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Old 25th September 2010, 09:54 AM   #61
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i used 740 magnets for a pair. I get my magnets from China it works out cheaper if you buy 1000.All the other sites are dearer. Go to posting 41 for the pictures of my push pull full range planar. The 6mm and 3mm design is no louder than the 3mm 3mm design.So I will build a 6mm 6mm design to see if that is better. Got to cut the MDF glad the weather is better. $2 is very dear compared to China
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Last edited by JAMESBOS; 25th September 2010 at 09:56 AM.
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Old 28th September 2010, 03:46 AM   #62
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Which magnet supplier did you use? i am very interested in this project. have you made any sound measurments of your planar?
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Old 5th October 2010, 03:11 PM   #63
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Default chinese magnets

Send your enquiry to this email address helen@ndmagnets.com She will give you all the details
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Last edited by JAMESBOS; 5th October 2010 at 03:12 PM. Reason: incomplete
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Old 5th October 2010, 03:14 PM   #64
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The main measurements I do are by ear, although I have used a sound level meter in the past.
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Old 5th October 2010, 07:18 PM   #65
tmblack is offline tmblack  United Kingdom
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Has anyone tried paper or silk instead of mylar sheet material?
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Old 22nd October 2010, 03:25 PM   #66
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Hi bentl
I have just got 4 rolls of alutape from CPC.When i messure 5 meters i get 0.6 ohm.That´s app. 0,1 ohms /meter.
Any progress in your planar?Have you tried to messure your tape?

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Old 22nd October 2010, 09:26 PM   #67
bentl is offline bentl  Norway
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Hi,

No - have not made much progress yet due to heavy workload.
Did actually spend one hour in the the workshop this evening and got the diaphragm and tape in place

Will try to connect the conductors tomorrow and make it play!

I have not measured the tape. I aquired it by recommendation of an other forum member who have the measurements. But I am more interested in the sound than the resistance
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Old 23rd October 2010, 01:04 PM   #68
Baldin is offline Baldin  Denmark
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A bit slow here Alutape from CPC .... don't know CPC, any link?
Is it the kind of tape uses for alarms on windows etc?
0,1 ohm per meter seems quite low. How thick (and wide) is the alu?

Kind regards Baldin
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Old 23rd October 2010, 01:42 PM   #69
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It is app. 30my but seems to have lower resistance than the one i had.
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The tape is 9mm wide.
For my new speaker i will split it to 3 mm.
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Old 23rd October 2010, 04:04 PM   #70
svenny is offline svenny  Canada
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What is the lowest frequency you expect to get?
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