How to identify grove distortion ?

[Tanoj]

Hi Friends

i am keen to know how do we need to identify if there is inner/outer grove distortion happening ?

How will it sound like ? , i can easily identify surface noise cos of the pop's and click's sounds , but never got to know how the grove distortion sounds like

As far as i know if there is grove distortion happening it can be rectified by adjusting the Anti-skate , or is there any other solution too ?

Regards

Tanoj

 

[omishra]

If record and cart is good but misaligned then it would sound like weak FM station playing music. I mean lot of hiss (surface noise), all vocals and music notes, mostly in high pitches would be cracking.

 

[anilva]

Hi Friends

i am keen to know how do we need to identify if there is inner/outer grove distortion happening ?

How will it sound like ? , i can easily identify surface noise cos of the pop's and click's sounds , but never got to know how the grove distortion sounds like

As far as i know if there is grove distortion happening it can be rectified by adjusting the Anti-skate , or is there any other solution too ?

Regards

Tanoj

Mis-aligned geometry will cause groove distortion. Cannot be corrected by antiskate.

Groove distortion sounds like "distortion", like Om mentioned - lot of cracking up of sound.

 

[jls001]

First, how to avoid inner groove distortion? By aligning the cartridge to the outer and inner null points (you can use the Stupid Protractor for this), and also set correct overhang (distance from center of spindle to the tip of the stylus). In fact one should set overhang first and then go about setting null points alignment.

Overhang varies from tonearm to tonearm. Check what is the recommended value for your arm. I had recently posted a protractor I designed for adjusting overhang. You can tailor it to your arm if you know the pivot to spindle distance and the overhang.


Bad alignment will result in distortion in the midrange. Human voices, violin solos, massed strings, sax solos, electric guitar solos, etc, will sound distorted and gritty, especially if they are in the inner tracks.


Antiskate: will not cure groove distortion. When a record rotates and the stylus is dropped on it, the arm will have a force that is drawing it towards the spindle. Left to itself, the arm will "skate" towards the spindle. This is obviously undesirable. So a small force that will counter the force that is pulling the arm towards the spindle has to be applied for the arm to track steadily. This is the "antiskate" force. One can use a small weight or a calibrated spring to produce this "anti" force.

 

[Tanoj]

aligning the cartridge to the outer and inner null points (you can use the Stupid Protractor for this)

Thank you very much for the information

i think i missed doing this part, iam using sony sl 12 TT, its got s tonearm

could you please let me know which protractor suits and also provide me steps to check the null pints and adjust

regards

Tanoj

 

[jls001]

Thank you very much for the information

i think i missed doing this part, iam using sony sl 12 TT, its got s tonearm

could you please let me know which protractor suits and also provide me steps to check the null pints and adjust

regards

Tanoj

Use Baerwald.

I can't find details about your TT in vinylengine.com. If you have the manual, check out what is the recommended overhang. Assuming you know the overhang, adjust the overhang first.

Hope you have downloaded the Stupid Protractor, printed it to scale, and punched the hole for the spindle. I have made a rough guide on how to use the Stupid Protractor. Please PM me your email ID. I will mail it to you, as it loses clarity when posted as a picture here.