Hi A.Wayne
helper magnets idea came from guys at e-magnets.co.uk, they suggested to close the magnetic path between two steel bars (distance setting, so eg. 40mm wide ribbon between 10mm thick neos will require 60mm thick stack of helper neo's) with a stack of magnets as they will help to alleviate field strength drop in the middle of the ribbon length. In effect additional field off helper magnets will add to the field, observe the polarity thou, it has to be reversed in relation to front magnets! I will post a picture tomorrow.
Peter
helper magnets idea came from guys at e-magnets.co.uk, they suggested to close the magnetic path between two steel bars (distance setting, so eg. 40mm wide ribbon between 10mm thick neos will require 60mm thick stack of helper neo's) with a stack of magnets as they will help to alleviate field strength drop in the middle of the ribbon length. In effect additional field off helper magnets will add to the field, observe the polarity thou, it has to be reversed in relation to front magnets! I will post a picture tomorrow.
Peter
Well actually, for 40mm ribbon I only need a stack of 6 x10mm thick magnets in any shape, disc, square whatever, I just used some leftover and cracked ones. Besides neos are not going to saturate like steel so you can use less I suppose. Correct me if I'm wrong, I'm sure somebody else tried it before me.
pure gold ribbon. 20mm*170mm 10 ohm. I guess the gold i thin.
Do you know the thickness of the god leaf? Is the gold leaf stronger than aluminium leaf? Does your gold ribbon sound better than an Al ribbon?
I am asking because yesterday night I tested a 0.8 micron flat ribbon (12mm * 200mm) without backing paper or mylar. I had to wear a breathing mask not to destroy it during the installation. Sounded awesome. Most extended FR (> 40KHz) and lowest distortions I measured so far.
Bruno
pure gold ribbon. 20mm*170mm 10 ohm. I guess the gold i thin
How did you get such a long continuous length without seams? The largest leaf I've found has been 6"x6" squares assembled into rolls with small overlaps.
Cheers,
J
you don't
seams there are
but thats the clever thing with this material
seams are not visible
or you might say that it bonds together so tightly that there are no seams left
probably because its so exstremely thin
it is almost too thin, it is the metal that can be thinnest. you can see light through.It is too difficult to work with. Aluminum is better, and obviously much cheaper.
Beautiful craftsmanship!
Has anyone been able to find somewhere to buy aluminum magnet wire? I've been building some planar speakers using copper wire. I'd love to switch to aluminum but I can't find enamel covered aluminum anywhere.
Cheers,
Jason
.5 mm enamelled coloured aluminium wire @wires.co.uk internet only special offers, coloured craft wires, 15 metres .80 pence.
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.