place. And the Classic 8 uses only 1 motor, with spur gear drive.
I know its the original motor because the previous owner had never plugged it in!

Robert


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