Just a short comment ...
I haven't read deeper into what you are writing about in this thread now but scanning the pages it seemed as if you might be talking about e.g. how magnetic fields extend ...
I have had good experience with vizimag, www.vizimag.com, for visualizing magnetic fields.
Happy Easter 🙂 - and hope I didn't miss the point completely ...
Jesper Mønsted
I haven't read deeper into what you are writing about in this thread now but scanning the pages it seemed as if you might be talking about e.g. how magnetic fields extend ...
I have had good experience with vizimag, www.vizimag.com, for visualizing magnetic fields.
Happy Easter 🙂 - and hope I didn't miss the point completely ...
Jesper Mønsted
Tinitus ,
Your simplicity is killing me 😀 .....................................
What no more push - pull , now a curved planer ?
Gentlevoice :
Your link does not work
Your simplicity is killing me 😀 .....................................
What no more push - pull , now a curved planer ?
Gentlevoice :
Your link does not work
a.wayne said:
Curved planar ?
No, its ordinary
What you see is a "curved" poleplate
Unfortunately its not simple at all, but quite tricky
And its only to angle the magnets by a few degree
May not be woth the effort
I have also considered to use stronger magnets for the middle row
Have strong magnets relatively close together may also cause issues
No push-pull ?
I have considered the compromises
Pushpull is only good fore low mids/midbass
Even if pushpull Xmax should still be limited, so no bass
So I thought why not just do a midrange/tweet planar
I believe the use of 3 rows of magnets is optimal
Its not too wide, so should handle high frequencies quite well
Andwith the right magnet orientation theres no need fore "passive" signal return wire
But right now, I focus on the Rubanoide 🙂
@ a.wayne
- No I can imagine that it doesn't work - I can see that the link has a dot at the end - guess that's why.
The link is www.vizimag.com and the reason why I find this software useful is that to me it is quite intuitive and straightforward to use. It took me about a couple of hours playing with it and then I could use it to visualize magnetic fields etc.
Also, there's a trial version and purchase price is about $40.
Greetings from Denmark,
Jesper
- No I can imagine that it doesn't work - I can see that the link has a dot at the end - guess that's why.
The link is www.vizimag.com and the reason why I find this software useful is that to me it is quite intuitive and straightforward to use. It took me about a couple of hours playing with it and then I could use it to visualize magnetic fields etc.
Also, there's a trial version and purchase price is about $40.
Greetings from Denmark,
Jesper
@tinitus
Hi,
I've attached an image of a file that I saved while finding out how the program works. The strength of the field lines is displayed while taking the mouse over the lines or may be displayed with various colours as well.
I'm currently gathering solutions to "challenges" that I already know I will run into - vizimag is one of the solutions because - to me - it is quite simple to work with and I don't need a 100% correct calculations.
The actual development period is yet to come ...
Best,
Jesper
Hi,
I've attached an image of a file that I saved while finding out how the program works. The strength of the field lines is displayed while taking the mouse over the lines or may be displayed with various colours as well.
I'm currently gathering solutions to "challenges" that I already know I will run into - vizimag is one of the solutions because - to me - it is quite simple to work with and I don't need a 100% correct calculations.
The actual development period is yet to come ...
Best,
Jesper
Attachments
That looks doable
I have worked with angled magnets before, and it seems to have some benefits
But it also complicates construction
One point I consider important is about the surface attached to the iron
I believe it will be good practise to have as big surface as possible against the iron
And to have the slim side against the gap
Such magnets are magnetised through the thickness, and are much easier to find
Without having simmed it, I believe it will concentrate the field better in the gap
I have worked with angled magnets before, and it seems to have some benefits
But it also complicates construction
One point I consider important is about the surface attached to the iron
I believe it will be good practise to have as big surface as possible against the iron
And to have the slim side against the gap
Such magnets are magnetised through the thickness, and are much easier to find
Without having simmed it, I believe it will concentrate the field better in the gap
Hi.
Now i will make a planarspeaker as in post 490.
A kind of push pull planar with neodymnium magnets 6x10x70mm.
Now i will make a planarspeaker as in post 490.
A kind of push pull planar with neodymnium magnets 6x10x70mm.
An externally hosted image should be here but it was not working when we last tested it.
Last edited:
Bandsei which camera did you use to take the photograph of your planar speaker? My camera is very poor and I have many photos to take of my full range planar speakers (8+) pairs I have already built and I am upgrading several pairs as well. Looking at your photo I don't think it will be very sensitive, and will take a lot of watts to get a high volume. The gaps between the magnets is too large in my experience. Thank you Jamesbos.
How do you attach photos to your replies had a look on the forum but can't find any help! My memory is not as good and I have forgotten. Thanks Jamesbos
Hi Henry
I am using A Sony W 150.Not a expensive camera.
I use Imageshack to upload pictures, chooses to "resize image" to 800x600 (15" monitor)
http://http://www.imageshack.us/
A closeup of the membrane.If you look closer you see that there is 2 membranes .
I am using A Sony W 150.Not a expensive camera.
An externally hosted image should be here but it was not working when we last tested it.
I use Imageshack to upload pictures, chooses to "resize image" to 800x600 (15" monitor)
http://http://www.imageshack.us/
A closeup of the membrane.If you look closer you see that there is 2 membranes .
I can report to have had a very nice listen to Båndseis new creation, one of many
Sounded real good
Now still only one diaphragm
It happens every time I hear his things, I need one
Well, I have had 18 neo magnets fore some time
Couldnt decide what to do with them
But I think it will be like this
Planar/ribbon hybrid, loose at top and bottom
200mm height and 50mm wide
Horisontal serpentine leads
Horisontal magnets mounted with wood in between
Heavy steel plate on the back
No need fore any glue
Should be very easy to build
My magnet are magnetised through the side, which makes them perfect fore this design
May not be easy to find, but any 1/2" x 1/2" x 1.5" should be easy enough
Actually, the hardest part of building these things are to maintain 100% correct magnet polarity
Sounded real good
Now still only one diaphragm
It happens every time I hear his things, I need one
Well, I have had 18 neo magnets fore some time
Couldnt decide what to do with them
But I think it will be like this
Planar/ribbon hybrid, loose at top and bottom
200mm height and 50mm wide
Horisontal serpentine leads
Horisontal magnets mounted with wood in between
Heavy steel plate on the back
No need fore any glue
Should be very easy to build
My magnet are magnetised through the side, which makes them perfect fore this design
May not be easy to find, but any 1/2" x 1/2" x 1.5" should be easy enough
Actually, the hardest part of building these things are to maintain 100% correct magnet polarity
Attachments
Last edited:
Bump
Well, its just a posting check I do for Jason
Tho, I consider to have thin copper on both sides of magnets
Dont know what it wil do
cheers
🙂
Well, its just a posting check I do for Jason
Tho, I consider to have thin copper on both sides of magnets
Dont know what it wil do
cheers
🙂
Attachments
Last edited:
Fooling around with magnets and copper 🙂
And how the copper seem to influence magnet field
This is interesting because only the flat part of the field is wanted
The part of the field that goes outwards is not wanted as it will make the diaphragm move sidewards
And how the copper seem to influence magnet field
This is interesting because only the flat part of the field is wanted
The part of the field that goes outwards is not wanted as it will make the diaphragm move sidewards
Attachments
Last edited:
That is fascinating stuff. I will follow it up.
One of the best sounds i heard was an Appogee Duetta in a very big room.
I was sitting maybe 5 meters away and still the soundstage was extremely focussed. Linesources can be very good in the farfield.
One of the best sounds i heard was an Appogee Duetta in a very big room.
I was sitting maybe 5 meters away and still the soundstage was extremely focussed. Linesources can be very good in the farfield.