Vintage DD turntables. Are we living dangerously?

Gary, I found on that thread or another DD-related thread that I first wrote about shielding the motor in my L07D, and you asked ME questions at that time. So I assume you proceeded from there, but to find out what exactly I am looking at in your photos, I will seek out the posts you cite. Sadly, the product "TI Shield" seems no longer to be available. One might use mu metal or ERS cloth or just a sheet of copper or stainless or etc. Each has slightly different properties as a shield.

... Always happy to learn and share.

Hi Gary,
I found your post of 9/16/13. I now know (once again) that your shield is made of mu metal and that the black stuff is auto interior material (which is exactly what it looks like). I probably also knew this 7 months ago, when you posted the info and photos originally, but the memory is fleeting. I found that same stuff on eBay that you have used. I Googled the eBay product, and there was some discussion that it is not as "good" as mu metal (it's a lot cheaper), but most conceded that it does work as a shield. I like your metaphor about squeezing a balloon, where you are describing what happens to the EMI when you installed the shield; the energy shows up elsewhere but not where you don't want it. Possibly, if you can ground the shield to the turntable, you would actually drain the energy to ground. But that may be tough to do.

I am going to get used to the sound of the TT101 with no shield, then install a shield, perhaps using the very same material you used, and see if I can hear a difference. I wonder whether some of the perceived benefits of those heavy copper platter mats are actually due to the shielding effect such mats have. If you read the verbal descriptions of the improvements in sonics, it certainly is consistent with the shielding effect.

Lew, I suggest that if you have or have access to an iPhone that you check out the Tesla app to see where the EMI is. You might not have a problem.
Gary

My intermittent speed problems on my Pioneer Exclusive P10 - racing up and down and failing finally became permanent.

Took the table into the tech and he said most probably changing all the caps would fix the issue. yesterday I got a call that the table was ready.

When picking up he said that replacing all the caps did not fix the problem. he searched the entire web and no schematics on the table. He eventually found it was a faulty IC from the 45rpm control that did not switch off and would distribute noise/interference to the 33 IC control.
these specific IC's had been long discontinued. So he studied a bit more and made his own! problem fixed.

the interesting this was that the tech had previously worked on Denon and Halcro's JVC DD's. Even thou they look similar from the outside, the internals and design's of all 3 were very different as was the number of parts, complexity etc etc.

I played it at home all last night and the speed sync's straight away and is playing beautiful music - fingers crossed it stays that was, but with the caps all changed on my 35 year old DD I have a fighting chance :-)

cheers