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Old 20th February 2007, 11:08 PM   #21
cowanrg is offline cowanrg  United States
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500 magnets for the pair? if the magnets are 50mm x 12mm, wouldnt 250 (per side) cover an area of 15,000 square centimeters? im not sure how you are coming up with 500 magnets. did you mean 50?
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Old 20th February 2007, 11:47 PM   #22
gl is offline gl  United States
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OK, 50mm = 5.0cm and 12mm = 1.2cm. So 5.0cm * 1.2cm = 6.0cm^2. Now 6.0cm^2. * 250 = 1500cm^2. This is 1.0m by 15cm or approximately 40" by 6" give or take.

Sounds like it's in the ballpark.

Cheers,
Graeme
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Old 21st February 2007, 08:26 AM   #23
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Thank you ql, as you showed you divide by 100 not 10, as I have built the speakers in question I should know how many magnets I used!!! Thanking you again. Regards Anthony.
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Old 25th December 2008, 11:21 PM   #24
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Default Full Range Planar by JamesBos

Hi to all, I'm a newbie. I hope that I'm posting this correctly. Seems
like it's a little different from other forums I've visited. JamesBos,
I am interested in the Full range planar that is very simple to
build. Can you tell me if the magnets are placed vertically or
horizontally on the perforated metal sheet? Is there a place to
see the pictures you are talking about? I noticed that you gave
instructions to go to tubes. Is that You Tube? I cannot e-mail you
because I'm a newbie. It's great that the moderators run a tight
ship and protect us. I will await your post and happiness always,
Klipschorn dude
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Old 26th December 2008, 03:05 AM   #25
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Klipschorn dude, Welcome to diyAudio

try this link and look up post # 1458

http://www.diyaudio.com/forums/showt...41#post1123941

That should give you an idea of what's going on -

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Old 26th December 2008, 09:36 AM   #26
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Hi, welcome, you can put the magnets on horizontal or vertical, I have tried both. It is easier to put them on vertically as the aluminium tape is easier to put on the membrane, not so many turns which is the hardest bit. This is the place you can easily rip the thin aluminium tape. If you do you have to start again. Hard on patience and the back! The tubes in question are on this forum one of the many sub sections, explore and learn! They are worth the effort and are easy to maintain . The dearest part are the magnets but they last for many years. The sound is very open and clean no boom or tizz. I have got a pair of 4' x 2' with neos hanging from the ceiling very light and thin about 3".Very easy to place in the room. I have built a pair 2' x 2' full range even easier to hang off the ceiling and out of the way.
Feel free to ask any questions and send email if so inclined.
Happy new year Anthony.
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Old 28th December 2008, 10:08 PM   #27
WrineX is offline WrineX  Netherlands
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what tape dit you used ? the aluminium stuff, is it from 3m ? or can i order it somewhere?
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Old 28th December 2008, 11:51 PM   #28
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You can order it from CPC CO UK it is the tape used for burglar alarms security tape No. SR00001 it comes in a 9 metre roll. Regards Anthony.
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Old 29th December 2008, 07:25 AM   #29
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Default Planar Speaker

Hello C2CThomas. Thanks for the info on the pics.
I'm looking into building the planar speaker that JamesBos was
talking about. Sure are some nice friendly folks on this forum.
Happiness always,
Klipschorn dude
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Old 29th December 2008, 07:25 AM   #30
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Default Planar Speaker

Thanks JamesBos. I will see if I have enough magnets on hand
already. Like you said, that's the most expensive part. Thanks for
telling me what "tubes" was. I most definitely will explore this site.
Nice people live here.
Klipschorn dude
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