Tuesday, September 27, 2016
Saturday, September 24, 2016
Thursday, September 22, 2016
Wednesday, September 21, 2016
A neat beginning to building his kit, Zac, in Georgetown, Kentucky, starts by applying some graphics. It'll be interesting to see this telescope come together. Here's what Zac has to say:
"Dennis -- Getting some graphics in, these are rub off letters that i have used on models for years, you place the plastic backing over it and rub three the plastic to apply the letters, they are super thin and will be glossed over and will never come off."
Monday, September 19, 2016
Hi Dennis, Here is my DobStuff XT10 conversion out on my driveway in Dallas for some observation of Jupiter on Saturday morning, December 19. Just average seeing, but I still managed to watch a good part of an Io transit over about an hour with some reasonably clear views throughout the session. The scope is really great to use.
Back when you were doing the build for me, I mentioned that primary mirror cooling was one of my main reasons for doing this. I now run both the mirror cell fan and (don’t laugh…) a second cooling fan as shown in the picture. This homemade implementation – rubber bands and all — works really well. The cooling power is greatly increased and I don’t notice any vibration/image blurring. (I have tested it with the second fan both on and off on during planetary observation like the one from yesterday morning.)
Anyway, FYI and thanks again for the great scope! - Wyatt
|Grant's 16" telescope project is coming along. Here, Grant has asked|
for the "strut rocker box". It lightens the weight and is still very rigid.
|A 13.1" 6-point flotation mirror cell for Stephen in Wayland, Massachusetts.|
|With the adjustable back plate, the mirror cell will easily fit|
Stephen's 16" telescope tube.
Sunday, September 18, 2016
Saturday, September 17, 2016
Wednesday, September 14, 2016
|All packaged up and ready to go.|
Sunday, September 11, 2016
|Zac asked for solid rocker box sides. Otherwise, it's virtually complete.|
I always assemble the rocker with clamps to check for the fit.
In this case -- it's just right!!
|Zac's 14" strut kit is close to completion. Here are the rocker box sides,|
altitude bearings and bearing-clamps are completed.
Tuesday, September 6, 2016
|One final task is to do to properly set the strut length is to|
setup the optical system and perform a star-test.
|I set the struts with a simple-to-use system as found on this webpage:|
The adjustable test struts let me fine-tune the length as needed.
In this case, this 14" F4.6 has struts that are 63.5" in length.
Monday, September 5, 2016
|A Moonlite 2" crayford focuser.|
|The 3-vane spider is a Destiny. Note the Kendrick secondary dew heater installed.|
|The top ring for Zac's OTA is complete. The secondary is a |
2.6" Antares 1/15th wave optic.
|A good sized ventilation hole for cooling during setup and use.|
|The 6-point cell on the mirror board.|
Sunday, September 4, 2016
Saturday, September 3, 2016
|A 0.98 strehl -- not bad.|
An F4.66 focal ratio.
|The 14" mirror as received from Hubble Optics in Hong Kong.|
|The coating is very nice -- the mirror comes center marked for easy collimation.|
|This is a "sandwich mirror" -- two glass disks separate|
with spacers. Easy cooling. Nice!!