Vintage DD turntables. Are we living dangerously?

pbnaudio,

Sorry for the delay in responding - I check this thread less often than I used to.  Yes, adjusting the bearing cap does change the height and your instructions are probably right.  I diddled with that for quite a while but then I changed the washers that the motor unit is mounted to the frame through. Here is a response I posted on the the nude turntable thread three years or so ago where I discuss that change.  It made adjusting the motor height much easier if nothing else.

https://forum.audiogon.com/discussions/nude-turntable-project/post?postid=388553#388553

pbnaudio,

As you are working on setting up a TT-101 I have a question:  can you consider what it would require to pull the power board and transformer out of the tin can and mount them in a separate box?  I would love to do this as it is a source of both vibrations and rf emissions.

Thanks.

While I am posting to this thread I wonder if others in our situation are keeping an eye on the latest Technics coreless dd turntable.  I hate that they chose the SL1200 model to follow and hope that they will consider the SP10 model for a new even higher end offering.  I see this tt as a suitable replacement if my TT-101 pulls the plug.

Aigenga, Vibrations and EMI can come from the power transformer more than anything else.  It would not be much of a trick to re-mount it outside the chassis on a separate base.  And you might be able to do it with the rectifiers and filter capacitors that together with the transformer constitute the power supply. However, I would be very leery of moving those servo and motor control circuit boards off-chassis.  Peter already told me privately that he sees this as a bit of a problem with the TT101, whereas you may know that he did do it successfully for the DP80 in the context of his aftermarket plinth.  I too will be interested in his take on moving the circuitry off-chassis, once he solves the problems with his unit.

Aigenga and Lewm

Moving the power supply out of the TT101 should be fairly easy as its treated as a separate entity inside the TT101, the transformer and the +5VDC and the +/-12VDC regulators are on a separate board which supplies the Motor control board via a 5 wire harness (J6).  All this could be made into a separate external high quality power supply.   If theres an interest in this I could possibly design and make one, just like I did for the SP10MK2. http://www.usaudiomart.com/details/649235872-technics-sp10mk2-upgraded-power-supply-by-pbn-audio/

That being said the transformer in the TT101 is a torrid it is potted and mounted in a steel can so JVC took great care isolating it, if its worth the extra trouble i don't know.  I don't think it would be a good idea moving the entire circuitry of the plinth, there's a lot to consider, the interface for an example (pushbuttons / LED / readout). This took quite some time to do on the Denon's that we offer as a product http://pbnaudio.com/audio-components/audio-turntables/groovemaster/groovemaster-vintage-direct

Im still working on repairing the TT-101 i bought, someone earlier had done a terrible job "re capping / repairing" it so theres some work to do.
Ill keep everyone posted as to its outcome. I will make a nice looking plinth for the TT-101 once I get it functional. 

Tomorrow Ill finish up my SP10MK3 - looking greatly forward to that one.

Good Listening

Peter