Hi ChrisMy 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
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.
The same, i dont have time for discussion.I just had a glance at this thread and wanna say the DIY going on here is awesome! Good and impressive work
great regards
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?
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?
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
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
That is not correct.I unfortunately do not understand. higher amplitude why? With normal speaker chassis, the size has no influence on the bass reproduction
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
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