The magnet replacement is really a rarity. Did you replace both the top and bottom magnets? How did you attached the magnets to the aluminum platter? How did you remove the magnets from the platter to begin with? Can you post some pictures?
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!
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!
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- 537 posts total
hi @ledoux1238 yeah it was a big deal for me. i replaced both. it just got so easy when i find them online and the post was so quick. i imagined glue and all sorts of things. not the case.
the magnets that came in the "collars" had an outer dia of 185 and inner dia of 95 mm (20 mm thick). the magnets couple to the steel "collars". to remove the old ones was easier. less powerful. somehow i could lever with a cloth and screwdriver and up they would come. i needed the cloth less i fracture the ferrite.
installing the new ones which are Y30 ferrite and 180 mm OD and 100 mm ID (20 mm thick) was tricky because very difficult to remove once in the collar. very strong. nothing much to grab once they are flat on collar. i put a magnet in wrong (opposite polarity). to remove it was very tricky. i ended up using wideset long handle pliers and a soft cloth. you just need to get an edge up. adjusting position also very tricky but very necessary to optimise wobble. also more powerful magnets made it very tricky to assemble the la platine. that is putting on top platter assembly, now more powerful magnets will push the bottom assembly out of alignment unless i am very careful.
i have got a factory in china now making me another 2 sets of magnets but these will be Y35 ferrite which is stronger and longer lasting. i anticipate it will be about 25% stronger and also will have dimensions of 190 mm OD and 89 mm ID so as long as i can get them in, i will really have better magnet coverage in the collar and stronger magnets hence more repulsion in aggregate.
it is dubious whether more repulsion will do anything good for me. i mean alot of people run the platter just resting on the ball so does it matter if there is a 1 mm gap versus a 10 mm gap versus 20 mm? i guess the way i see it is i don't anticipate an impact on stability from less bearing being in top platter assembly but i think we could have less noise and less friction.
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I just did a quick online search, and Y30 or Y35 ferrite magnet discs of varying dimensions are readily available! Regarding the strength of the magnets , a Dutch audio dealer, Callas Audio, came out with a limited addition mod kit for the La Platine. It could varying the amount of magnetic force. The result of which is better bass response. Some user would use the ball as a corrective against the magnetic force.
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the platter is attached to a steel collar below and it is that to which the magnet affixes.
the callas mod was all about being able to fine tune location of bearing (vertically). with the granito i have that adjustment via a bolt beneath the table. just need long spanners to get to it (size 17).
belts arrived today. i can't get the platine to spin slow enough now (HA!). but of course this is simply highlighting that i haven't the correct lubricant. i am using a very light synthetic lubricant. it is too light. as per JC Verdier's design i will now use ROCOL X5 Ultraglide. This will create a little resistance which will mean i will come into a better place for achieving speeds i need but also the drag obviates stylus drag as per Verdier's design. i wouldn't be surprised if it makes it a little quieter too as i think it will be slightly dampening.
transrotor belt is skinniest. gold ring is a mm or 2 thicker. ebay EPDM belt is grossly thick. they all seem to achieve the same results at this stage. Wow no better than 0.04 rms. speed variation down a little but still about 0.15 rpm absolute. hope to improve both these numbers with the right lube. i have 5 kg coming so if anyone needs some, please reach out (or if anyone needs magnets). |
@ledoux1238 i must admit i have trouble working out how armco telar 57 lines up with Y30/Y35. i will say though that Y30 even in the size is used (which is smaller than what could fit in collar) has enough magnetic force to do the job even with my additional 3 kg on there (weight and SDP thing). having said that, i am keen to try Y35 as more float is something i'd like to see.
based on installing Y30 - even more force will be difficult to manage. i don't imagine that JC Verdier design needs much more than Y30 based on my experience. it seems a good match for the original. i had heard from the gentleman i bought my table from that the original magnets came from Focal drivers (a 38 cm driver from the 70s as i recall?). |
- 537 posts total