2. analog
  3. 1386889530

More turntable set up problems

I have an older Teres Audio turntable, purchased in 2005. It is a basically a model 160 with some upgrades, such as a birch plywood platter, a Teres VTA adapter and a hardwood reflex clamp. The tonearm is a Moerch DP-6 Precision red dot with a 12"armtube, and the cartridge is a Zyx R100-02H. I had everything set up in 2005 and everything was still working fine when I stopped listening to it a few years ago. Just this month I decided it was time to start listening to my two channel system again - I really do regret having neglected it for so long, but you can't change the past!

The turntable is level, the VTA appears to be correct, I have aligned the cartridge with the use of a Turntable Basics protractor( the only tool I have for this) and the tracking force is set within the range suggested by Zyx. With the rather crude measuring devices I have (rulers/straight edges) the overhang seems about right - it is supposed to be 13.3 mm, but I have nothing that will measure .3 of a millimeter. Anyway, I don't know how accurate my eyes are but I think I have things set up as close to where they should be given my tool and eyesight limitations. But.....

The sound coming out of my speakers is awful.....lots and lots of distortion, sounds like a transistor radio turned all the way up, if you know what I mean (if you are old enough to have been around transistor radios, lol,) hissy and garbled, really rough.

I have tried adjusting the anti-skating on the tonearm. The Moerch DP-6 has a lever for this, not a wheel, so I can't actually dial it in, but moving the lever made no discernable difference, the system still sounded like you-know-what. I also played with the VTA, just in case, but again, this made no difference.

I am probably going to start all over again and recheck every alignment, etc., but if anyone can give me some tips as to what area I should definitely focus upon - azimuth perhaps? - given the distortion problem my system is experiencing, I would much appreciate it.

By the way, I have a DAC and CD-player in my 2-channel system as well; CD's sound wonderful, so that SHOULD eliminate the possibilities that the DAC or tube power amp are causing the problems. Of course, there is a tube phono-stage/step up in the mix as well, but I really don't think that is the source of the problem - I really think I have done something wrong with the cartridge alignment....

Holly
oakiris
swordfis
16 posts
 
Try loosening the screw on the top of the anti-skate mechanism. I have a DP8 and had a similar problem, and the problem was that the anti-skate mechanism was binding, even when I thought I had "defeated" it. Loosening the screw and re-adjusting the tension on the anti-skate did the trick for me.
dougdeacon
3,338 posts
 
Holly,

ATF fluid is fine. Chris recommended that to me also and that's what I've used. I'll dig around for the bearing assembly instructions.

Happy Holidays,
Doug
cerrot's avatar
cerrot
1,700 posts
 
any chance that the loading is set incorrectly on the phonostage?
almarg's avatar
almarg
9,670 posts
 
The sound coming out of my speakers is awful.....lots and lots of distortion, sounds like a transistor radio turned all the way up, if you know what I mean (if you are old enough to have been around transistor radios, lol,) hissy and garbled, really rough....

There is a tube phono-stage/step up in the mix as well, but I really don't think that is the source of the problem - I really think I have done something wrong with the cartridge alignment....
After reading everything that has been said (and you've been fortunate to receive inputs in this thread from a lot of very knowledgeable folks, including Mofi and his kindly offer), I definitely would not rule out the phono stage at this point. In fact, if you have confidence that the tracking force adjustment was done correctly (Doug was correct, of course, in mentioning inadequate VTF as a possibility to suspect), and if upon close inspection the orientation of the cantilever doesn't look bizarre in any way while a record is being played, a phono stage problem would be at or near the top of my list of suspects.

Hopefully you can try the other phono stage you mentioned having. If that phono stage turns out to be unsuitable, though, or if the results are inconclusive for whatever reason, one thing to try would be to simply remove and reinsert the tubes a couple of times. It's conceivable that after a number of years of non-use enough corrosion might have developed on a tube pin or socket contact to cause the problem, which would probably be scraped away by doing that.

Also, if the phono stage contains multiple tubes of the same type, try swapping their locations and seeing what happens. If the symptoms change significantly, it would cast suspicion on one of those tubes.

Finally, let us know the make and model of the phono stage, which might stimulate some further thoughts.

Regards,
-- Al
topoxforddoc's avatar
topoxforddoc
353 posts
 
Holly
The noise you describe like a transistor radio sounds like Mistracking by the cartridge.
Does this sound distorted through both channels or just one? If it is just one, (or if one is worse) then swap the tubes round in your phono stage. If it is your phono stage, the most likely thing to fail is a tube. However, most phono tubes last awful long time.
Do you have any other cartridge, which you can try? Even a cheap $30 cartridge is fine.
The most common reason for Mistracking is inadequate VTF. Did you set up the tracking force with a proper stylus pressure gauge (e.g. Shure all digital scales)? The stylus pressure force markings on tone arms can be notoriously inaccurate. If you have a problem with this, then one would normally set the tone arm to the maximum recommended tracking force 1st. If needs be, set the bias to 0 to start with; inadequate or incorrect bias rarely causes the gross distortion which you describe, unless it causes inordinate friction in horizontal plane.
Sometimes this sort of problem can be caused by dried “rubbers" in the suspension or gunge in the generator assembly. You can find it that with inadequately cleaned records or incorrectly applied stylus cleaning fluids, that dust and fluff can creep up and go up the suspension and coils.
The turntable basics protractor will not be far off In terms of geometry. Unless you are grossly out, then it is unlikely that this would be the cause of your problems.
Good luck and Happy Christmas!

Charlie
More to discover