2. analog
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LP12- Power Supply- Need education

I have read a lot about different options to upgrade the analogue power supply.
A phono stage need to amplify micro signal would require very good power supply to ensure there is minimal noise interfere with the signal.
I read about Lingo and other power supply articles, however they never mentioned about the science behind it.
How could a power supply powering a motor will introduce noise to the cartridge especially belt drive?
How do you measure the noise when playing a record?
Or would  the power supply provide a more stable rotational speed, my speed measurement on the turntable shows very consistence rpm once it is playing?
I really do not understand why a Lingo power supply cost so much but cannot provide an improvement with a measurable results.
Could someone educate me.
msnpassion
daveyf's avatar
daveyf
3,086 posts
 
@mijostyn,    Since you just posted that the last time you owned an LP12 was in 1980...I think that tells us all we need to know. 
“There is no way to set up a LP12 correctly”...i’m sure back in 1980 that was your experience. LMAO.


”I have not played with a recent one”....but that doesn’t stop you from bringing us your two cents worth...right!
Quit being a troll and go to another thread.
lewm
13,787 posts
 
Mijo, With due respect, I think the old problem with the SOTA Sapphire was that the motor was mounted on a stationary platform while the platter, of course, was suspended.  When the suspension was activated, that caused the belt to stretch and contract in time with the bounce.  This resulted inevitably in speed instability that was quite noticeable.  In fairness to SOTA, I heard or read they solved that problem a while back.  DC motor would not be as good as their latest Eclipse option, the one that incorporates the PE technology, which works on AC synchronous.
bdp24's avatar
bdp24
10,287 posts
 

@lewm, lots of other tables have had their motors mounted on a stationary platform and their platters suspended: the Acoustic Research, Thorens 125/150/etc, Oracle, VPI HW-19, and of course the Linn Sondek itself. Did the old Sapphire have the slow-acting servo-control speed-correction that was clearly audible?

The new SOTA/Phoenix Engineering combination motor/power supply/tachometer is a dedicated, 3-phase DC motor design. Honest! SOTA is offering a version for use in VPI tables, the DC motor replacing the stock Hurst AC motor. PE’s Bill Carlin is adamant that a properly designed DC motor is far better than an AC: less noise and vibration, more torque and "drive".

saburo
59 posts
 
There is, as usual, a ton of misinformation and pure ’BS’ being foisted by those who really have absolutely no clue about the sound of a well set up Linn LP12.
I love this from mijostyn...’listen to a Linn platter, you will be able to pick up radio stations’..ridiculous!

The Dunning Kruger effect is alive and well on this thread and A’gon in general. I pity the OP that was looking for info on the LP12 and then watch his thread devolve into a discourse on why Linn’s are a POS. unbelievable.

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