mag-lev-turntable

[micky]

In sci.electronics.repair, on Thu, 10 Nov 2016 14:32:14 -0600, Jon Elson
<jmelson@wustl.edu> wrote:

micky wrote:


So is this for real, or a kickstarter designed to cheat me out of my
hard-earned money?

http://www.avsforum.com/mag-lev-turntable/

Brooklyn-Baltimore Guy
Oh, boy! Did you see how HIGH they levitate the platter? Geez, I have

Good point. Even if they can raise it that high, it seems it would both
conserve assets and increase reliability to just lift it a quarter inch.
Wouldn't that give all the alleged advantages and no added
disadvantages? So that makes it look like a fraud.

Parts of the video looked to me someone like it was an animation.

strong doubts it can be stable at that height. Also, the thing must have an
insanely strong external magnetic field.
.....

Brooklyn? As in Brooklyn bridge? Yup, sounds pretty appropriate, I'm very

I only gave my cities because I sent copies of the first post to some
friends, but I keep using different email addresses in different places
and one said he couldn't tell if it was from me or someone he didn't
know.

skeptical of this one. I think it probably CAN be done, but not as a
practical device, capable of operating right next to a megnetic phono
cartridge.

Jon

 

[Jeff Liebermann]

On Thu, 10 Nov 2016 14:16:07 -0500, micky <NONONOmisc07@bigfoot.com>
wrote:

So is this for real, or a kickstarter designed to cheat me out of my
hard-earned money?
http://www.avsforum.com/mag-lev-turntable/
Brooklyn-Baltimore Guy

I wonder how it will work on my old warped vinyl records?

Keeping it centered to within half a track width or less might be
difficult with the needle applying a side force which is probably not
consistent across the tone arm swing. I expect to see a levitated
tone arm in the next version.

Fighting gravity seems to be the current obsession in turntables:
<https://www.gramovox.com/pages/floating-record>


--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

 

[Jon Elson]

ohger1s@gmail.com wrote:

Just watched this video:

https://www.youtube.com/watch?v=Ky0D00iyHAA

There is a LOT of platter movement beyond the rotating moments going on
here. Check 0:42

Yup, about a 2 Hz oscillation when he plinked the platter, and it seems to
have REALLY poor damping! It just kept wobbling.

Jon

 

[isw]

In article <MPG.328fc9e35db38c9b37@news.plus.net>,
MJC <gravity@mjcoon.plus.com> wrote:

In article <da39e406-8f82-48f4-88a3-c9c74f821e7a@googlegroups.com>,
jurb6006@gmail.com says...

... There is another one out there, a vertical turntable. There are
people putting money into that as well and it is not a really good idea.
It is one hell of a novelty, as this is and if you got the money honey,
go for it. Impress your friends and enemies as well.

I'm sure a vertical turntable was marketed decades ago. I don't remember
the supposed advantage, though...

Fit better in tiny Japanese apartments.

Isaac

 

[Phil Allison]

micky wrote:

Parts of the video looked to me someone like it was an animation.

** I had the same feeling, close-ups of the patter and PU looked like CGI.

The Mag-Lev company is based in Slovenia - so likely immune from consumer fraud litigation and operating only over the net is such a warning.

If it is somehow for real, the dudes have gone to considerable trouble to make it look FAKE.



..... Phil

 

[Bruce Esquibel]

MJC <gravity@mjcoon.plus.com> wrote:

I'm sure a vertical turntable was marketed decades ago. I don't remember
the supposed advantage, though...

I still own and use one, a Mitsubishi LT-5V.

The main advantage to it, it's practically immune to rumble via outside
sources. Within reason, stick it on a wobbly table with a loose floor, jump
up and down while it's playing and, nothing.

It's not the greatest turntable ever built for other things (besides looks)
but it is good at that one thing. Up and down vibrations just don't bother
it.

-bruce
bje@ripco.com

 

[micky]

In sci.electronics.repair, on Thu, 10 Nov 2016 15:24:17 -0800 (PST),
jurb6006@gmail.com wrote:

I am not necessarily saying the people are crooks, but it is someone's pet =
project and they do expect to make money. There is another one out there, a=
vertical turntable. There are people putting money into that as well and i=
t is not a really good idea. It is one hell of a novelty, as this is and if=
you got the money honey, go for it. Impress your friends and enemies as we=
ll.

I'm still trying to get past the vertical CD holder on some computers.

My brother had a friend who told him about a "good investment". that
sounded like a really high-tech company. But its webpage was small,
only with animations and no photos, and their list of clients was almost
all prospects who hadn't signed yet.

I actually got their company address and looked at the satellite
pictures. The office was small in a little strip mall, and the work
location only had room for 3 trucks. But still, perhaps it was a
business that could grow a lot, if they could raise capital, but after a
lot of reading, it seemed all they do is dispose of the waste water from
carwashes. Sure there's a market for that, becuase of laws against
runoff, but it's not so hightech and there must be plenty competition.

My brother's friend had actually driven a couple hundred miles to look
at the plant and he invested. I wonder if he saw in person more than I
could see on the computer, or if they just took him some place and
showed him something that wasn't even theirs. At the time I posted on
another ng and someone knew of just such a scam. IIRC they went on
weekends when the real employees were not there, put up a sign before
the mark arrived and and took it down as soon as he left.

A year later, I didn't get a new list of clients but the webpage was the
very same. It's too touchy a subject to ask the friend how he made out
with his investment.

 

[micky]

In sci.electronics.repair, on Thu, 10 Nov 2016 15:33:24 -0800, John
Robertson <spam@flippers.com> wrote:

On 11/10/2016 3:24 PM, jurb6006@gmail.com wrote:
I see it as a novelty. It may well work and may be worth more than the sum of its parts but is it worth it ?

And forget DC coupling in the amp it drives. Levitated that high the magnetic fields needed to drive it will be substantial and be picked up by the cartridge. If it is three phase drive that works out to about 1.7 Hz, which is quite low. However if you buy such an expensive turntable you are likely to have an expensive phono preamp which may be DC coupled. So then you have to use some sort of filter to get that noise out.

I don't generally go for these pay before they are even built schemes. There is a reason that some company somewhere is not already doing this. What is half price ? Ten grand ?

That is why I am not in the one for Red Pataya, which is like an Arduino but supposedly more versatile, or something.

And I see no reason in having a turntable that is higher fidelity than the lathe on which the master record was cut.

I am not necessarily saying the people are crooks, but it is someone's pet project and they do expect to make money. There is another one out there, a vertical turntable. There are people putting money into that as well and it is not a really good idea. It is one hell of a novelty, as this is and if you got the money honey, go for it. Impress your friends and enemies as well.


Vertical record players have been around since at least the 1940s...
Seeburg jukeboxes all used vertical storage and play of both 78s (1940s)
and 45s right to the end - early 1990s.

Good point.

Sony used a vertical player for their CDs.

John :-#)#

 

[micky]

In sci.electronics.repair, on Fri, 11 Nov 2016 09:15:15 -0600, Mark
Storkamp <mstorkamp@yahoo.com> wrote:

And that's without putting much thought into it. But it seems they've
already exceeded their goal and have more than $400,000.

Oh yeah. So it should be on the market soon.

 

[pfjw@aol.com]

This entire discussion is fascinating!

I think that the concept is accepted in general. There is nothing particularly difficult with suspending one object over another using magnets. This has been done for years. Today, there are extremely powerful and stable magnets that make the process more easily achieved.

There is nothing particularly difficult with shielding the cartridge from the magnets. As Phil noted, with a 12W power consumption, and stable PM fields, there is not a lot of stray magnetic fields happening here.

So, what we are left with is the R&D & ergonomics required to go from prototype to production. As to scam, very possibly. But not certainly. Keeping in mind that the production of turntables these days outside of USB-based junkers is pretty much a cottage industry from small companies or tiny divisions of larger ones producing legacy devices. So, that a half-dozen Serbians might come up with a wild idea is actually somewhat touching. It is not as if Harmon-Kardon is going to buy out Jacob Rabinow, or Revox is going to turn a dozen Swiss machinist loose on the problem. This is where it will be happening.

Again, I am hooked on linear TTs. Were this device to offer that option, I would be tempted. In another forum, a gentleman is discussing upgrading his TT and throwing around 5-figure numbers (US$). So, clearly, this TT is in the sparrow-feed range for that sort of individual. And, look at the cost of a Souther arm these days.

Will it work? Too early to tell. It depends on the skills of those executing the concept.
Can it work? Clearly, yes. Hand this to the Swiss, or a couple of really good machinists and give them unlimited resources, it would be done in a month.
Would US$700,000 do it? Certainly not in Switzerland. At the Machine shop I worked in 40 years ago - absolutely. It is still extant by the way, and still very successful. Far from the dingy little building I worked in back then, today it looks like a clean room, only about two acres under roof.

By amateurs in Serbia? Who knows.

Peter Wieck
Melrose Park, PA

 

[micky]

In sci.electronics.repair, on Fri, 11 Nov 2016 09:15:15 -0600, Mark
Storkamp <mstorkamp@yahoo.com> wrote:

4) better have a UPS. You don't want that platter crashing down when the
power goes out.

From the kickstarter page:

Accidents happen, and we know that sometimes you may encounter a power
outage, so we’ve designed the turntable with a UPS system. This solution
stores enough power to safely lift the tonearm, stop the record, and
return the platter feet to resting position. This way the turntable and
your record remain in perfect condition even when the unexpected
happens.

 

[micky]

In sci.electronics.repair, on Fri, 11 Nov 2016 17:42:24 -0800, Jeff
Liebermann <jeffl@cruzio.com> wrote:

On Thu, 10 Nov 2016 14:16:07 -0500, micky <NONONOmisc07@bigfoot.com
wrote:

So is this for real, or a kickstarter designed to cheat me out of my
hard-earned money?
http://www.avsforum.com/mag-lev-turntable/
Brooklyn-Baltimore Guy

I wonder how it will work on my old warped vinyl records?

I've got a 45 I must have left in the sun, and it has waves literally an
inch and a half high, circling around the center. The needle can't come
within an inch of the troughs.

I call it a rock and roll record.

Keeping it centered to within half a track width or less might be
difficult with the needle applying a side force which is probably not
consistent across the tone arm swing. I expect to see a levitated
tone arm in the next version.

And maybe a levitated easy chair and ottoman!

Fighting gravity seems to be the current obsession in turntables:
https://www.gramovox.com/pages/floating-record

 

[MJC]

In article <o0743c$hh3$1@remote5bge0.ripco.com>, bje@ripco.com says...

I still own and use one, a Mitsubishi LT-5V.

I googled that and saw a Technics one, too. They both say they are
"linear tracking", so I guess it must be a bit like a CD/DVD mechanism.

Mike.

 

[Adrian Caspersz]

On 10/11/16 23:24, jurb6006@gmail.com wrote:

<snip>

There is

another one out there, a vertical turntable. There are people putting
money into that as well and it is not a really good idea. It is one
hell of a novelty, as this is and if you got the money honey, go for
it. Impress your friends and enemies as well.

You possibly mean this one.

The Gramovox Vertical Turntable - REVIEW
https://www.youtube.com/watch?v=kvcoci3QLEk

It's mad.

--
Adrian C

 

[micky]

In sci.electronics.repair, on Sat, 12 Nov 2016 13:05:48 +0000 (UTC),
Bruce Esquibel <bje@ripco.com> wrote:

MJC <gravity@mjcoon.plus.com> wrote:

I'm sure a vertical turntable was marketed decades ago. I don't remember
the supposed advantage, though...

I still own and use one, a Mitsubishi LT-5V.

I see one sold on ebay last year for 450.

The main advantage to it, it's practically immune to rumble via outside
sources. Within reason, stick it on a wobbly table with a loose floor, jump
up and down while it's playing and, nothing.

It's not the greatest turntable ever built for other things (besides looks)
but it is good at that one thing. Up and down vibrations just don't bother
it.

-bruce
bje@ripco.com

 

[micky]

In sci.electronics.repair, on Fri, 11 Nov 2016 23:34:16 -0800 (PST),
Phil Allison <pallison49@gmail.com> wrote:

micky wrote:



Parts of the video looked to me someone [somewhat] like it was an animation.


** I had the same feeling, close-ups of the patter and PU looked like CGI.

The Mag-Lev company is based in Slovenia - so likely immune from consumer fraud litigation and operating only over the net is such a warning.

No wonder they *all* had Slovenic (?) names.

>If it is somehow for real, the dudes have gone to considerable trouble to make it look FAKE.

Good point. Okay, that's 50,000 dollars I can use for something else.

.... Phil

 

[Phil Allison]

micky wrote:

** I had the same feeling, close-ups of the patter and PU looked like CGI.

The Mag-Lev company is based in Slovenia - so likely immune from consumer fraud litigation and operating only over the net is such a warning.

If it is somehow for real, the dudes have gone to considerable trouble to make it look FAKE.

Good point. Okay, that's 50,000 dollars I can use for something else.

** You can find vids on the net from independent people - showing a Mag-Lev TT working. It really does float 50mm above the base and it really does spin at a pretty steady pace.

There is some serious cleverness going on here.


..... Phil