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Step 4Drill The Anode Mount
This is the only part where you will need to drill glass.
Carefully, using a small glass/tile spade bit, drill a hole large enough for the metal wire to fit through about half way down the length of the bottle. Make sure there are no cracks, if there are, you will need to start over. Drilling this hole is something you may want to practice a few times before you do it on the bottle you plan to use.
If you're afraid of using a drill to make the hole, then you can also do this by hand. First, use the spade bit to chip a small dent into the place where you plan to drill. Then, just apply some pressure and twist back and forth until the hole is cut. You should hear a scraping sound as the bit chips away at the glass.
Make sure you work in place where it will be easy to clean up small shards of glass in case your bottle shatters and wear appropriate protective clothing (long sleeve shirt, closed toed shows, leather gloves, etc.). Finally, once you're done, vacuum up the glass powder created by drilling the hole and proceed to the next step.
Unfortunately, I don't currently have any pictures of myself cutting or drilling the anode mount (my hands were a bit tied up at the time....). When I get back home, I'll get an assistant and try to take some.
In the meantime, here is a picture of the completed system to give you a better idea of where the anode mount should be.
IMPORTANT NOTE:
If you are afraid that your vacuum pump won't be able to pull the level of vacuum required for cathode ray tube operation, with a tube this size, then all you have to do is mount the anode closer to the cathode to reduce the level of vacuum that you need.
Carefully, using a small glass/tile spade bit, drill a hole large enough for the metal wire to fit through about half way down the length of the bottle. Make sure there are no cracks, if there are, you will need to start over. Drilling this hole is something you may want to practice a few times before you do it on the bottle you plan to use.
If you're afraid of using a drill to make the hole, then you can also do this by hand. First, use the spade bit to chip a small dent into the place where you plan to drill. Then, just apply some pressure and twist back and forth until the hole is cut. You should hear a scraping sound as the bit chips away at the glass.
Make sure you work in place where it will be easy to clean up small shards of glass in case your bottle shatters and wear appropriate protective clothing (long sleeve shirt, closed toed shows, leather gloves, etc.). Finally, once you're done, vacuum up the glass powder created by drilling the hole and proceed to the next step.
Unfortunately, I don't currently have any pictures of myself cutting or drilling the anode mount (my hands were a bit tied up at the time....). When I get back home, I'll get an assistant and try to take some.
In the meantime, here is a picture of the completed system to give you a better idea of where the anode mount should be.
IMPORTANT NOTE:
If you are afraid that your vacuum pump won't be able to pull the level of vacuum required for cathode ray tube operation, with a tube this size, then all you have to do is mount the anode closer to the cathode to reduce the level of vacuum that you need.
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Good luck!
Xellers
and , just out of interest, would this work in a carbon dioxide laser or even an electron microscope, or is it just to makeshift
But I want to know why the analog computer implementation of classic damped harmonic motion (mass/damper/spring) is on the whiteboard?
Dave
I accidentally stumbled upon a Heathkit analog computer kit manual online and was captivated by how simple analog computers that could solve pretty hairy systems of differential equations were, so I decided to grab a spare quad opamp IC from one of my Tesla coil projects and design a simple integrator-based computer that could do something cool. What you see on the whiteboard was the result.