Author Topic: Should I repair or replace a nexstar 114GT  (Read 422 times)

Tyler Fonseca

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Should I repair or replace a nexstar 114GT
« on: December 24, 2017, 04:06:56 AM »
Hello I am new to the cloudynights forums.  I have spent some time reading over different threads and have found it most helpful.  I use to be very much into astronomy once I was a child.  My Dad got me a bit Meade Comet seeker(model 277) extent once I was 7 or 8.  I have it and pulled it out of storage since I have gotten interested in astronomy again.  Still a great little scope.
A buddy of mine gave me a nexstar 114GT telescope which somebody had given him.  It had some issues but I managed to repair the issues with the computer and that part of the extent works great.  Also the mirror are in great shape as far as I can tell.

My primary issue is the extent needs collimating very badly and also the adjustment nobs on the back are gone.  In fact from taking a look at pictures even the screws which are in the telescope do not look those which should have come with it.  I have considered ordering parts for your own 114GT but I haven't found anything.  My only choice at this point is to attempt to find somebody selling a 114GT on ebay and buy it for parts.  That is looking like it will cost around $120 after shipping.

I am certain that Celestron sold the same tube onto a none computerized bracket.  Does anyone know what model that could be?  Also could I just order another 114mm tube of any manufacturer and replace the tube I am using?  Would other brands tubes work with the Nexstar gt Mount?
Finally even if I could get it to work am I wasting my money repairing this extent?  Can I just get a new one?



Lesego Dowdy

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Re: Should I repair or replace a nexstar 114GT
« Reply #1 on: December 24, 2017, 11:17:03 AM »
Can you take a picture of your mirror cell and download it here

scolposnimbworr

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Re: Should I repair or replace a nexstar 114GT
« Reply #2 on: December 30, 2017, 08:11:48 PM »
First, welcome to Cloudy Nights!

Can't help you with the 114 but just wanted to mention (in case you haven't searched and found this out for yourself) that your Meade 277 is very well regarded for that size of scope (as you have experienced). Too small to be your only scope but definitely don't ditch it if you get your 114 working!

Clear skies!

Pauly

Kenneth Brown

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Re: Should I repair or replace a nexstar 114GT
« Reply #3 on: January 04, 2018, 03:12:09 PM »
Quote
Hello I am new to the cloudynights forums. I have spent some time reading over different threads and have found it most helpful. I use to be very much into astronomy when I was a kid. My Dad got me a little Meade Comet seeker(model 277) scope when I was 7 or 8. I still have it and pulled it out of storage because I have gotten interested in astronomy again. Still a great little scope.
A friend of mine gave me a nexstar 114GT telescope that someone had given him. It had some problems but I was able to repair the problems with the computer and that part of the scope works perfect. Also the mirror are in great shape as far as I can tell.
My main issue is that the scope needs collimating very badly and the adjustment nobs on the back are gone. In fact from looking at pictures even the screws that are in the telescope don’t look the ones that should have come with it. I have considered ordering parts for the 114GT but I have not found anything. My only option at this point is to try and find someone selling a 114GT on ebay and buy it for parts. That is looking like it will cost around $120 after shipping.
I am sure that Celestron sold that same tube on a none computerized mount. Does anyone know what model that would be? Also could I just order another 114mm tube of any brand and replace the tube I am using? Would other brands tubes even work with the Nexstar gt Mount?
Lastly even if I can get it to work am I wasting my money repairing this scope? Should I just get a new one?

Welcome to the world of Amateur Telescope Making! How can we help?

trualolalun

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Re: Should I repair or replace a nexstar 114GT
« Reply #4 on: January 04, 2018, 05:24:58 PM »
Quote
Hello I am new to the cloudynights forums. I have spent some time reading over different threads and have found it most helpful. I use to be very much into astronomy when I was a kid. My Dad got me a little Meade Comet seeker(model 277) scope when I was 7 or 8. I still have it and pulled it out of storage because I have gotten interested in astronomy again. Still a great little scope.
A friend of mine gave me a nexstar 114GT telescope that someone had given him. It had some problems but I was able to repair the problems with the computer and that part of the scope works perfect. Also the mirror are in great shape as far as I can tell.
My main issue is that the scope needs collimating very badly and the adjustment nobs on the back are gone. In fact from looking at pictures even the screws that are in the telescope don’t look the ones that should have come with it. I have considered ordering parts for the 114GT but I have not found anything. My only option at this point is to try and find someone selling a 114GT on ebay and buy it for parts. That is looking like it will cost around $120 after shipping.
I am sure that Celestron sold that same tube on a none computerized mount. Does anyone know what model that would be? Also could I just order another 114mm tube of any brand and replace the tube I am using? Would other brands tubes even work with the Nexstar gt Mount?
Lastly even if I can get it to work am I wasting my money repairing this scope? Should I just get a new one?

I would repair the telescope, since the problem seems to be with the collimating screws, which could be a very easy fix even without Genuine Celestron Parts.

vieproltesro

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Re: Should I repair or replace a nexstar 114GT
« Reply #5 on: January 08, 2018, 05:59:40 AM »
Forrester,

Welcome to Cloudy Nights.

Some photos may help us understand the issue. If it is just screws it is likely we can help you find a source.

Do you have some kind of a collimation tool to help you judge the current state of collimation?

knucareaslo

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Re: Should I repair or replace a nexstar 114GT
« Reply #6 on: January 08, 2018, 07:02:01 PM »
I have the 114gt, It's a OK scope. Not bad for a computerized starter scope.
Buying another 114GT for parts is not needed.
The manual is available on line.
Collimation is not that hard,it is explained in the manual.There are online video's on how to collimate a telescope, it's the same for all scopes of this type. After collimation adjust the finder scope to the telescope on a fixed land object.
If there is a Astronomy Club in your area go to a meeting and ask for help.
You can call Celestron and ask them for the correct screws, talk to a experienced technical person, their normal help desk doesn't know much about the older scopes or try Bob's Knobs for the screwsyou need.
Also you may find the correct size screws at Lowes or home depot. If nothing else this will help you order the correct size screws. Bring the scope with you and check for the correct screw sizes. When checking for the correct screw sizes do not force anything. Another source of hardware is McMaster Carr, from them you will need to buy package quantity's. I am not sure if the 114GT used American or metric threads.
The original eyepieces for the scope were not that great, look into buying a couple of plossl eyepieces, they will greatly improve the performance of the scope.

Myron Apostolics

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Re: Should I repair or replace a nexstar 114GT
« Reply #7 on: January 10, 2018, 11:19:17 PM »
Quote
This is a picture I took of the accessorys I got with the scope. https://1drv.ms/i/s!...8rgzC5RuJT6sCyQ
I don't know much about the filters but I used the moon filter. Not sure what to think of it.

Skip buying any more eyepieces for now,those in the picture should do well enough
You should find suitable screws from Lowe's or hardware store.Probably are metric.If any of the original still there use as sample.

Roger Dixon

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Re: Should I repair or replace a nexstar 114GT
« Reply #8 on: January 11, 2018, 12:07:27 PM »
You certatinly have enough eyepieces and filters for now. No need to buy anymore.

Frky Sherman

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Re: Should I repair or replace a nexstar 114GT
« Reply #9 on: January 12, 2018, 03:52:37 AM »
Quote
Quote

This is a picture I took of the accessorys I got with the scope. https://1drv.ms/i/s!...8rgzC5RuJT6sCyQ
I don't know much about the filters but I used the moon filter. Not sure what to think of it.

Skip buying any more eyepieces for now,those in the picture should do well enough


Travis Vega

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Re: Should I repair or replace a nexstar 114GT
« Reply #10 on: January 13, 2018, 05:57:41 AM »
Do you have pictures of the telescope and the missing parts issue?

bamrocorna

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Re: Should I repair or replace a nexstar 114GT
« Reply #11 on: January 13, 2018, 09:13:13 PM »
Quote
Quote

Quote

This is a picture I took of the accessorys I got with the scope. https://1drv.ms/i/s!...8rgzC5RuJT6sCyQ
I don't know much about the filters but I used the moon filter. Not sure what to think of it.

Skip buying any more eyepieces for now,those in the picture should do well enough

Not sure what your saying with the little figure...now looking at his eyepiece set I see two Kellner type (SMA) in 10 and 25 mm,a 30mm plossl, a 16mm planetary style probably 66 degree, and an older orthoscopic 7mm,plus a 2x barlow quite usable with any of the eyepieces.Not a Huygens in the bunch!Plus the usual filters which many buy and few actually use.Nothing wrong with K/SMA and the 7mm ortho 40? degree FOV is fine for high power planet views.

He has effective focal lengths available, by use of the barlow with the eyepieces ,of 3.5,5,7,8,10,12.5,15,16,25,and 30mm and for a scope of 1000mm focal length thus magnifications from 33 to 285X which fully cover the range useful using a 4" scope.

I truly cannot see a NEED for different eyepieces in order to see things with that scope.

Carl Hanks

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Re: Should I repair or replace a nexstar 114GT
« Reply #12 on: January 14, 2018, 01:47:01 AM »
Welcome to CN remember that even if you cant fix the OTA the GT mount can handle lots of other OTA's , but just missing screws should be a simple fix , good luck

grountentaybrig

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Re: Should I repair or replace a nexstar 114GT
« Reply #13 on: January 14, 2018, 03:50:18 AM »
Quote
Quote

This is a picture I took of the accessorys I got with the scope. https://1drv.ms/i/s!...8rgzC5RuJT6sCyQ
I don't know much about the filters but I used the moon filter. Not sure what to think of it.

Skip buying any more eyepieces for now,those in the picture should do well enough

[/quote]
Not sure what your saying with the little figure...now looking at his eyepiece set I see two Kellner type (SMA) in 10 and 25 mm,a 30mm plossl, a 16mm planetary style probably 66 degree, and an older orthoscopic 7mm,plus a 2x barlow quite usable with any of the eyepieces.Not a Huygens in the bunch!Plus the usual filters which many buy and few actually use.Nothing wrong with K/SMA and the 7mm ortho 40? degree FOV is fine for high power planet views.

He has effective focal lengths available, by use of the barlow with the eyepieces ,of 3.5,5,7,8,10,12.5,15,16,25,and 30mm and for a scope of 1000mm focal length thus magnifications from 33 to 285X which fully cover the range useful using a 4" scope.

I truly cannot see a NEED for different eyepieces in order to see things with that scope.[/quote]
 

The eyepiece selection might be unimportant. From alleged pictures of this model, the focal length does not correspond to the length of the tube. I could of course be looking at the wrong picture.

belmadeasus

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Re: Should I repair or replace a nexstar 114GT
« Reply #14 on: January 17, 2018, 11:19:56 PM »
His scope is likely a Bird-Jones design 114 since that scope is popular with retailers(most product per inch of shelf space) and most well-meaning purchasers don't know much about scope designs.