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About Sleeper

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    Denton, Texas
  • Interests
    Watches, Navigation, optics, telescopes, microscopes, metrology and meteorology.

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  1. I got it open. It is a screw off back. It has a tiny 6 mm quartz movement inside. A $350 watch with a $5 movement. I could put a huge 44 mm movement in this case and still have extra room.
  2. I was just handed a Marc Echo watch. It look like a screw off back but looks like a few people have used a jaxa tool on it and scratched it up. I tried a tacky ball and it is real tight if a screw off. I don't see a notch anywhere for prying off. Any one know how to get in this case?
  3. back and forth cold to hot may do it. Put it in the deep freezer then in a warm oven 105c/220f degree. It may work it loose. The two metals expand and contract at different rates. I have had some luck with this method.
  4. I am a EE and have been working PCs since the 1980s. A long 7 inch shaft #2 Phillips screw driver with a hardened tip has been my go-to tool for the last 30 years, I still have the same one I bought in 1988, it's a Klein and cost $17 back then. The long shaft is helpful in tight spaces and keeps your hands out of the way. A 6 piece Klein Telephone Lineman screwdriver set would go for about $90 / £80. I use the spinner drivers that set comes with allot as well (they have a bent shaft and free spin in the handle and work like a small hand drill). All Dell and HP computers can be completely disassembled with a good #2.
  5. advice on tanks, stay away from the small disposable OXY tanks. Get at least 2 litter refillable OXY tanks. The small disposable tanks are filled with just low pressure gas and last about 45 seconds. They are impossible to dispose of easily. I had to take them to hazardous waste center. Medical grade 4 litter tanks are best. They are easy to get refilled, are filled very clean oxygen and have the same connections as commercial / industrial tanks. A least this all true here in the United States. Don't know about the tanks available to our friends on the other side of the pond.
  6. Working in electronics we now use silver/tin and silver alone all the time since lead is now banned. Heat sinks are important to keep from melting other things. Wet rags, alligators clips and so on. I have a leftover hunk of 25mm thick granite counter I use to put hot parts on to cool them quickly. Also a heat sink will keep the soldered area hotter longer while keeping the rest cool. Old pliers with a rubber band on the handle to hold them closed helps quit a bit when soldering with silver. Use Oxy-MAPP, Oxy-propane or Oxy-acetylene mini torches as they heat faster than butane or propane micro torches. Speed is the key, heating things for a long time just melts it all to a puddle. Oxy-acetylene is like a paint brush it's so fast.
  7. Back in the Stone age of computers we used degaussing coils about 10 inches around to fix old CRT monitors. The Shadow mask on CRTs and TV sets was made of steel and would magnetize and cause bright spots and ghosting. They had the hoops at Radio Shack for $12 till the around 2004. They are still around and still cheap. I see them at swap meets and on EBay now and then. Looks like a needlepoint hoop with a power plug. Mine works great for watches.
  8. Not really a good tool for this. To de magnetize the watch it needs to be inside a alternating field like the coil in the picture posted. This tool is for getting rid of polarization in a recording head. The magnetic field is really small and the probe end has to touch what you want de-magnetize, this would make it worse with a watch spring. Just so you know a DC powered coil will magnetize things and a AC powered coil will de-magnetize them.
  9. The small second hand saga goes on and on. The shaft top is about 1 to .5 mm below the dial. Can't see once I put the second hand near the hole. The shaft is also slightly offset to hole. I even made a jig to hold it in a case holder at a 25 degree angle so I could try and use my microscope. I am wondering how long the shaft should be and if the problem is with the shaft, the watch dial or the height of the hand. Might be lack of experience on my part.
  10. There is a ongoing topic in this forum that a member has written some software and designed a pre-amp for the PC. If you look around you should find it. Last post I saw was in early March.
  11. Granite is not just solid stone, it's mostly chucks of silicates like quartz so it is very hard like glass but all pressed together like a huge block of broken bits. As a surface it is abrasive. When I tested metrology tools I would test gage blocks and the granite plates for wear. It tended to be the hardened steel gage blocks that would show wear from being used on the granite plate. Granite plates are slightly porous while being very flat and harder than steel. So the flat gage blocks can be moved around with digging in or sticking. It is a ultra fine abrasive. You may want the teeth to have a smoother, less abrasive wear surface like steel or a ceramic. The granite would be a great backing to that surface. Think like a dental crown for teeth. I think as gears the granite wheels would eat themselves up. In France there are a great many abandoned mill stones. Many are dark Alpine Granite. Some are hundreds or thousands of years old. Those might be great for your project. Possibly even very inexpensive. Here in the states a great many have been imported to be re-used as mill stones. A water powered grain mill in Waco Texas has two pairs of French stones. The miller says as long as they don't touch the stones last forever. I wish you great Success!
  12. I had a customer order granite plates from Starrett to use in telescopes as temp stable baseplates. They have the same expansion and contraction rate as both aluminum and borosilicate glass. So for securing the aluminum truss it was perfect. I made the worm gear for his clock drive out of aluminum alloy for the same reason. All this mass made his scope very stable. All that said you could cut your gears from aluminum and hide that in granite. so it would look like great big granite wheels.
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