Terabeam / Wegat ETX 125 OTA!
Posted 26 September 2012 - 11:11 AM
Been wanting to try one of these baby's for a while and just found one on ebay... Turns out Jim had one he was selling. I should have it in a couple of days!
This will serve a couple of functions - primarily as a planetary scope, but also I may use it as a guidescope as well.
I read some archived posts about these which piqued my interest - anyone here still have one? I'm also very interested in the awesome Terabeam mount/drive some of the folks have.
Posted 26 September 2012 - 11:48 AM
anyone here still have one? ...
Yes. An OTA. A Questar on steriods. Use for moon planets, mounted on a AT Voyager Alt-azm mount. BTW: if yours is coming without mounting rings, Scopestuff can help you figure that part out.
Interested in your impressions, after you get a chance to use it.
I think if Meade brought the complete 3 ETX Mak line back, as OTA's with the build quality of these, people would pay for it.
Posted 27 September 2012 - 07:45 AM
I am making some custom - it will be much cheaper.
Turns out, Schedule 40 Pipe comes in a 6" ID with approx .25 wall thickness. I have several sections being cut for me which I will then drill for both mounting holes and centering pins. In total, I think you can make a set of nice sturdy rings for about $20-$30 dollars. I'll report back when I have something.
Posted 02 October 2012 - 11:10 AM
Posted 13 October 2012 - 10:55 PM
Posted 15 October 2012 - 07:00 AM
I did make a set of rings out of 6" ID Schedule 40 steel. I drilles 1/4X20 holes (3 evenly spaced) in each ring and then use nylon /14X20 bolts to hold the scope. It works fine. I even attached a standard celestron finder and bracket to oe of the rings.
I'm actually going to go with production rings for a couple of reasons: 1) Weight - te steel rings I made are 2" wide and weight a ton. 2) I want a non- adjustable ring set - the nylon holds ok, but I really want a fully enclosed tube with felt all around it. I nearly lost the tube out the back of my rings one night while trying to center it to the finder... that was a potential disaster that I don't want to repeat.
and a side note.
** You will definately want to fully remove the rear cell and tighten the mirror retaining rings!!!!
Mine was flopping all over the place - I had to remove the rear cell and tighten it up and re-adjust the small springs that tension the mirror to the plate.
I have pics of the process, just have not had time to upload them...
Posted 17 October 2012 - 01:29 PM
I haven't tried to check the mirror retainer yet, but thanks for the heads up.
When you did get the scope out, how did it perform?
Posted 17 October 2012 - 02:49 PM
I have the scopestuff rings on the way - they are a bit over size so you just add extra felt.