Hi Everybody, I followed the trail blazed by earlier explorers and fabricated a brace or stiffener for my 12.5" PDHQ's rocker box. I used 3/4" Finnish birch ...
Hello All, this is my first posting on this board. I have recently been diagnosed with acute aperture fever, and a 12.5 PDHQ is on my short list. Has anyone...
Hi folks, I'm ready to install the wheelbarrow handles on my 12.5" TD scope and have a question about the "best" position of the handles. Some of the photos...
... have a question about the "best" position of the handles. Didn't you say that the mounting holes are already in the rocker box? (That may have well been...
Thanks Mike, The mounting holes are on the box but they are a liitle too low because of the 10" wheels. Maureen ... scope and ... box? ... mounting and ... ...
Hi Maureen, I have the 17.5 TD and I used the existing mounting holes and also used pneumatic wheels. My handles allow me to set the rocker box and ground...
This scope is about 18 months old, it has a 2" thick mirror. It takes up a lot of space in my bedroom and because of my bad shoulder doesn't go out on the...
Hi All, Thanks again for the useful info on the 9mm ortho HD I was asking about. I've used it a couple of nights now in my light polluted (street lamp...
I forgot to mention that with the Ortho on Juptier I watched a shadow transit of one of from one the Jovian moons (it was probably whichever moon casts the...
Hi Bradley, Thanks for the detailed report. I don't know if it will be the case with your plossl and ortho, but last year I had a similar experience comparing...
Has anyone been able to adjust the secondary spider on the 15" Discovery, or know whether it can be adjusted at all? The lugs on my spider are all flush...
Bill, The idea of offsetting the secondary only in one dimension (along the axial line) will, indeed, produce an optical axis that is not coincident with the...
Hi My 8" PDHQ finally arrived on Wednesday. Of course I've been two busy with work to assemble it and the weather is now going to "tank" for the next few days....
Don, Thanks for sharing your performance results since I haven't had a clear night yet to try it with the DSC. I agree that collimation should be perfect if...
hi - is there a manual available on the web for the 12.5" truss design scope? i've looked in several spots, as well as done several searches, and can't find...
Gary, The poles have end-of-pole flange inserts that tighten into the poles. On the bottom, there is a 90 degree flange on the end of the pole, with a hole in...
... some ... mirror ... the ... coming ... secondary ... about ... Jeff, This does not sound right at all. I hope they are not doing this to the PDHQs. This...
Jeff, This does not sound right at all. I hope they are not doing this to the PDHQs. This sounds almost like the old Coulters with their fixed secondary...
... I have been having a number problems and questions that I notice you have addressed in your postings. I am hopeful that you and others at this site can...
Maureen, There are so many things that can flex as the scope lowers in altitude. On my 12.5", I determined the spider was flexing when the scope lowered...
All I spoke with Bill today at Discovery about my secondary holder. It sounds like the secondary holder I got with my scope is the way the 8"ers are being made...
Jeff, I'll be interested in Discovery's response. I have a 10" ordered and assume I'll get the same mirror mount. How long did it take to get your scope? Tom...
Thye weather didn't cooperate with my desire to go to Joshua Tree NP for some dark sky observing this weekend, so I headed to the garage to play with my scope!...
I moved my primary mirror forward about an 1/2" and there's a red dot on the outside and on the mirror cell are they to be lined up? Also can you tell me why,...
Don, Thank you for your detailed answer. To answer your question the dot moves down so I guess the problem is at the top of the scope. I am attempting to fix...
Maureen, My comments are below in caps. Don ... collimating ... YES, THIS MEANS THE SAG IN THE SPIDER VANES IS LIKELY TO BE THE CULPRIT. ... "The ... the ... ...
Hi Eurvin, There's a red dot on my mirror cell and one on the tube also. They were lined up (both at the 8 o'clock position when viewed from the rear of the...
ED I did turn it so as long as it makes no difference I'm OK! I didn't want to move the mirror again! Thanks Eurvin! [Non-text portions of this message have...
In my original post I mentioned a dob balance kit and said I got it from Scopetronix. I screwed up (again). I actually purchased it from ScopeStuff. My bad, Ed...
I have just joined this group because I am considering the purchase of a 17.5 PDHQ. I would like opinions about the quality of the mirrors being used in this...
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