Hey Harold - Yup - that's just it - I've got the bearings as far forward (if you mean toward the eyepiece) as I can get them. When I said "as far back" as I ...
I have the 17.5 F5 Split tube PDHQ, and I love it! No balancing issues and I added accessories to it. The split tube for the most part doesn't present me with...
I have the 12.5" F/5 truss Discovery. I've added a Feather touch focuser, Argo Navis, dew guard system, fan, balance weights and a 12v 7 amp battery to run...
Hello folks, I have noticed a few have some balance issues with their scope, which I also have on my homebrew dob. In the Kriege book on building a truss...
... HEY TONY! Is that you? Have you joined this Forum? I hope you have...it's a kick! (I just joined this month) Everybody owns Discovery scopes here! HAL...
I used a chain for a number of years but then switched to a sliding rail system from scopestuff.com. I found, for me, that the type of system you use is...
... HEY MAUREEN: The TV Ethos is a fine ocular...I've looked through one! However, I still enjoy the 82 deg. FOV in my Naglers, and would buy another one...
Thanks for the tip, Jeff - I'm going to have to experiment with that. I have that book. It just didn't connect for some reason. Dave Grosvold Diamond Bar G...
Hi Hal, I have the 8mm & 13mm Ethos so I am a fan but right now the cost/benefit ratio is an important factor. I just don't think I will use it enough to...
Hello all, Re the poll: a 12.5" Truss-tube. Easy up, easy down, solid performer. Only complaint at all would be the (not entirely minor) collimation...
... HEY MARC: I had the same problem with my 20" Obsession when I owned it back in 2000. It would slip collimation 2 or 3 times a night when I went from near...
It's disappointing to hear you, too, experienced collimation going out of whack and only found resolution by turning to a solid tube assembly. I was hoping...
About 4-5 years ago Don Penske(?) (Starman1 on CN) suggested replacing the small washers under the screws that hold the spider with fender washers. I tried it...
Hi Marc, One big problem I have had with my Discovery 17.5" truss DOB is the constant need for re-collimation several times during an observing night. The...
Thanks to all who responded with suggestions for correcting collimation slop. I will give a few of the recommendations a try. I'd done a search some time ago...
... Yes, Maureen...the fender washers allow you to place more tension on the spider vanes by allowing that tension to be distributed over the wider area...
I used fender washers too, when I first got the scope (15" TD), but finally built a new upper cage assembly, shaving off two pounds and greatly increasing...
Marc, Don is extremely knowledgeable and helpful. He also own a 12.5" Discovery truss scope. I haven't seen him post on here in a very long time but you could...
HELLO! I visited Discovery's manufacturing facility today to see if the three 15" Split-Tube components Bill provided for me would fit in my compact Toyota...
Congratulations Hal! Thanks for the interesting report on Bill's operation. Hopefully, he'll be able to turn things around and get Phil Harrington to "take...
Hal, Phil Harrington, in the last edition of "Star Ware" said that he couldn't recommend Discovery scopes, not because of their quality, but because of the...
... Thanks, Mo (If I may...) It's true that delivery times have always been the bugaboo with Discovery, but they can never be faulted on Quality! When I...
Bill told (wrote) me many times about his operations and plans. However, there was no improvements in lead times, they were generated by the pyrex shortage. ...
Just put a "wanted" ad at Astromart looking for an 8" F/7. Obviously, a Discovery would be my first choice. If you know anyone willing to part with one, let me...
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