Yeah, that is where his dilemna lies from what I am led to believe.
He does need to get those damn reviews of a stereo pair in action though or it all means nothing to us.
We have no spl's, response or impedence curves and all the other stuff that makes sense of what the product stands for.
We will need the reviews of at least two or three ''known'' reviewers fom ''known'' magazines or journals that can indicate performance levels both sound wise and measurement wise.😉
He does need to get those damn reviews of a stereo pair in action though or it all means nothing to us.
We have no spl's, response or impedence curves and all the other stuff that makes sense of what the product stands for.
We will need the reviews of at least two or three ''known'' reviewers fom ''known'' magazines or journals that can indicate performance levels both sound wise and measurement wise.😉
My balsa rod is ringing like a bell
Does anyone know an alternative? Maybe something with Rohacell core? But this would rule out the Planot for public applications due to the cost.
I still believe conventional L/R stereophony is not the best solution for the planot. Some of my guts tell me various arrays of L, -L, R, -R, L+R, -L-R, L-R, R-L should be tested.
Does anyone know an alternative? Maybe something with Rohacell core? But this would rule out the Planot for public applications due to the cost.
I still believe conventional L/R stereophony is not the best solution for the planot. Some of my guts tell me various arrays of L, -L, R, -R, L+R, -L-R, L-R, R-L should be tested.
Triangle shaped metal music maker ---> http://en.wikipedia.org/wiki/Triangle_(instrument) Interesting concept!
Hey el'ol, I also tried a balsa wood triangular rod attached to the positioning arm of a hard disk drive (glued and heavily modified)but not held at the top and found that the rod would resonate badly at certain frequencies.
Not only that but, there was very low sensitivity.Yes, it made sound but far from high quality even at a rough experiment as such.
I then tried a small diameter hollow carbon fiber tube. Sounded very much like just that - CARBON FIBER. It also rang at various frequencies.
Not only that but, there was very low sensitivity.Yes, it made sound but far from high quality even at a rough experiment as such.
I then tried a small diameter hollow carbon fiber tube. Sounded very much like just that - CARBON FIBER. It also rang at various frequencies.
I just stumbled on this thread today....reading it kept reminding me of this:
http://www.afrotechmods.com/cheap/hdspeakers/hdspeakers.htm
would be nice to see a 'phile version of this....
http://www.afrotechmods.com/cheap/hdspeakers/hdspeakers.htm
would be nice to see a 'phile version of this....
That's where the idea comes from no doubt. There are other you
tube videos where people have cups, rods etc. stuck to the hard drive arm to get more sound.
I have done it and it works, but not very efficiently.
I am currently making a proper set up with balsa wood triangle, two coils and magnets, bearings from hard drives and shafts(plus additional bearings) from a hobby shop.
I don't know how far EL OL got with his set up, but I do believe it will only work if the rod is correctly held at both ends with bearings as well as homing magnets on balsa bar and main return magnet mounting.
My first experiment was to just stick a 3 foot balsa bar to the top of the hard drive arm - not very efficient way of testing, but results were interesting.
So far it's cost me very little so why not give it a go?
tube videos where people have cups, rods etc. stuck to the hard drive arm to get more sound.
I have done it and it works, but not very efficiently.
I am currently making a proper set up with balsa wood triangle, two coils and magnets, bearings from hard drives and shafts(plus additional bearings) from a hobby shop.
I don't know how far EL OL got with his set up, but I do believe it will only work if the rod is correctly held at both ends with bearings as well as homing magnets on balsa bar and main return magnet mounting.
My first experiment was to just stick a 3 foot balsa bar to the top of the hard drive arm - not very efficient way of testing, but results were interesting.
So far it's cost me very little so why not give it a go?
Ziggy, could you explain to the concept to me mate? I can't seem to get my head around the triangular shape with the homing magnets....
Ziggy said:
Currently I have no plans to build a Planot SPEAKER. After finishing a more conventional project I intend to build something like a Planot organ pipe. It will work with a moving magnet drive on one end and a moving magnet pickup on the other with some negative feedback. The suspension will be the two flexible crosses described above, each resting in four pads.
Better ideas for the pickup? Do you think I can get easily bendable iron for DIY C-cores?
merajsalek, this is simply a triangular ''rod'' of about 3 foot high with 3/4 inch wide faces.
It is suspended vertically between two small ball bearing housings and a shaft runs through the bottom bearings to which 2 coils (voice coils) are attached.
These are suspended between a powerful magnetic field on each side. This is your speaker ''motor'' so to speak.
The homing magnets are placed in two spots : 1. on one side or face of the triangular rod.
2. In front of the above magnets(on the triangle face) directly opposite on a separate mount.
The idea is that the opposing magnets will attract and keep this one face of the rod at ''home''. In other words, it will keep the rod from swinging too far to the left or right in loud musical passages and when there is no or little signal, it will be at ''home position''.
Remember that we have quite a bit of inertia involved here and need some method of controlling it just like a spider and surround does in a normal speaker drivers.
I have no idea what to expect with this experiment, but do know that balsa wood can be made to wildly resonate without much effort.
I have an idea that thin corrugated card shaped in to a triangular rod and stiffened with dope may be a better material?
It is suspended vertically between two small ball bearing housings and a shaft runs through the bottom bearings to which 2 coils (voice coils) are attached.
These are suspended between a powerful magnetic field on each side. This is your speaker ''motor'' so to speak.
The homing magnets are placed in two spots : 1. on one side or face of the triangular rod.
2. In front of the above magnets(on the triangle face) directly opposite on a separate mount.
The idea is that the opposing magnets will attract and keep this one face of the rod at ''home''. In other words, it will keep the rod from swinging too far to the left or right in loud musical passages and when there is no or little signal, it will be at ''home position''.
Remember that we have quite a bit of inertia involved here and need some method of controlling it just like a spider and surround does in a normal speaker drivers.
I have no idea what to expect with this experiment, but do know that balsa wood can be made to wildly resonate without much effort.
I have an idea that thin corrugated card shaped in to a triangular rod and stiffened with dope may be a better material?
Have made the aluminium double fork voice coil holder out of 3mm aluminium bar.
PROBLEM NO.1 : 3mm is about 0.5 mm too thick for the gap in the old hard drive magnet assembly.
Solution : raise top assembly with small washers. Will do this tonight and start on the MDF housing for bearings magnets etc.
I can forsee some fiddling with alignment in this set up is going to be problematic. Lots of bits will be held together with epoxy and super glue to test the theory.
I am taking photos along the way and will post as soon as I can figure how.😕
PROBLEM NO.1 : 3mm is about 0.5 mm too thick for the gap in the old hard drive magnet assembly.
Solution : raise top assembly with small washers. Will do this tonight and start on the MDF housing for bearings magnets etc.
I can forsee some fiddling with alignment in this set up is going to be problematic. Lots of bits will be held together with epoxy and super glue to test the theory.
I am taking photos along the way and will post as soon as I can figure how.😕
My rough prototype made from mdf and salvaged hard drives is nearing completion. If it works(if I can get the whole damn thing aligned)😡 I'll post some photos.
On the subject of photos, The PLANOT WEB PAGE has a new photo of prototype 4 on the home page. Still not showing us everything........crafty.........😕
On the subject of photos, The PLANOT WEB PAGE has a new photo of prototype 4 on the home page. Still not showing us everything........crafty.........😕
Well, assuming he filed a provisional, then gets a full application in before the clock is out, his patent application should be showing up on the USPTO website pretty soon (if it hasn't already). Then you can get details.
Update : assembled all parts and glued a 1 inch x 3 foot solid balsa triangle to bearing shaft only. Still need to couple top of rod to another bearing attched to an adjustable post.
So far, I have sound eminating from the balsa rod, mdf housing. The coils coupled to the bearing shaft and bearing itself release considerable musical resonances all around itself so that even the motor housing sings as well😱
I can see that damping these resonances will be important. That's why the solid thick aluminium housing used by PLANOT makes sense. M.D.F. board at less than1/2 inch thick is far from ideal🙁
As a matter of fact, neither is the balsa wood(I think).
When the top of the rod is clamped in to a bearing and arm, the truth will reveal itself.
Tried to post photos - didn't work - still trying.
So far, I have sound eminating from the balsa rod, mdf housing. The coils coupled to the bearing shaft and bearing itself release considerable musical resonances all around itself so that even the motor housing sings as well😱
I can see that damping these resonances will be important. That's why the solid thick aluminium housing used by PLANOT makes sense. M.D.F. board at less than1/2 inch thick is far from ideal🙁
As a matter of fact, neither is the balsa wood(I think).
When the top of the rod is clamped in to a bearing and arm, the truth will reveal itself.
Tried to post photos - didn't work - still trying.
Well, it works and it doesn't. By that I mean..........it plays music at a low level. Increase that level and there are numerous rattles that I initially attributed to the balsa wood resonating. The noise I believe is coming from the main bearing (actually two in one housed in a single enclosure) and coil assembly.
It appears that the coils want to leap out of the magnet assembly😱 and are causing the bearing to scream in protest
Turn the volune down and the noise stops.
I can only conclude that for one, the use of computer
hard drive bits and pieces is far from adequate for a decent result to be expected.🙁
Secondly, even if one were to use larger purposely built voice coils and stronger/larger magnets, the need for a machinist is mandatory.
All this crap has to line up properly or you're just wasting your time.
God knows what sort of bearing PLANOT are using that doesn't protest against all that energy moving around it !!!!
Who am I to say that the concept can not be successfully employed as a new form of sound reproduction?
If it can reproduce sound with true fidelity, at what volume before things start to shake the crap out of themselves🙁 and, what does a vibrating/pivoting carbon fibre rod sound like?
We still wait for a professional review on the planot which seems to be taking for ever, even now that the latest version is finished and ready for auditioning and there has been an invite to do so for some time now in respect to other working prototypes.
From the lack of responses to this subject, I can only guess that others know better already and have seen this masquerade or claims before and are not taking this seriously?
Anyway, I have spent quite some time on this experiment with little outlay so I am not bitter. I do however want to know if this gizmo does what it claims as you MUST believe the impressive testimonials🙄
It appears that the coils want to leap out of the magnet assembly😱 and are causing the bearing to scream in protest
Turn the volune down and the noise stops.
I can only conclude that for one, the use of computer
hard drive bits and pieces is far from adequate for a decent result to be expected.🙁
Secondly, even if one were to use larger purposely built voice coils and stronger/larger magnets, the need for a machinist is mandatory.
All this crap has to line up properly or you're just wasting your time.
God knows what sort of bearing PLANOT are using that doesn't protest against all that energy moving around it !!!!
Who am I to say that the concept can not be successfully employed as a new form of sound reproduction?
If it can reproduce sound with true fidelity, at what volume before things start to shake the crap out of themselves🙁 and, what does a vibrating/pivoting carbon fibre rod sound like?
We still wait for a professional review on the planot which seems to be taking for ever, even now that the latest version is finished and ready for auditioning and there has been an invite to do so for some time now in respect to other working prototypes.
From the lack of responses to this subject, I can only guess that others know better already and have seen this masquerade or claims before and are not taking this seriously?
Anyway, I have spent quite some time on this experiment with little outlay so I am not bitter. I do however want to know if this gizmo does what it claims as you MUST believe the impressive testimonials🙄
Played around with alignments and adjustments of the voice coils last night. It's confirmed - bearing noise from this particular bearing and housing is the root of the problem😡
Then again, That kind of noise was evident when it was still mounted to the hard drive arm where it was salvaged from.
Have not given up on this yet and will gradually build a proper test unit with neo disk magnets top and bottom, plus a hand wound dual voice coil fork and a low friction high quality bearings and shaft.
Does anyone have any suggestions or advise as I am the only one posting on this thread🙁
Then again, That kind of noise was evident when it was still mounted to the hard drive arm where it was salvaged from.
Have not given up on this yet and will gradually build a proper test unit with neo disk magnets top and bottom, plus a hand wound dual voice coil fork and a low friction high quality bearings and shaft.
Does anyone have any suggestions or advise as I am the only one posting on this thread🙁
Ziggy, I for one am fascinated and find your efforts most interesting. Do you have a photo of the setup you have constructed so far?
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