Using piece of wood for a spacer AT LP120?

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Canadianguy51
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Using piece of wood for a spacer AT LP120?

Post by Canadianguy51 » 18 Sep 2019 15:29

HI....I have this AT LP 120 and I added a piece of wood for a spacer between cartridge and shell. Weighs about 1.8g. Do I have to add more weight to the tone arm since there is now a wood spacer?

Thanks

Copperhead
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Re: Using piece of wood for a spacer AT LP120?

Post by Copperhead » 18 Sep 2019 16:11

Canadianguy51 wrote:
18 Sep 2019 15:29
HI....I have this AT LP 120 and I added a piece of wood for a spacer between cartridge and shell. Weighs about 1.8g. Do I have to add more weight to the tone arm since there is now a wood spacer?

Thanks
If you mean re-balancing the tonearm after fitting the spacer, then yes. Just go through the usual balancing procedure. You only have to worry if the counterweight is not heavy enough to counteract the headshell's weight. But the 1.8grams you added are not going to cause that to happen.

lenjack
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Re: Using piece of wood for a spacer AT LP120?

Post by lenjack » 18 Sep 2019 16:15

Just balance as the instructions tell you too.

JoeE SP9
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Re: Using piece of wood for a spacer AT LP120?

Post by JoeE SP9 » 18 Sep 2019 17:12

Why add the spacer?

Canadianguy51
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Re: Using piece of wood for a spacer AT LP120?

Post by Canadianguy51 » 18 Sep 2019 18:24

Because the tone arm won't go any lower to level out the tone arm. I have a felt mat and a rubber mat on the platter now, but didn't raise it quite enough.

Canadianguy51
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Re: Using piece of wood for a spacer AT LP120?

Post by Canadianguy51 » 22 Sep 2019 21:10

The tonearm looks straight now on the record,the front of the cartridge is ligned up with letter c on the protractor. It sounds great, but the cartridge looks real close to the record?
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Looking again, i think there is to much weight. Since this AT-VM95E is set at 2g and that piece of wood under shell is 1.89, I thought the tracking would be at somewhere between 3.89?


I set it back to 2 and seems back to where originally it was, looks good,sounds the same...
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plyscds
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Re: Using piece of wood for a spacer AT LP120?

Post by plyscds » 23 Sep 2019 16:43

Audio-Technica has a heavier tonearm counterweight that fits the AT- PL/LP tonearms -- the AT-CW1. It is supposed to be the same counterweight used on AT's newer turntables. If you want to deal with LP Gear/Tunes, they list it at $29.98. I have one, and I know it can help with cartridge configurations heavier than what came in the box with "PL" and "LP" 120 turntables. It moves the mass of the counterweight closer to the tonearm's pivot points and lets the tonearm react better to whatever movements are necessary to track a record. Hypothetically this means less wear to the groove walls.

Achieving an optimum tracking angle with A-T's "PL" and "LP" 120s is a "raise the bridge" or "lower the river" issue. However the issue is successfully and correctly resolved, you end up with much better sounding playback.
\:D/

Canadianguy51
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Re: Using piece of wood for a spacer AT LP120?

Post by Canadianguy51 » 23 Sep 2019 16:49

plyscds wrote:
23 Sep 2019 16:43
Achieving an optimum tracking angle with A-T's "PL" and "LP" 120s is a "raise the bridge" or "lower the river" issue. However the issue is successfully and correctly resolved, you end up with much better sounding playback.
\:D/
Raising bridge or lowering river? I'll check into that counter weight...

lenjack
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Re: Using piece of wood for a spacer AT LP120?

Post by lenjack » 23 Sep 2019 16:54

I don't think you need it. If you're tracking fine at 2 grams, and the arm is at the right height, why make any further changes?

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Re: Using piece of wood for a spacer AT LP120?

Post by Copperhead » 23 Sep 2019 17:26

Canadianguy51 wrote:
23 Sep 2019 16:49

Raising bridge or lowering river?
You might need a pump for that.

Regardless of the weight of the headshell, or the spacer you added, VTF should always be set according to the cartridge's playing weight. So if the specs state 2 grams (for example) that is what you need to dial in. Forget about the extra 1.8 grams, if you add that as well your stylus will bottom out and won't cope, especially as soon as it encounters a warp in the record. That and the possibility of ruining records.

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Re: Using piece of wood for a spacer AT LP120?

Post by chgc » 23 Sep 2019 18:39

That’s a pretty big spacer. I can’t help thinking that the tonearm height adjustment is out of whack, or something.

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Re: Using piece of wood for a spacer AT LP120?

Post by noisefreq » 23 Sep 2019 19:07

Here's a perfect opportunity to play with VTA.

Looks to me like the cart is too low in back.
Remove a mat or find a thinner spacer.

I use balsa or even a paint stir stick cut to size.
Make the spacer as small as what looks appropriate.
Less weight is good.

Make note of how it sounds with each change.

Buy a cheap digital scale to keep track of where you're at.

You can make it work with what you have on hand in the pictures.

Above all, trust your ears.

Canadianguy51
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Re: Using piece of wood for a spacer AT LP120?

Post by Canadianguy51 » 23 Sep 2019 19:19

This cart is hard to tell because the bottom of it is slightly curved, I like it the way it is...for now. These turntables are know for the tone arm adjustment to be out of wack. With that .25" piece of wood the tone are measurement is at 1 before that I had it cranked down as far as it would go and it was reading past zero and the tone arm was still on angle?? Not sure what they were thinking when they made this TT??


I didn't realize till now that there is a sub forum for the make of this turntable, they can move this post if they want.

I took the bottom felt mat off, this looks much better.

Thanks
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chgc
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Re: Using piece of wood for a spacer AT LP120?

Post by chgc » 23 Sep 2019 23:31

Cosmetically, the LP120 is a copy of the Technics SL-1200. If the tonearm height adjuster works the same way, I’d guess it was out of calibration.

https://www.youtube.com/watch?v=rgjQsZsCGtA

lenjack
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Re: Using piece of wood for a spacer AT LP120?

Post by lenjack » 23 Sep 2019 23:35

Yes. There should be no need to use a thick wooden shim like this, unless there was something wrong with the turntable.

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