My goal: 60 dBs efficiency. HORRIBLE efficiency. But since the ones I've built before were like 20 dBs efficient, I'm hoping for a 40 dB increase, and I think I can get it right this time.
I have discovered that using plastic tubing, strange wooden jigs and kitchen cling-wrap, I can make servicable surround materials out of mostly bathroom silicone.
Isn't that amazing??? It's probably not as durable as rubber, but it looks like it will have just as high compliance.
The "cone" will be a compact disc.
The voice coil will be a large (LARGE) copper wire, enameled, and I don't know yet what I'll be using for a voice coil former. I know it has to be large enough that my magnets of coice (neodyniums from hard drives) can sit around the outside of the CD and make the voice coil jump around. I want to have the former be destroyable, so that after I get the voice coil wound and epoxied, I don't have to worry about my (no-doubt crummy) homemade VC former melting like my last experiment. (The office does smell tolerable now, and I'm not about to change that. 😀 )
I'm taking suggestions on formers for a 12 cm voice coil that can later be destroyed so the voice coil is supported by its own epoxy.
(I had previously posted a 6" voice coil, but obviously that's not right. A CD is 12 centimetres wide, so the voice coil former needs to be just less than 12 cm in diameter. Yes, that's a huge voice coil. Yes, it's just an experiment. We'll see what develops.)
I'll be posting pictures here as I get them taken, and when I'm finished, I'll have a new thread (or maybe just a webpage) set up with all the gory details.
*ponders*
Alright, I think that's it. By the way, the basket will be made of legos. That's right, the children's building blocks. They're actually pretty strong when glued, and I have a perfect glue for them.
Comments? Suggestions? Ideas for the voice coil former? Let me know!!
I have discovered that using plastic tubing, strange wooden jigs and kitchen cling-wrap, I can make servicable surround materials out of mostly bathroom silicone.
Isn't that amazing??? It's probably not as durable as rubber, but it looks like it will have just as high compliance.
The "cone" will be a compact disc.
The voice coil will be a large (LARGE) copper wire, enameled, and I don't know yet what I'll be using for a voice coil former. I know it has to be large enough that my magnets of coice (neodyniums from hard drives) can sit around the outside of the CD and make the voice coil jump around. I want to have the former be destroyable, so that after I get the voice coil wound and epoxied, I don't have to worry about my (no-doubt crummy) homemade VC former melting like my last experiment. (The office does smell tolerable now, and I'm not about to change that. 😀 )
I'm taking suggestions on formers for a 12 cm voice coil that can later be destroyed so the voice coil is supported by its own epoxy.
(I had previously posted a 6" voice coil, but obviously that's not right. A CD is 12 centimetres wide, so the voice coil former needs to be just less than 12 cm in diameter. Yes, that's a huge voice coil. Yes, it's just an experiment. We'll see what develops.)
I'll be posting pictures here as I get them taken, and when I'm finished, I'll have a new thread (or maybe just a webpage) set up with all the gory details.
*ponders*
Alright, I think that's it. By the way, the basket will be made of legos. That's right, the children's building blocks. They're actually pretty strong when glued, and I have a perfect glue for them.
Comments? Suggestions? Ideas for the voice coil former? Let me know!!
former
How about this. Take a wooden dowel. Wrap some masking take around it, sticky side up, to hold the first wrapping of wire in place. When you're done, slide out the dowel and peal away the masking take, leaving you with only the coil held together by the epoxy. I tried this and it worked.
Vic
How about this. Take a wooden dowel. Wrap some masking take around it, sticky side up, to hold the first wrapping of wire in place. When you're done, slide out the dowel and peal away the masking take, leaving you with only the coil held together by the epoxy. I tried this and it worked.
Vic
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