Numark TTUSB tonearm adjustment Options

[rocket_pc]

I have first browsed the wiki for this, though only a few minutes. My question is about adjusting the tone arm on the Numark TTUSB. Can anybody tell me where there are instructions on adjusting the counterweight on the tone arm of the Numark TTUSB and adjusting the anti-skate mechanism?

I got the turntable yesterday. The instructions in the operator's manual is insufficient, with only a few sentences on the subject that seem very ambiguous to me.

The manual says,

...there should be a feeling of weight and resistance when the head shell is raised and lowered. Begin rotating the counterweight clockwise (away from the pivot point) until the weight and resistance feeling is gone. If done properly, the tone arm will pivot with very little resistance back and forth indicating that there is exactly 0 grams of stylus pressure. With the counterweight in its new position further away from tone arm pivot point, grasp the scale ring of the counter weight and rotate it until "0" is in the vertical position. Finally, rotate the counterweight (and scale ring) counter-clockwise (towards the pivot point) until the desired amount of weight is reached. If the scale rotates 360 degrees beyond the zero point, the new scale ring reading should be added to 3.5.

I don't understand these instructions at all. I remember seeing somewhere last month, when shopping for this, mention of some website or other with instructions on adjusting the tonearm and antiskate functions.

Thank you, in advance, for your attention on this subject.

Don

This post has been edited by greynol: Dec 11 2009, 22:04

Reason for edit: Please use the default font. Placed quote in the proper container.

[rocket_pc]

Thank you for your reply, cliveb. I hope you understand my absence - Christmas holidays... Didn't get the xmas LPs converted to digital, either. Was out of time, last week before Christmas, to get the recording system in order.

Anyway, I would like to ask about the "blank record" that was mentioned here, before this thread expires. Is there a place that I can purchase a blank record like this, and stylus/anti-skate instructions?

Thank you for your help on this subject.


Don

[cliveb]

Anyway, I would like to ask about the "blank record" that was mentioned here, before this thread expires. Is there a place that I can purchase a blank record like this, and stylus/anti-skate instructions?

The force that draws the stylus towards the centre of the record is due to the pressure exerted by the groove sidewall. So a record with no grooves doesn't help. If you're serious about setting antiskate correctly, you need to get a test record with high level tones cut at the outer, centre and inner parts.

[rocket_pc]

The force that draws the stylus towards the centre of the record is due to the pressure exerted by the groove sidewall.

cliveb, You said that "The force that draws the stylus towards the centre of the record is due to the pressure exerted by the groove sidewall." Yes, but the turntable has an antiskate function that keeps this from occurring. Could you tell me where I can find the blank record or special record, that you mention, for conducting this test, and a reference for carrying out this test?

Thanks.

Don

This post has been edited by JensRex: Jan 31 2010, 13:36

[cliveb]

cliveb, You said that "The force that draws the stylus towards the centre of the record is due to the pressure exerted by the groove sidewall." Yes, but the turntable has an antiskate function that keeps this from occuring. Could you tell me where I can find the blank record or special record, that you mention, for conducting this test, and a reference for carrrying out this test?

Perhaps I didn't explain things clearly enough. By "blank record" I took you to mean one without any grooves cut in it. This won't work. You need to get a test record with a signal cut into the grooves designed for this purpose. I personally use a test record called "HiFi Sound HFS75". One nice feature of HFS75 is that it has antiskating cuts at the outer, centre and inner portions of the record, allowing you to find the best compromise. (The ideal amount of anti-skating varies across the record). However, I don't believe HFS75 is available any more. HiFi News do a test record, but I'm not sure exactly what cuts it has. http://www.needledoctor.com/Brand-Stores/LP-Test-Records has a few test records listed. One of them, "Ultimate Analogue Test LP" looks to have some useful stuff on it (but only one antiskating test cut, at the outer edge of the LP).