A DIY Ribbon Speaker of a different Kind

[peril]

Müdsen auch nicht alles lesen. Ich habe das ganzen Thema mindestens 3 mal durch gearbeitet 😆

 

[ChrisABC]

My first post on this thread. (I've only read pages 73 -50)
I found this (@ 4 minutes flat coil winding)

Would magnetic kitchen knife holders work?

Thank You

 

[ppap64]

My first post on this thread. (I've only read pages 73 -50)
I found this (@ 4 minutes flat coil winding)

Would magnetic kitchen knife holders work?
View attachment 1064056

Thank You

Hi Chris
The original design by M.Deminiere used vertical stacks of neodymium magnets, each
measuring 30mm W x 30mm L x 10mm Thick.....you literally cannot pull a pair of them apart
with fingers, need some kind of jig to pry off the block stack.
You need this kind of force to accelerate the voicecoil/diaphragm, the little kitchen knife holder
would make a weak motor.
The polarity of the two magnet horseshoes also needs to be N/S not N/N.

 

[peril]

Hi, i am at work, very hard.
no time vor discusion.
regards

 

[peril]

I just had a glance at this thread and wanna say the DIY going on here is awesome! Good and impressive work

The same, i dont have time for discussion.
great regards

 

[Zuluroot]

To : sergiu2009

did you ever document or make a video ove howto make a : alu foil coil manual cutting process.

 

[sergiu2009]

Hi Zulu,
Nope. I consider it a very delicate process.... It took me alloooot of time to master it to not cut through the paper..... I have no pics nor docs with it. Sorry.
Cheers
Sergiu

 

[wollie]

I have three different Lineaum,s including an LS 1000 and I am very satisfied with it,so I'm not going to build myself for the time being,😀😀😀

Regards Wollie

 

[peril]

www.youtube.com/@TheodorImfeld

 

[WrineX]

Nice!

 

[resets]

@ all Rubanoid builders,

what kinde of Magnets are you using N35, N42/45 or N52

Many thanks

 

[peril]

Hello
Does anyone know the thickness of a Linaeum 1000 speaker membrane? couldn't find any information with google. I got some tedlar, that's why I'm asking. Thanks

 

[Sparrowlegs]

I'm unsure if I have the strength to get back into this game however after a few years hiatus, I think I own a few people an apology and more - Ti Jerry.

We all know that the Rubanoide is old tech (1920s) but with the aid of Finite software, cheap computing and AI, this is what can be achieved in the 21st century!

What do you think?

 

[peril]

Hello
I have two more questions about the rubanoid.
1 question
Copper caps are often used in broadband chassis. Now I have dismantled such a chassis and discovered that the copper cap does not conduct electricity to the pole plate. Is this absolutely necessary?
2 question
What is the physical reason that longer membranes of the rubanoid can reproduce lower frequencies than shorter ones?
I would be very happy about replies.
greetings

 

[havun]

peril​

Longer membranes have a larger vibration amplitude, which is why they sound lower frequencies.

 

[peril]

I unfortunately do not understand. higher amplitude why? With normal speaker chassis, the size has no influence on the bass reproduction

 

[peril]

was hoping that my two questions could be answered. There are some very smart people in this forum, or am I just thinking that? greetings

 

[Rob Dingen]

I unfortunately do not understand. higher amplitude why? With normal speaker chassis, the size has no influence on the bass reproduction

That is not correct.
You have to move an amount of air to reach a low frequency and SPL.
A small woofer can go low but with low spl.
With the rubanoide a larger membrane can deliver more SPL or go lower with the same SPL then a smaler membrane.
As for the copper cap's it's not necessary to make it work but some people say it sounds better, so it's up to you.

Rob

 

[peril]

It's clear to me what you're writing. Larger rubanoids go deeper, but why? You're just listing certain facts without explanation. The normal chassis, if they are small, move less air, is a matter of course.

 

[solhaga]

Figure out the equivalent cone area then use this calculator.