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Step 8Construction 2 - sealing and diaphragm
Obviously, in order to get this thing to function the way we want it to, we're going to have to seal up the tube and create a diaphragm.
First - Use duct tape to cover the potentially sharp edges of the tube - this will prevent the ducting from ripping through the diaphragm. You'll probably want to use more than one layer, but again, this is coming from my experience with the ventilation ducting. Depending upon the type of material you're using, it may not be necessary.
Second - Cut a latex sheet to serve as your diaphragm. You'll definitely want to cut it large enough to completely cover the end of the tube with enough extra to tape down and pull taut. You can see from the image that the size I selected was roughly 6 inches square. It's also worth noting that my picture reflects the use of polyethylene sheeting. This will work, however latex will provide additional flexibility. It's also worth noting that latex will slowly oxidize, and may need replacing over time.
Third - Start taping the sheeting down to create the diaphragm. The concept here is to basically emulate the head of a drum. It needs to be tight enough to allow it to easily vibrate, but not so tight that it will tear. Once satisfied tape down, or trim the excess, and tape around the circumference of the tube in order to create an airtight seal.
Fourth - On the other end, repeating the processes will allow for later experiments using a "stereo" Rubens' Tube. However, simply sealing it off with duct tape to create a good seal is a perfectly acceptable method to create a functioning device. In either case, be careful what you set the opposite end on to make sure you preserve airtight seal.
Fifth - Finally, if you're using ventilation ducting like I am, it's worth while to run a bead silicone sealant down the seam of the tube. I pressed it into the joint using my finger, and then cleaned up the excess. Now we have our tube completely sealed where we want it to be.
First - Use duct tape to cover the potentially sharp edges of the tube - this will prevent the ducting from ripping through the diaphragm. You'll probably want to use more than one layer, but again, this is coming from my experience with the ventilation ducting. Depending upon the type of material you're using, it may not be necessary.
Second - Cut a latex sheet to serve as your diaphragm. You'll definitely want to cut it large enough to completely cover the end of the tube with enough extra to tape down and pull taut. You can see from the image that the size I selected was roughly 6 inches square. It's also worth noting that my picture reflects the use of polyethylene sheeting. This will work, however latex will provide additional flexibility. It's also worth noting that latex will slowly oxidize, and may need replacing over time.
Third - Start taping the sheeting down to create the diaphragm. The concept here is to basically emulate the head of a drum. It needs to be tight enough to allow it to easily vibrate, but not so tight that it will tear. Once satisfied tape down, or trim the excess, and tape around the circumference of the tube in order to create an airtight seal.
Fourth - On the other end, repeating the processes will allow for later experiments using a "stereo" Rubens' Tube. However, simply sealing it off with duct tape to create a good seal is a perfectly acceptable method to create a functioning device. In either case, be careful what you set the opposite end on to make sure you preserve airtight seal.
Fifth - Finally, if you're using ventilation ducting like I am, it's worth while to run a bead silicone sealant down the seam of the tube. I pressed it into the joint using my finger, and then cleaned up the excess. Now we have our tube completely sealed where we want it to be.
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Feb 25, 2010. 5:55 PMSilverdragon066
says:
my pipe is a 1 inch diameter copper pipe about 4ft long.. would it work?
Reply
Oct 19, 2008. 10:46 AMfcaetano
says:
What can I use instead of the latex sheet?
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2
Feb 4, 2009. 1:30 AMmilamber
says:
a condom
Reply
Dec 29, 2008. 4:16 PMSchnuh330
says:
latex is really easy to acquire you can use balloons, condoms (with a small enough speaker or big-man "Magnum Brand" condoms for a larger speaker lol) latex gloves, or even a dental dam.
Reply
1
Oct 19, 2008. 4:28 PMyourtvlies (author)
says:
Anything that's both airtight, and can be pulled tight across the opening. I'd imagine that even part of a garbage bag or similar would do the trick.
Reply
Jan 16, 2009. 7:52 PMbugulagak123
says:
I am confuse, If the other end is the diaphragm made by latex sheet, then what will be the material used for the other end? is it another diaphragm? or a seal?
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