This concept - the rotational head with the bearing centre over the stylus tip - has been around for more than 20 years in Japan. 😉
They were used on a recent unipivot marketed from Malaysia/Singapore…I forget the brand, and Be Yamamura used a similar arm on his platterless (used spokes to support the record) Yamamura -Churchill TT. They worked quite well, but were often used with underhang rather than traditional overhang.
They were used on a recent unipivot marketed from Malaysia/Singapore…I forget the brand, and Be Yamamura used a similar arm on his platterless (used spokes to support the record) Yamamura -Churchill TT. They worked quite well, but were often used with underhang rather than traditional overhang.
Correct drawing:
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You put tags around the image link
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Your arm is very similar to inventor Marek Bundzel's tonearm. And he uses an effective length of 250mm. Your arm uses 228mm which is closer to conventional arms like Rega which makes it more DIY-able. You can download the specs here.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Of course, just about EVERYTHING regarding tangential pivoting arm is covered in my thread, if you want to check it out.
Hi direct driver
The tone arm principle is of course old. In my tonearm the unipivot of the main arm and the "helparms" is new (not the stock headshell). The Magnetic relief for even less friction is also new.
The length of the tone arm can be freely chosen when the other coordinates are adjusted.
The tone arm principle is of course old. In my tonearm the unipivot of the main arm and the "helparms" is new (not the stock headshell). The Magnetic relief for even less friction is also new.
The length of the tone arm can be freely chosen when the other coordinates are adjusted.
I'm glad that you are able to use a dual unipivot design because about 4 years ago I suggested in post#43 in my thread that I wrote the following regarding 4-point arms like Thales Simplicity, Van Eps, Garrard Zero 100, etc...:
Glad to see you not only use unipivot concept but also added a magnetic system to help stabilizing it. The guiding rod or "help-arm" is another unipivot which is, I assume, at the same height as the main arm, which helps to stabilize azimuth movement.
I have to say so far of all the 4-point models, the one with the cleverest bearing design at the base area is the new Thales Easy tonearm. Check out the effectiveness of it that it ONLY has to deal with horizontal movement. But it's hard to machine something like that for a DIY project though...
The other similar arm that I can think of is from the JVC Nivico "Perfect Tracking" turntable that you can see here.
Speaking of headshell, yours reminds me of headshells by RS Labs or maker of these headshells. Must be fun constructing them. 🙂
the cords of your featured tonearms are not suitable to turn in my opinion the headshell. Too much friction and not rigid!
Bearings of Simply City are very simple and precise to build and especially for the user easy to handle.
A small problem also has the Simplicity. At the beginning of the record, until the end, the applied weight change for about 0.2 grams.
The magnets of my tonearm are not intended to stabilize, but the reduction of the weight of the rest bearing. The 0.2 grams error of Simplicity can be also correct with the magnets of my tonearm.
* Here, caution should be exercised because of the support weight of the pickup!
Sorry, google translater
Bearings of Simply City are very simple and precise to build and especially for the user easy to handle.
A small problem also has the Simplicity. At the beginning of the record, until the end, the applied weight change for about 0.2 grams.
The magnets of my tonearm are not intended to stabilize, but the reduction of the weight of the rest bearing. The 0.2 grams error of Simplicity can be also correct with the magnets of my tonearm.
* Here, caution should be exercised because of the support weight of the pickup!
Sorry, google translater
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I'm curious which tonearm you are referring to. Is it the one with two strings? If that's the one, it's not my design although I admire its ingenuity.
Yes, that makes sense since the magnets attract and pulling the pivot assembly upward to reduce mass. Good idea. The two unipivot points already stabilized the azimuth plane so there's no need for that.
Please continue to tell us more about your tonearm and show more pictures!
Hi direct driver
I see you understand my arguments, that's exciting.
I do not know your design, but I refuse cords always, sorry.
A tone arm should float by tapping on the whole record, then he has little friction. A further problem is that four cables. I use very thin wire with a lot of liberty, movement! Even thinner be no more good sound. The cables are the limits for the friction, not the bearing of my tonearm. In diy tonearm or van Eps I often see very thick tonearm cable that can not be good. My tone arm has a simple magnetic anti-skating. However, the skating force is very low, because the sampling tangential. the Simplicity has a non-adjustable anti-skating.
More images I do not want to set, and why?
I see you understand my arguments, that's exciting.
I do not know your design, but I refuse cords always, sorry.
A tone arm should float by tapping on the whole record, then he has little friction. A further problem is that four cables. I use very thin wire with a lot of liberty, movement! Even thinner be no more good sound. The cables are the limits for the friction, not the bearing of my tonearm. In diy tonearm or van Eps I often see very thick tonearm cable that can not be good. My tone arm has a simple magnetic anti-skating. However, the skating force is very low, because the sampling tangential. the Simplicity has a non-adjustable anti-skating.
More images I do not want to set, and why?
Hi
I have again made a drawing with the exact coordinates in the blog. Easy to read.
I am of the opinion, who is building a Rotating headshell, the tonearm should sound better than "everyone" conven Ionele tonearm. Therefore, do not give absolutely no weak spot. Importantly, the bearings may not have the game, so with bias! The aluminum tubes must be dampened. Front about 2 - 3 cm silicone paste. This tonearm is very difficult to assemble and adjust!
I have again made a drawing with the exact coordinates in the blog. Easy to read.
I am of the opinion, who is building a Rotating headshell, the tonearm should sound better than "everyone" conven Ionele tonearm. Therefore, do not give absolutely no weak spot. Importantly, the bearings may not have the game, so with bias! The aluminum tubes must be dampened. Front about 2 - 3 cm silicone paste. This tonearm is very difficult to assemble and adjust!
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