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New member, ancient ATMer.
I have joined to directly access Pulsar dome owners' fund of information.
I am building a raised platform 8' off the ground to provide a much bigger sky.
Trees and hedges surround and interrupt our dark rural property.
Our modest 1.5 story home is on the southern border of our large garden.
Fortunately neighbours with security lights at a hundred yards south and SW are safely hidden by the house.
Increasing age demands shelter from the almost constant wind.
My two main OTAs are now much too heavy for easy lifting:
I am using a chain hoist and nested stepladders!
I have a 10" f/8 reflector with premium optics and a 7" f/12 R35 iStar refractor. [Presently folded.] Both ATM builds.
My almost completed, massive DIY GEM has 2" shafts and lots of heavy aluminium. ie. Immovable!
It is running AWR IH2/ASCOM drives to 11" and 8" Beacon hill wormwheels.
The images show my mounting on a temporary test stand.
Now the real reason for my unscheduled interruption: [Much as I like talking about myself.]
I am torn between a DIY all aluminium, rotating "dome" of the cylindrical roof variety or buying a Pulsar 2.7m. dome only kit.
Making a hemispherical dome is a long term exercise in geometrical and sealing frustration IMHO.
The off-the-shelf Pulsar 2.7 is rather cramped for my 2 meter long Newtonian even when the dome is mounted on a much larger "box".
Does any recent Pulsar 2.7m dome purchaser have the minimum internal dimensions between opposing quadrant ribs?
I understand the 2.7m is actually 2.6 from Pulsar's own drawings but that may be external.
With so little clearance available I really need an accurate figure.
Thank you for your patience if you have reached this far.
Finally it's time to start a project i have been planning for a while. My remote Linux - INDI observatory
Some info about the project. The observatory is going to be box style. I don't do any visual stuff, so i wont make room for myself. It is going to sit on a south facing second story balcony at my parents place. It's by a fjord near Drammen, Norway, so almost everything southbound is water and zero light pollution. The house itself sits on a spot with mostly green and yellow on the LP map, so beats my apartment where there is dark red LP as far as the eye can see (sadly)..
To start things off, I'm building the pillar. As it's on a balcony, there will be no way to dig and cast a base in concrete. However concrete (b30) will be used to make the pillar more substantial. I want it to be very rigid, and I guess by having some weight to it, some flex in the floor will be "pre flexed".
Any project starts with a good drawing so here is some cad. The outer tube is a cardboard casting tube. It sits on a wood plate with a total thickness of about 3.6 cm, has four m20 threaded rods that will be casted in with four 50x35 cm steel angels for stability. On top there is three steel plates connecting the base to three m20 bolts with mounts for the celestron avx. I will use the celestron's plate from the tripod (removing the legs) on top to mount the head on. The gap between plate one and two from the top is to be able to adjust and level the mount. I will have to get the three plates and three blocks on the right fabricated, but hopefully at a acceptable prize, hopefully...
This weekend was mostly drawing, but did get something started.
Let me know what you think about the design. More to come as project progresses...