http://imgur.com/keozu.jpg
http://imgur.com/bmrpH.jpg
http://imgur.com/BFpGe.jpg
http://imgur.com/I4fWO.jpg
http://imgur.com/NGWGt.jpg
http://imgur.com/VycM7.jpg
http://imgur.com/qlObq.jpg
http://imgur.com/b3Svk.jpg
http://imgur.com/b3Svk.jpg
http://imgur.com/8s8im.jpg
1) 2 boards in position and cut out marked.
2) Ready to cut out hole with jig saw.
3) Hole cut out.
4) Perforated steel sheet ready to cut with scissors.
5) Perforated steel sheet in place.
6) Magnets in position.
7) Tape position marked down sides.
8) Tape position marked.
9) Finished article in position.
I hope this helps JonasKarud, 😀
http://imgur.com/bmrpH.jpg
http://imgur.com/BFpGe.jpg
http://imgur.com/I4fWO.jpg
http://imgur.com/NGWGt.jpg
http://imgur.com/VycM7.jpg
http://imgur.com/qlObq.jpg
http://imgur.com/b3Svk.jpg
http://imgur.com/b3Svk.jpg
http://imgur.com/8s8im.jpg
1) 2 boards in position and cut out marked.
2) Ready to cut out hole with jig saw.
3) Hole cut out.
4) Perforated steel sheet ready to cut with scissors.
5) Perforated steel sheet in place.
6) Magnets in position.
7) Tape position marked down sides.
8) Tape position marked.
9) Finished article in position.
I hope this helps JonasKarud, 😀
Membrane movement.
Quite easily the membranes are on the outside! They also move in unison, which allows the membranes too move a good distance so you get good output. I did wire them up differently at first but the membrane hardly moved at all. You live and learn..😱
Quite easily the membranes are on the outside! They also move in unison, which allows the membranes too move a good distance so you get good output. I did wire them up differently at first but the membrane hardly moved at all. You live and learn..😱
00ps
Put one picture in twice, silly me, it was late in the day, and I was feeling a bit rough. But they convey the idea all together.😱
Put one picture in twice, silly me, it was late in the day, and I was feeling a bit rough. But they convey the idea all together.😱
Wrinex.
I hope you don't mind me saying, but I wouldn't bother with the 2.2 meter high bass panel. I built one about that size, and was very disappointed in the outcome. In fact it was no louder or better in the bass than one of my 21" x 24" planars I had built previously.😉
I hope you don't mind me saying, but I wouldn't bother with the 2.2 meter high bass panel. I built one about that size, and was very disappointed in the outcome. In fact it was no louder or better in the bass than one of my 21" x 24" planars I had built previously.😉
yeah they are , also a pain to mount i thought later, without wobling, but still im really fond of the mix idea of magneplanar and electrostatic speakers.
Hi Henry
Have you tried to arrange the magnets in rows or columns with a space between them? A magnet-wide space..
Then run the foil tape on top of the space between rows or colums
I think you will save 50% of magnets and get a higher output
Have you tried to arrange the magnets in rows or columns with a space between them? A magnet-wide space..
Then run the foil tape on top of the space between rows or colums
I think you will save 50% of magnets and get a higher output
Just a thougt;
What difference does it make if I have a odd or even number of colums with alternating oriented magnets
I am considering 5 or 6 colums with 800mm lengths of 10 mmwide magnets
If I only run the film between columns 5 or any other odd number seems to be a sound solution - foil will start and end on the same side of the diaphragm
Bent
What difference does it make if I have a odd or even number of colums with alternating oriented magnets
I am considering 5 or 6 colums with 800mm lengths of 10 mmwide magnets
If I only run the film between columns 5 or any other odd number seems to be a sound solution - foil will start and end on the same side of the diaphragm
Bent
the simple rule
north in the palm of your hand
signal in the direction of your finger
and it moves in the direction of your thumb
this should be true all over the diaphragm
HI BENTL
Tried your suggestion but gave up after a while, the magnets kept moving and touching each other. It would need the magnets being glued in position. And aluminium bars placed in between each row till the glue set. Then if there was no improvement in the sensitivity you would have a job removing magnets! I don't have the patience for this so will stick with my original design. If anybody out there feels up to the challenge ? I wish you good luck. You'll need it!😀
Tried your suggestion but gave up after a while, the magnets kept moving and touching each other. It would need the magnets being glued in position. And aluminium bars placed in between each row till the glue set. Then if there was no improvement in the sensitivity you would have a job removing magnets! I don't have the patience for this so will stick with my original design. If anybody out there feels up to the challenge ? I wish you good luck. You'll need it!😀
Hi,
as long as one uses some distance pieces of plastic or wood its quite simple.
Picture shows first row in place. I put down the magnets with plastic pieces between them. Then I flip the panel upside down, and apply a drop of superglue through the perforation. The capillary effect sucks the superglue between the perforated plate and magnet and it sticks!
I discovered something strange when mounting the magnets - I used a little toy compass to determine the orientation. After a while the compass' magnetization was reversed and i started to mount the magnets wrong...
Now i have a "master magnet" where I have marked N and S and use it to determine orientation
the magnets are fittet with 25mm clearance to the frame, and 15mm distance between columns. 10 mm distance between magnets lengthwize.
Regards
Bent
as long as one uses some distance pieces of plastic or wood its quite simple.
Picture shows first row in place. I put down the magnets with plastic pieces between them. Then I flip the panel upside down, and apply a drop of superglue through the perforation. The capillary effect sucks the superglue between the perforated plate and magnet and it sticks!
I discovered something strange when mounting the magnets - I used a little toy compass to determine the orientation. After a while the compass' magnetization was reversed and i started to mount the magnets wrong...
Now i have a "master magnet" where I have marked N and S and use it to determine orientation
the magnets are fittet with 25mm clearance to the frame, and 15mm distance between columns. 10 mm distance between magnets lengthwize.
Regards
Bent
HI BENTL
Let me know how it sounds in comparison to the older design. Keep the pictures coming, well done. But shouldn't the magnets be around the other way? I would have placed the magnets 90 degrees differently I am confused by your layout! Must be getting old!!😕
Let me know how it sounds in comparison to the older design. Keep the pictures coming, well done. But shouldn't the magnets be around the other way? I would have placed the magnets 90 degrees differently I am confused by your layout! Must be getting old!!😕
Hi,
i don't think that the layout of the magnets matter very much.
If you arrange them in rows or columns you use about the same length of magnets and coil I guess (havent calculated on yet)
In my design I plan to run the alu conductor across the diaphragm without folding it - and connect the parallell conductors with a piece of wire with cable shoes.
As far as I know; Apogee used horisontal rows of magnets, while Magnepan uses columns. If you look at Båndsei's planars, he also uses columns of magnets and the design very diy-friendly in my eyes.
I will post some more pictures in a while but are trapped at work and the progress on the project is very low..
i don't think that the layout of the magnets matter very much.
If you arrange them in rows or columns you use about the same length of magnets and coil I guess (havent calculated on yet)
In my design I plan to run the alu conductor across the diaphragm without folding it - and connect the parallell conductors with a piece of wire with cable shoes.
As far as I know; Apogee used horisontal rows of magnets, while Magnepan uses columns. If you look at Båndsei's planars, he also uses columns of magnets and the design very diy-friendly in my eyes.
I will post some more pictures in a while but are trapped at work and the progress on the project is very low..
😀
as you imply, it wont tell you the whether its actual north or south pole 😛
it doesnt matter as long as you do it the same way all through 😉
but its only useful at the theoretical design stage
as suggested by Bentl, during actual build its practical to have a small master magnet with poles properly marked
actual polarity on finished design is determined the usual and simple way, with small a battery
but be aware that non traditional magnet design could act very different from expected
its by far not simple
What type of magnets are used ie N-S thru long side or NS on top/bottom face?
And how are the magnet poles arranged?
And how are the magnet poles arranged?
hi tmblack
North and south on the large faces, I use 50 x 12.7 x 3 mm neo magnets. Magnets placed on the perforated steel sheet in alternate rows NSNSNS etc and the alu tape over the edges of the magnets ie between the NS interface. Hope this helps.😉
North and south on the large faces, I use 50 x 12.7 x 3 mm neo magnets. Magnets placed on the perforated steel sheet in alternate rows NSNSNS etc and the alu tape over the edges of the magnets ie between the NS interface. Hope this helps.😉
Yes a big help.
I found some that are 0.500" x 2.00" x 0.125".
What is a good place to buy them in North America, I found some for under $2 for very large number?
How many magnets did you use in a pair?
Does anyone know what size of magnet Magnepan and Apogee used?
The Magneplanar is much lighter than equivalent Apogee.
I found some that are 0.500" x 2.00" x 0.125".
What is a good place to buy them in North America, I found some for under $2 for very large number?
How many magnets did you use in a pair?
Does anyone know what size of magnet Magnepan and Apogee used?
The Magneplanar is much lighter than equivalent Apogee.