Turntable issue with cartridge force - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 9 Old 09-18-2019, 06:47 AM - Thread Starter
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Turntable issue with cartridge force

So I just got an Audio Technica AT-LPW40WN. It has an VM95E Cart on it. And the weight is suppose to be set at 2. So I go ahead balance the tonearm then dial in 2g. Put on a record and within a couple seconds I hear a loud bass hum that continues throughout every song. I and I was at a loss for what was causing it. Then I realized that it was actually the stylus slightly vibrating causing it. I change the tracking force to 2.5g and the problem disappears and it works fine. Why would this be happening? I know it is suppose to be set to 2g and I did level the table as well. I just can't figure out why I am getting that vibration at the correct tracking force.
Yes I set anti-skate as well.
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post #2 of 9 Old 09-18-2019, 07:07 AM
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Dust cover open or closed when playing? Perhaps static electricity?

Just a SWAG.



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post #3 of 9 Old 09-18-2019, 08:16 AM - Thread Starter
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Originally Posted by Ratman View Post
Dust cover open or closed when playing? Perhaps static electricity?

Just a SWAG.
I tried it with the lid on and off and not attached at all.
Would changing the tracking force be enough to ignore static electricity?
I have one of the dust brushes which I was under the impression helped clear static electricity. As well as my humidity being pretty decent.
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post #4 of 9 Old 09-18-2019, 08:32 AM
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Brushes attached to the cartridge require additional tracking force.


"tried it with the lid on and off and not attached at all."
So you can probably scratch static off your list of concerns.



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post #5 of 9 Old 09-18-2019, 08:46 AM
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I’d recommend you get yourself an external stylus force gauge. May have NO bearing on your situation, but it’s something ALL turntable owners should have.
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post #6 of 9 Old 09-18-2019, 09:54 AM
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Quote:
Originally Posted by shortyg83 View Post
...
I have one of the dust brushes which I was under the impression helped clear static electricity. As well as my humidity being pretty decent.
Explain the BRUSH? Is this one attached to the Cartridge or Tonearm, or is it just a hand held brush for cleaning the records before you play them?

I have a Stanton that as a brush attached, and it does require extra weight to offset the upward force of the brush.



I think it requires an extra 1 gram of tracking force. So if I functionally want 2g, then I have to set it for 3g.

Perhaps this not what you meant, but it wasn't clear.

What you are likely experiencing is Rumble, which is a type of low frequency feedback. The needle vibrates the speakers, the speakers in turn vibrate the needle causing a feedback loop.

Consider where the Turntable is in relation to the speakers, sometime all it take is a small repositioning of the speakers or turntable to stop the feedback.

That's why people asked about whether the cover was up or down. If the cover is down it could help block the sound from the speakers, though it could also set up a resonant cavity, so it is not sure thing.

I suspect, moving the speaker forward would make the most difference. Try moving the speakers forward by about a Meter or a Yard, and see if you still have the feedback. This may not be practical in your room, but it serves as a test to verify the problem.

Also, putting the speakers literally back against the wall or in the corners is not a good thing. True it boost the bass, but it does so at the sacrifice of Mid/High clarity. While the bass is boosted, what you hear is the Mid/High becoming more recessed and muddy.

In my case, I have my turntable next to a pretty big speaker, but I am able to offset any feedback problems by careful placement of the speakers.

Shear Volume can also be a problem. If you are playing excessively loud, that could explain the feedback.

Again, if this is a placement issue of the Turntable relative to the Speakers, I can think of several potential solutions, but I don't really have enough of a sense of the system or the room to make those suggestions. A photo would be helpful.

Again, a list of the equipment you have and a photo would be very helpful to solving the problem.

Keep in mind, there is a (Square) factor, as in , which is why small changes in the position can make a big difference in the feedback problem.

Steve/bluewizard
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Last edited by bluewizard; 09-18-2019 at 09:58 AM.
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post #7 of 9 Old 09-18-2019, 09:56 AM - Thread Starter
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Sorry for the confusion. I mean a hand held brush that I was led to believe could help clear dust and static. Not the cartridge mounted brush.
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post #8 of 9 Old 09-18-2019, 10:01 AM - Thread Starter
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Quote:
Originally Posted by bluewizard View Post
Explain the BRUSH? Is this one attached to the Cartridge or Tonearm, or is it just a hand held brush for cleaning the records before you play them?

I have a Stanton that as a brush attached, and it does require extra weight to offset the upward force of the brush.



I think it requires an extra 1 gram of tracking force. So if I functionally want 2g, then I have to set it for 3g.

Perhaps this not what you meant, but it wasn't clear.

What you are likely experiencing is Rumble, which is a type of low frequency feedback. The needle vibrates the speakers, the speakers in turn vibrate the needle causing a feedback loop.

Consider where the Turntable is in relation to the speakers, sometime all it take is a small repositioning of the speakers or turntable to stop the feedback.

That's why people asked about whether the cover was up or down. If the cover is down it could help block the sound from the speakers, though it could also set up a resonant cavity, so it is not sure thing.

I suspect, moving the speaker forward would make the most difference. Try moving the speakers forward by about a Meter or a Yard, and see if you still have the feedback. This may not be practical in your room, but it serves as a test to verify the problem.

Also, putting the speakers literally back against the wall or in the corners is not a good thing. True it boost the bass, but it does so at the sacrifice of Mid/High clarity. While the bass is boosted, what you hear is the Mid/High becoming more recessed and muddy.

In my case, I have my turntable next to a pretty big speaker, but I am able to offset any feedback problems by careful placement of the speakers.

Shear Volume can also be a problem. If you are playing excessively loud, that could explain the feedback.

Again, if this is a placement issue of the Turntable relative to the Speakers, I can think of several potential solutions, but I don't really have enough of a sense of the system or the room to make those suggestions. A photo would be helpful.

Again, a list of the equipment you have and a photo would be very helpful to solving the problem.

Keep in mind, there is a (Square) factor, as in , which is why small changes in the position can make a big difference in the feedback problem.

Steve/bluewizard
I will try moving stuff around tonight. Do you think using the 2.5g over 2g would be detrimental in anyway? I think the cartridge is rate up to 2.2 and I could probably go a little lower than 2.5.
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post #9 of 9 Old 09-18-2019, 01:32 PM
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The VTF range for the VM95E is 1.8g to 2.2g, so you're just a little over the high end at 2.5. I don't trust the accuracy of the markings on the tonearm counterweight. You might not really be at 2.5. Or you might be way over. I second the suggestion to get a stylus force gauge. Something like this from Amazon works nicely: https://www.amazon.com/Neoteck-Digit.../dp/B01HRJ9NAY

When you say the stylus is vibrating, I assume you mean the cantilever. Is it vibrating side to side or up and down? If side to side, it could possibly be that your anti-skate setting is set too high.

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