The thing is that magnetic lines become horizontal at a very short distance from a cylinder magnet pole. So, your foil moves left-right more than back and forth. Then rotate it 90 deg clockwise, and it will be louder (and displace it from a center of the magnet)
I was using an old (big) stereo to power my speaker, you will need an amplifier of some kind to make this work headphone or RCA output will not work. To prevent the amp from shorting out and being damaged start with a very long narrow strip of foil, if that works you can try thicker strips to make it a little louder. Good luck and have fun!
When I first read about them I was surprises as well. With some careful folding of the foil and an impedance matching transformer the audio can be quite clear.
Just be careful of impedance. A normal speaker is 8ohms of impedance where as a foil strip is effectively 0. Try a very thin strip first as it will have a higher resistance than a wide strip.
+Nick Moore, cool man, I was wondering about the impedance, good thing I saw your reply here. :) +Justin Bell I tried it with these magnets and it worked but barely audible duckduckgo.com/?q=buzz+magnet&iax=images&ia=images Since, I got no neodymium magnets. You can used clothes pins (wood better than plastic) to hold the wires and foil on desired surface.
x9x9x9x9x9 I had read some instructions on how to add "perfect corrugations" to your 900$ ribbon speakers. It involved pressing it between 2 pieces of cardboard that were cut to a /\/\/\/\/\/\ shape.
Nick Moore yeah, but for your setup, any zigzags would likely make an improvement. Another method (piston corrugation) involves some transverse zigzags on each end, and a couple longitudinal groves down the middle.
Stephen Tack Interesting, like rolling long dimples in a car floor for rigidity. You end up with a large rigid section in the center with two flexible ends!
Due to the right hand rule, you'd get a force going sideways which would be as effective of a speaker due to the low flexibility in that direction and the foil thin surface area. Hope this helps!
+un2mensch I think you need a step-up transformer 1 : 37 a 5 volt transformer, used in reverse, say of a cheap USB charger might work. 220v to 5v Even though 220/37 = 5.95 v = ~ 6v a 110v to 3v transformer used in reverse might be very close to that value.
+un2mensch or build your own audio transformer, say with a big enough toroid, and 5 turns input and 185 turns output. it is a step-up. might work. You could salvage that toroid from old computer motherboard or ATX PSU power supply unit. And the wires could be found in old tube TV or CRT monitor. It is a black cable or other color fixated around the tube. ruclips.net/video/xMNTOXGdYM4/видео.html ruclips.net/video/yPP4zR74Fr0/видео.html
That was awesome, Nick!
Thanks, I was one of those "ideas from nightshift" projects.
I swear you watch all the same videos I do. Damn you Jeff.
The thing is that magnetic lines become horizontal at a very short distance from a cylinder magnet pole. So, your foil moves left-right more than back and forth. Then rotate it 90 deg clockwise, and it will be louder (and displace it from a center of the magnet)
I have to do this with my kids tomorrow. Thanks for the idea!
I was using an old (big) stereo to power my speaker, you will need an amplifier of some kind to make this work headphone or RCA output will not work. To prevent the amp from shorting out and being damaged start with a very long narrow strip of foil, if that works you can try thicker strips to make it a little louder.
Good luck and have fun!
Great work Sir 💯👈💥💥💥💥💥😎
This probably sounds better than my computer monitor speakers 😂
Totally awesome. Great vid, as usual.
Thanks, I was surprised how well it worked with no real tuning or refining.
Wow, so elegant and simple.
When I first read about them I was surprises as well. With some careful folding of the foil and an impedance matching transformer the audio can be quite clear.
Definitely going to make one of these.
Just be careful of impedance. A normal speaker is 8ohms of impedance where as a foil strip is effectively 0. Try a very thin strip first as it will have a higher resistance than a wide strip.
+Nick Moore, cool man, I was wondering about the impedance, good thing I saw your reply here. :)
+Justin Bell I tried it with these magnets and it worked but barely audible duckduckgo.com/?q=buzz+magnet&iax=images&ia=images
Since, I got no neodymium magnets. You can used clothes pins (wood better than plastic) to hold the wires and foil on desired surface.
Try corrugating to cut down on the foil-rattle.
Good idea. The same way a ribbon mic operates, in reverse.
x9x9x9x9x9 I had read some instructions on how to add "perfect corrugations" to your 900$ ribbon speakers. It involved pressing it between 2 pieces of cardboard that were cut to a /\/\/\/\/\/\ shape.
Nick Moore yeah, but for your setup, any zigzags would likely make an improvement.
Another method (piston corrugation) involves some transverse zigzags on each end, and a couple longitudinal groves down the middle.
Stephen Tack Interesting, like rolling long dimples in a car floor for rigidity. You end up with a large rigid section in the center with two flexible ends!
plus.google.com/+StephenTack/posts/RTMy4dhKuZK?pid=5728206211159389154&oid=113574383147361395957
Exactly.
Sounds a bit tinny. huehuehuehue. I'll see myself out.
Damn you foiled my plans to make a pun
What happens if the magnet are placed behind the ribbon instead of sideby the ribbon?
Due to the right hand rule, you'd get a force going sideways which would be as effective of a speaker due to the low flexibility in that direction and the foil thin surface area. Hope this helps!
How did you power it? Just straight out the amp to the ribbon? Transformer? or like 4ohm series resistor? What watt was the amp driving?
I used a transformer that was about 30:1 to step the voltage down and the current up. The amp puts out around 50watts.
Now plug it into your mic port and record!
If I put it back together later I'll hook it too the scope and see what kind of signal it will put out.
Nick Moore
un2mensch It's a ribbon microphone. en.wikipedia.org/wiki/Ribbon_microphone
you need a transformer.
+un2mensch I think you need a step-up transformer 1 : 37
a 5 volt transformer, used in reverse, say of a cheap USB charger might work. 220v to 5v
Even though 220/37 = 5.95 v = ~ 6v
a 110v to 3v transformer used in reverse might be very close to that value.
+un2mensch or build your own audio transformer, say with a big enough toroid, and 5 turns input and 185 turns output. it is a step-up. might work.
You could salvage that toroid from old computer motherboard or ATX PSU power supply unit.
And the wires could be found in old tube TV or CRT monitor. It is a black cable or other color fixated around the tube.
ruclips.net/video/xMNTOXGdYM4/видео.html
ruclips.net/video/yPP4zR74Fr0/видео.html
Is that copper foil?
Awesome. The lighting made it look copper I guess.
x9x9x9x9x9 That's my "laboratory" lighting, most everything I shoot down there is lit with a 500w halogen light.
Crosses over at 2k hz
glue iton a stretched plastic sheet yo will get more sound
Yes, that would significantly increase the surface area and move much more air.
It would make it similar to a planar magnetic speaker
Both use a similar working concept. A current through a wire, or metal sheet manipulated by a magnet.
you invented the ribbon speaker)))