• The move to the new server is done. There are some software and database maintenance updates in process. This has us passing the hat around to help out. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html

Thorens TD 160- Sansui SR-525

edwinh

Active Member
Hello all,

About 15 years ago, I bought the TD 160 for $80. It worked but it was rough, so I've invested a bit into it, it was maintained about 10 years ago, bearing lubricated, etc. But the suspension has never been right. I bought new springs from Vinyl Nirvana and tried to get everything adjusted, but never got that Thorens bounce to work. A couple of years ago, I gave it to a local tech who was supposedly "the guy" for turntable work, along with a setup, he also replaced the wires going to the preamp. However, he seemed unable to get the suspension right and he used generic cables, which I suspect are just cheap interconnects with the RCAs on one end cut off, so the capacitance is likely pretty high. I have had Grado cartridges on it, which sound great, but suffer from the dreaded hum. I've been messing with this thing for years and never felt that it was quite right.

On a whim, I bought a Sansui SR-525 from Craigslist. It works fine and I transferred the Grado (Gold 3) to it and it sounds really nice. Speed is right on and the arm works well (it needed the weight, but that was easily found). At some point, I'll recap it, but so far, no issues. It's also nice to have a TT immune to footfalls. It seems to be highly regarded and from the specs, is actually a bit quieter than the TD 160.

So, I'm wondering what to do in the long run. Strip the Thorens down and completely rebuild it? Sell it and just live with the SR-525? I can't really afford to send it to VN for an overhaul. It seems like it should work better than it does, although, aside from the hum, it sounded fine.

What would you do?
 
Register to hide this ad
first put a cartridge on the Thorens that isn't listed on the Grado Turntable Hum list.
 
first put a cartridge on the Thorens that isn't listed on the Grado Turntable Hum list.
I've already done that with an AT-VM95ML. Frankly, the issue for the Thorens wasn't really the hum because I know that was fixable with a new cartridge and wasn't terrible. It's the inability for me to get the suspension properly calibrated.
 
Suspension tuning is a pain. I had ehoove do my TD-160 Super years ago before he started into his tt upgrade phase. Did a nice job. Said the screws were about to fall out of mine.

The 125 isn't as bad I don't think.

You have read about doing this on theanalogdept, haven't you?
 
Suspension tuning is a pain. I had ehoove do my TD-160 Super years ago before he started into his tt upgrade phase. Did a nice job. Said the screws were about to fall out of mine.

The 125 isn't as bad I don't think.

You have read about doing this on theanalogdept, haven't you?
Yes. I also have the videos from Vinyl Nirvana after buying the replacement springs from him.
 
There is a lot written about how to tune them and it all seems to translate into a bunch of faffing about looking for some magical but subjective "good bounce". Its nonsense. This is how Thorens tells you to set the suspension after doing the Super conversion, which is basically just some damping material on the sub-chassis and a different hunk of wood for the arm mount. It works on a non-super too though.

FWIW, I'd put the stock springs back in unless the replacements are the same spring rate as the originals. Its a spring rate and mass equation to tune the resonance to whatever it ought to be. Change one without changing the other and it all goes out the window.


1710640369931.png


if you have hum problems, make sure the wiring is actually correct. Stock, they do not use a ground wire. There is a way to add one, but it has to be done correctly or its basically guaranteed to make it hum. Confirm its set up either like it was from the factory, or using the instructions below. If one of the origjnal grounds from the tonearm or from fixed chassis to sub-chassis is missing it won't behave itself. Cartridges with metal mounting ears and a ground strap can also do dumb things, but its easily fixed with plastic insulating washers.

Page05 copy.gif

Page06 copy.gif
 
Back
Top Bottom