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Old 10th February 2007, 05:02 AM   #21
WrineX is offline WrineX  Netherlands
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still the magnet bundles still are still expensive
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Old 10th February 2007, 05:14 AM   #22
WrineX is offline WrineX  Netherlands
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i think for the kind of money whe spend on magnets we kan build an entiry ESL. but the magnetversion will keep his DB and nver sparks
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Old 10th February 2007, 03:31 PM   #23
tinitus is offline tinitus  Europe
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Well, a pair of 8" ribbon with very powerfull neo magnets will cost about 1/10 of the cost of a pair of Fountec NeoPro5i - and it will be a true dipole ribbon

Ribbon will be a plain simple alu foil and nothing else

I reckon they will be efficient enough to be driven directly with only a small graphite resistor between amp and ribbon, and no choke needed

edit, and some filter components ofcourse
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Old 10th February 2007, 06:10 PM   #24
tinitus is offline tinitus  Europe
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UPS, I didnt see it was about ESL, thought it was only a planar magnestat, sorry
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Old 7th November 2007, 08:51 PM   #25
WrineX is offline WrineX  Netherlands
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well finally a suplier that wil give me magnats 50 x 0,9 x 0,5 mm
for 72 euro cents a piece. they are not NEO but there ok for a mid high units with a decent output look at maggies.
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Old 31st December 2008, 01:31 PM   #26
WrineX is offline WrineX  Netherlands
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pooow after not posting for almost a year, i played with them but i cant find the right amount of surfes width and height. also the right placment of the magnet is quite difficult.

by the way just putting alu foil on a wettend glass plate then carving you coil out of it an glueing the verry verry thin mylar to it works great. but now a good layout foor a small drivers 1 k and up to 20K.

anybofy has done this before or has ideas please reply willing to experiment again. got some spare time
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Old 10th January 2009, 11:46 PM   #27
WrineX is offline WrineX  Netherlands
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ok well i got some magnets coming over, there small but allot.

1500 magnets of 30mm x 5mm x 3mm

they are not verry strong so the panels are gone be pretty big. in length.

costs 3 euro and 9 euro shipping
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Old 28th January 2009, 06:49 AM   #28
boiss is offline boiss  Italy
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I,ve never heard of these speakers before, quite interesting.
It must be worth trying N50 Neodyms with pole pieces instaed of 500 not very powerful magnets. The pole pieces would probably give better control of the field too.
Good luck
Mike.
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Old 28th January 2009, 11:13 AM   #29
WrineX is offline WrineX  Netherlands
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true but expensive
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Old 28th January 2009, 03:01 PM   #30
Samppo is offline Samppo  Finland
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Interesting thread..
Been playing around with this idea as well for a long time and simulating with Femm. I think I will stick with long neo magnets, not too wide ones to get a small gap and enough turns of the foil (keep impedance up). With short magnets there will be alot of glueing, been there and don't want to do it again..
First maybe try some smaller planars, size of Apogee Stage, and if it works out make another pair and stack them

Cost of magnets is an issue though, but China has alot to offer. Has anyone tried ordering magnets from there, direct from a factory?
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