2020 update : JC Verdier La Platine

@ledoux1238 There is a Thread on this forum that made a reference to the LDA.

The use of the device is to have it receiving the Input Power from the Power Cord and the output from the device will connect to the TT's IEC Power Cord Connector, hence supplying the TT with a improved power upply.

The first time I ever heard it in use was as a prototype, on a system that has a substantial purchase value, and the Idler Drive and Belt Drive it was used with showed substantial improvements.

Later down the line I had a loan of the final design for a few months, and put it to use in other systems and against other Speed Controllers the LDA was the preferred device being made known by all attendees at the arranged demonstrations.  

On a UK forum there were also reports being made where it was stated attaching this device to CDP's or CDT's ? had a very noticeable effect for the better as well. 

@dover Thank you for the primer of AC motor. Going down this route in search of an upgraded motor would really require quite a bit of research, certainly not a plug and play option. Just a quick search on ebay on ac motors turned up various vintage models. Quite bewildering! I will report back.

@pindac I reached out to Nick, though I am quite out of my depth here. The LDA is not a drop-in solution vis-a-vis the existing Verdier Motor / controller. Modifications will have to be preformed to the existing or coupled to a new ac motor?

It has been quite an interesting turn of discussion. @phantom_av This line of discussion may not have been what you were looking for, but certainly food for thought. It was certainly for me. Thanks all!

@ledoux1238 You have done the correct thing in contacting Nick Gorman, he is with knowledge levels that are beyond many EE's, if there is a method and a simplified one available Nick will see it.  

As for being out of your depth, nearly all that I own is bespoke built by EE's and Engineers who excel in certain disciplines within HiFi, this is where the two edge sword swings.

When the sword swings one way, I am most confused by what is under discussion, as a proportion of the methods employed are unique to the individual, with an area of the work to be being undertaken, being unique and their own stamp on a design, drawn from their years of experience.

When the sword swings the other way, the experience of the working design in use and as time of ownership passes, where comparisons have been undertaken and others have received demonstrations of the devices offering their assessments.

This furthering of the experiences does undoubtedly identify that something special has been done for you, and this knowledge is very satisfying, especially when some of your owned devices are being recognised as being more attractive in use than much more expensive 'off the shelf products' they have been compared against.

It is also nice to find a place of rest in the knowing the search for a particular device is definitely seen to be over.     

As all with many years of enjoying music replays on a HiFi System know, we are a 'curious old bunch' and always chasing a rainbow somewhere 😀.

@pindac Thank you for the words of encouragement from the last post. 

Well, after some back and forth, Nick Gorman has agreed to adapt the LDA to a new motor, if I can source one. @dover is there a AC motor that you could readily recommend? Or would I be looking at vintage / idler type motors to adapt to? 

Is there a webpage that I can learn more about this LDA controller?

Thanks!