2020 update : JC Verdier La Platine


A recent encounter with a JC Verdier dealer as well as a recent Audiogon discussion thread led to the start of this thread. He was in my house updating my La Platine which had been in storage for ten years with thread and oil. While he has high regards for the deck, his newer clients nevertheless prefer a Techdas iii than an 'old' La Platine. Given the proliferation of expensive decks in the past dozen years, La Platine has become very much under-appreciated. 

It's clear to me that the influence of the La Platine is everywhere to be found. Specifically, the magnetic suspension system that was employed 30+ years ago. Even SOTA offers their newer decks with mag. lev. features. And if you read this review: https://www.callas-audio.nl/Callas%20Platine%20Mod%20Kit%20Review.pdf, the Continuum Caliburn uses the same concept, which was not acknowledged in Fremer's review, albeit with more sophisticated , and expensive, execution.

It is also clear to me that there is much misunderstanding of the workings of the La Platine. I for one have contributed to this. The motor of the La Platine, for example, has been much maligned. The thread drive is another aspect of the turntable that have been described as inferior. With regard to the motor and thread drive, I have been set straight by Chris @ct0517 and Lyubomir @lbelchev. Experimenting with the different types of silk threads, the tightness to the platter  and a renewed understanding of the soundness of the Philips motor have been rewarded with better dynamics and transparency. 

The funny thing is that during the past two years of re-engagement with audio, I have questioned ownership of every components in my arsenal except the La Platine. It has always been a keeper. I wonder if La Platine owners would contribute to celebrating this 'old' deck with tales, advice, and insights?

Cheers!
ledoux1238
@thekong

While the quality of the three phase drive in the Techdas is certainly very good, a three phase drive utilizing a generator and three amplifiers is very common. Virtually every DD TT has this architecture, going way back to the 80s. Some of these, of course, are pretty rudimentary 

The prime reason for using a 3 phase motor is that, properly built and driven, it delivers virtually linear torque.  This because of the overlapping nature of three phases separated by 120 degrees. In contrast a 2 phase motor does not produce linear torque This is why they are common in belt and thread drives, where the torque peturbulations are at least partially reduced by the drive decoupling. They also cost less. 

Note, cogging due to stator pole piece design is a separate issue. This can be eliminated where slotless/coreless designs are used. 

@richardkrebs , thank you for the information! In such case, maybe it would be interesting to use one of those DD motors for BD? 

 

@thekong.

I have read reports of people using a DD motor to drive a platter via a belt or thread. You would need to be careful in selecting a motor that can spin up the heavy LaPlantine platter, but replacing the centre spindle with a pully could do the trick. There would also be bearing side load issues in the donor DD motor to consider  Surely there are off the shelf three phase motors and controllers out there that could be used?

 

@thekong Thank you for the list of prestigious TT  using dual AC motor controlier, 

@richardkrebs Thank you for that simple explanation of the three phase motor. If executed correctly, surely a motor with 'phase concellation' to achieve vitual linear torque is very desirable. Notwithstanding the various motors using generators and amplifiers, your explanation has led me to seriously consider the three phase ac Condor motor by SOTA. 

@thekong 

i was browsing WBF and came upon an exchange between you and @mtemur . There was a change in shaft size during 2010 for the La Platine. And you had written to the new owner of Verdier to inquire about getting the new shaft part. Did you ever hear back? …Just curious.