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Alternative bases/riser for Telrad

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11 replies to this topic

#1 Brenden

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Posted 15 October 2021 - 09:41 PM

Hi everyone,

 

I have an ES truss dob and just purchased a telrad to install. Unfortunately the base is about 1 cm too long and doesn't fit between metal rings on the upper assembly. I have found the dove tail adapters on scope stuff, but they are pricey and I already have a RACI finder attached so I would rather find another option. Are there any alternative bases out there or even a riser that have a slightly smaller (less long) footprint? I love the quality of the telrad, but I suppose if I can't make it work then I will return it in exchange for a Rigel quick finder.

 

Thanks!



#2 Avgvstvs

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Posted 15 October 2021 - 09:50 PM

Its hard to tell from your description but can you put a small wooden block

between your metal rings? Then mount the telrad base on top of that?

It doesn't matter if it overhangs a bit on either side. But maybe it won't look so good?

I guess it all depends on what's important to you.



#3 kfiscus

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Posted 15 October 2021 - 09:52 PM

I'm not familiar with the ES scope.  How high are the rings that you need to clear?  My thought was attaching a wooden block to serve as a cheater/base for attachment of the Telrad base above the rings.

 

(Posted moments after the above similar suggestion made while typing.)


Edited by kfiscus, 15 October 2021 - 09:54 PM.

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#4 Brenden

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Posted 15 October 2021 - 10:08 PM

The rings are very low, maybe about 2mm. The tube is long enough, there's just not quite enough room between the two rings that go around it. Using a piece of wood is a good idea. I don't have access to a shop to cut something to size, but maybe I can find something else to use. The only issue I see is that it might not stay very well due to the curve of the tube (The telrad has two angled points of attachment).


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#5 kfiscus

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Posted 16 October 2021 - 01:13 PM

You could have someone cut a piece of aluminum U-channel.  Mounted 'upside-down', its 2 edges will keep things aligned.



#6 Mitchell M.

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Posted 16 October 2021 - 03:17 PM

How about mounting the telrad to the raci in such a way to utilize them together?



#7 BNesvold

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Posted 17 October 2021 - 06:52 PM

I had the same issue with the same scope. I trimmed off the bottom couple millimeters on one end of the telrad base until the it fit between the upper and lower rings on the UTA.
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#8 Jon Isaacs

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Posted 17 October 2021 - 08:07 PM

I had the same issue with the same scope. I trimmed off the bottom couple millimeters on one end of the telrad base until the it fit between the upper and lower rings on the UTA.

Hello and :welcome: to Cloudy Nights.. 

 

That sounds like the plan.. 

 

Jon



#9 Brenden

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Posted 19 October 2021 - 11:48 AM

I also thought about trimming it slightly, but am lacking in trimming tools. Perhaps I will look into this though. What did you use to trim it?



#10 cliff mygatt

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Posted 19 October 2021 - 01:52 PM

I have an ES 16 gen II dob and I use this bracket to mount both my Telrad and Stellervue 60 mm Finder scope and works well.  I have to adapt the bracket to ES.  I use this Telrad adapter from Scopestuff and this riser as well.  The finder is closest to the Focuser and forward in the mount and the Telrad is on a short riser and back in the mount.  Good luck!


Edited by cliff mygatt, 19 October 2021 - 01:58 PM.


#11 kfiscus

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Posted 19 October 2021 - 09:37 PM

I also thought about trimming it slightly, but am lacking in trimming tools. Perhaps I will look into this though. What did you use to trim it?

I would use a Dremel and a sanding drum with a light touch (and eye protection).



#12 BNesvold

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Posted 20 October 2021 - 07:13 AM

I also thought about trimming it slightly, but am lacking in trimming tools. Perhaps I will look into this though. What did you use to trim it?


I just used a hack saw. Mark the cuts and take it slow.


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