Curved magnetostatic speaker - Page 2

båndsei · 21st December 2008, 12:20 PM

My diaphram messures 120x980mm. and is made of alufolie witch paper in DK. it is used to ¨store food in.Thickness of alu is 0.007mm. + the paper.I cut it into coils of 8mm.wide. I use 11 meters to make a diaphram and the Resistance is 5 ohm.The tape is from 3M called microporre and for helth care.I cut it to coils of 3mm. wide.

jzagaja · 27th December 2008, 11:35 AM

Hi there Båndsei,

Has 3m Microporre adhesive on both sides? I think we can coat it with conductive glue 0.01 Ohm per cm can we?

båndsei · 1st January 2009, 04:46 PM

Microporre has only adhedsive on one side,and i dont think it is better to use conductive glue.

Ed Holland · 5th January 2009, 09:26 PM

Hi båndsei

That really is some very nice design work and high quality construction. What frequency coverage is typical from these devices? Also, how is the polar dispersion in comparison to a flat panel?

Thank for sharing this project with us,

Cheers

Ed

båndsei · 11th January 2009, 06:13 PM

My curved planarspeaker has not been tested,but i think it goes from 150 hz to 18000 hz. maybe 20000 hz.I will try to build a new one 21x80 cm. and try to curve it horisontal too.To curve it horisontally,i dont get the "hot spot".

båndsei · 25th January 2009, 03:21 PM

Here is a picture of my curved planar speaker.I have curved it horisontally too.

jzagaja · 25th January 2009, 03:29 PM

Awesome! Are you using shellac veneer? If it could goes down to 50Hz

, imagine completely curved magnetostat in which back wave is transmitted through tapered quarter wave waveguide and every part is steerable so that you can change directivity if necessary.

jzagaja · 26th January 2009, 06:36 AM

Magnets are placed vertically or horizontally?

båndsei · 26th January 2009, 02:33 PM

Here is a picture from behind,magnets are mounted vertically on 5x10mm.iron.

a.wayne · 31st January 2009, 12:01 AM

Roger Sanders , say's to stay away from curved Panels ....

http://www.youtube.com/watch?v=Vdf3V...eature=related

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21st December 2008, 12:20 PM	#11
båndsei diyAudio Member Join Date: Dec 2008	My diaphram messures 120x980mm. and is made of alufolie witch paper in DK. it is used to ¨store food in.Thickness of alu is 0.007mm. + the paper.I cut it into coils of 8mm.wide. I use 11 meters to make a diaphram and the Resistance is 5 ohm.The tape is from 3M called microporre and for helth care.I cut it to coils of 3mm. wide.

27th December 2008, 11:35 AM	#12
jzagaja diyAudio Member Join Date: Jun 2004 Location: Szczecin	Hi there Båndsei, Has 3m Microporre adhesive on both sides? I think we can coat it with conductive glue 0.01 Ohm per cm can we?

1st January 2009, 04:46 PM	#13
båndsei diyAudio Member Join Date: Dec 2008	Microporre has only adhedsive on one side,and i dont think it is better to use conductive glue.

5th January 2009, 09:26 PM	#14
Ed Holland diyAudio Member Join Date: Dec 2004 Location: Mountain View, California	Hi båndsei That really is some very nice design work and high quality construction. What frequency coverage is typical from these devices? Also, how is the polar dispersion in comparison to a flat panel? Thank for sharing this project with us, Cheers Ed

11th January 2009, 06:13 PM	#15
båndsei diyAudio Member Join Date: Dec 2008	My curved planarspeaker has not been tested,but i think it goes from 150 hz to 18000 hz. maybe 20000 hz.I will try to build a new one 21x80 cm. and try to curve it horisontal too.To curve it horisontally,i dont get the "hot spot".

25th January 2009, 03:21 PM	#16
båndsei diyAudio Member Join Date: Dec 2008	Here is a picture of my curved planar speaker.I have curved it horisontally too.

25th January 2009, 03:29 PM	#17
jzagaja diyAudio Member Join Date: Jun 2004 Location: Szczecin	Awesome! Are you using shellac veneer? If it could goes down to 50Hz , imagine completely curved magnetostat in which back wave is transmitted through tapered quarter wave waveguide and every part is steerable so that you can change directivity if necessary.

26th January 2009, 06:36 AM	#18
jzagaja diyAudio Member Join Date: Jun 2004 Location: Szczecin	Magnets are placed vertically or horizontally?

26th January 2009, 02:33 PM	#19
båndsei diyAudio Member Join Date: Dec 2008	Here is a picture from behind,magnets are mounted vertically on 5x10mm.iron.

31st January 2009, 12:01 AM	#20
a.wayne diyAudio Member Join Date: May 2008 Location: Front Row Center	Roger Sanders , say's to stay away from curved Panels .... http://www.youtube.com/watch?v=Vdf3V...eature=related