A Mystery Scope!
Posted 30 January 2010 - 05:53 PM
Posted 30 January 2010 - 05:56 PM
Posted 30 January 2010 - 05:58 PM
Posted 30 January 2010 - 06:00 PM
Posted 30 January 2010 - 06:02 PM
Where does anyone get enough water in Tucson to rust anything?
It's been a wet winter this year, but normally, we just get the monsoon season in the summer and that's it. I think this telescope may have spent some time up in the mountains where it rains more often.
Posted 30 January 2010 - 06:12 PM
From left to right, the 3 indicator lights were not connected to anything at all (you're looking at the underside). The big orange capacitor is for the synchronous motor to operate in both directions, the RA and Dec motor and gear assemblies. Both motors are Hurst 2 RPM 120v AC. Finally, the electrical junction block with another round capacitor and the RA illuminated reticule. The blue wires on the top right go to one of the light bulbs that plug into the back of the reticules.
The wiring is not that complicated - two motors and two lights. I will probably redo this area a little to make it look neat by putting everything in a Radio Shack project box like I did on the Cave mount. The wiring is old and cracked with lots of chew marks from pack rats.
Posted 30 January 2010 - 06:16 PM
Posted 30 January 2010 - 06:17 PM
On the underside, there is what looks like a AA battery mount. This DC voltage is probably for the illuminated reticule. The wiring also goes to a jack that was for something. There is another jack on that junction board and also one on the motor driven focuser block.
Posted 30 January 2010 - 06:36 PM
Posted 30 January 2010 - 06:40 PM
Posted 30 January 2010 - 06:41 PM
Looks like fun, you definitely got one of a kind and your work cut out for you,and like I said 1st "looks like fun"
It's fun, but the funner part is after everything is cleaned up, painted, lubed and ready to be put back together again. The not-fun part is rust and old paint removal.
Posted 30 January 2010 - 06:46 PM
The dried out rusty goo on the aluminum parts will clean up easy and then it's just a lot of polishing.
Posted 30 January 2010 - 06:53 PM
Posted 30 January 2010 - 06:57 PM
Posted 30 January 2010 - 07:01 PM
Posted 30 January 2010 - 07:05 PM
Posted 30 January 2010 - 07:08 PM
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Posted 30 January 2010 - 07:13 PM
Posted 30 January 2010 - 07:14 PM
Posted 30 January 2010 - 07:15 PM
Posted 30 January 2010 - 08:03 PM
The mirror blank was obviously made by Corning Glass Works of New York. (My two 8-inch mirrors, one by Coast Instrument and one by Cave, are Corning glass that were both aluminized by Panchro, but neither had their backs ground flat like yours.)
I lived within a 30-minute bicycle ride of Signal Hill, Calif. from 1955 to 1960, was a rabid amateur astronomer and telescope maker but never heard of Morvac. The only places that I ever knew of that did aluminizing for telescope mirrors in Southern California in those days were Panchro and Keim.
There was a Nye Optical Co. on Cherry Ave. on Signal Hill, which I visited a number of times for mirror making supplies. (I donated a 1958 Nye catalog to Bob Provin for his Classic Telescopes and Catalogs website. Here's a link to it. On page 7, it mentions that aluminizing service was furnished, but I think they used Panchro and/or Keim, the same that nearby Cave and Coast Instrument used.)
Perhaps the maker of your 8-inch had professional connections to Morvac on Signal Hill, which may have only done optical coatings for industry. Maybe they aluminized this mirror as a favor or as a "G-Job."
Dan, so glad you're the one who found this scope. In your hands, it'll be brought back to better than new condition. Looking forward to the progress reports!
P.S. Oh, by the way, here's a picture of my Corning Glass Works 3-inch ashtray that was made as a sourvenir to commemmorate the successful pouring of the 200" Palomar Pyrex blank. I found it on the Bay a few years ago.
Posted 30 January 2010 - 08:16 PM
Not dead; that's a skin. Little fella probably lived a bit longer.
Fortunately, this one was already dead, neighbor of the spider.
Also, no signs of black widows... yet. You need to look for sizeable egg sacs that should be fairly smooth, between 6mm and 8mm (possibly up to 12mm) in diameter. If you come across egg sacs of similar size but a little spikey looking, thems brown widow's. And they can be just as nasty...
Posted 30 January 2010 - 08:45 PM