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Numark TTUSB tonearm adjustment
rocket_pc
post Dec 11 2009, 22:03
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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,
QUOTE
...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.
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rocket_pc
post Jan 21 2010, 06:39
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Group: Members
Posts: 28
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Member No.: 75846



Hi audiophiles, Thank you for your replies, Cliveb, Axon, and Krueger. To start off the year, I have been involved with several technical support issues of electronics things that I have. On the subject of the lp turntable testing disks, you have convinced me that the "Ultimate Analogue Test LP" would be a good investiment. The problem now isn't the cost of a test record, but the several testing instruments that may be required to conduct the tests offered by the tracks on this test LP.

For example, browsing through a list I found of tracks of this test LP, some of the test instruments that I had seen mentioned were: an oscilloscope, preamp adjustment (which is part of the usb turntable), AC millivolt meter, cartridge (part of the turntable, the tonearm), IMD tester, a Wow & Flutter meter, a stethoscope on the plinth (I've got a stethoscope) And I have seen mentioned someplace else, that a strobe light can be used for testing the turntable.

If all of the tracks of this LP require expensive instruments, then there would be no purpose in getting this test LP. Remember that my turntable is a Numark TTUSB, with limited, imprecise adjustments. (The tonearm weight is simply pushed back and forth. And the anti-skate dial appears to be a cheap recast of another dial.)

All I had planned for this turntable was to convert half a dozen Christmas records to digital (now for next year) and convert about a dozen other LPs to digital. I do have maybe a few hundred LPs, though I have little interest in most of the lot.

About reading on how to conduct these tests, Hydrogenaudio may be having some technical problem with their website, as some of the links on the knowledgebase are blank. I did find a site describing testing instruments: <http://collectingvinylrecords.blogspot.com/2009_04_05_archive.html>

So, are special instruments required? I would spend ten or fifteen dollars on a few instruments, but not the hundreds of dollars.


Below is a list of the tracks of the test LP, "Analogue Productions - The Ultimate Analogue Test LP". I removed all of the comments to save space here, and to avoid copyright infringement. The article in detail is at: <http://store.acousticsounds.com/index.cfm?get=detail&title_id=35532>


Side 1

Track 1 1Khz reference tone 7cm/s Mono, in phase (Lateral)

Track 2 1kHz reference level Left channel only

Track 3 1kHz reference level Right channel only

Track 4 1 kHz tone at -20 below reference level, Lateral

Track 5 10 kHz reference tone at -20dbu, Lateral

Track 6 1 kHz to 20 kHz sweep at -20dbu, Mono (Lateral)

Track 7 1 kHz to 20 Hz sweep at 0 VU (Lateral)

Track 8 100 Hz reference tone at 0 vu (Lateral)

Track 9 VTA adjust

Track 10 Standard Wow & Flutter test signal; 3150Hz

Side 2

Track 1 Anti-skating test; 315Hz amplitude sweep to +12dbu (Lateral)

Track 2 Pink noise lateral

Track 3 Pink noise vertical

Track 4 1kHz @ reference level, vertical

Track 5 1kHz to 10Hz sweep @ -20 below

Track 6 Silent groove for bearing rumble and table isolation



The above "The Ultimate Analogue Test LP" you mentioned is highly rated. What about this test LP, "Realistic Stereo Test Record Home & Lab Audiophile LP"? Are these tracks valuable and without requiring alot of testing instruments?

1. Speaker Phasing and Channel Identification, 2. Channel Balance, 3. Frequency Response, 4. Cartridge Evaluation, 5. Stereo Separation, 6. Stereo Spread, 7. Effective Hum, 8. Rumble, 9. Flutter.

Thank you for your time, helping with this.

Don





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Posts in this topic
- rocket_pc   Numark TTUSB tonearm adjustment   Dec 11 2009, 22:03
- - DVDdoug   I don't have that turntable, but the instructi...   Dec 11 2009, 22:47
- - rocket_pc   Thank you for the reply, DVDdoug. I didn't se...   Dec 12 2009, 23:12
- - rocket_pc   Thinking about this, once again, adjusting the ton...   Dec 13 2009, 05:30
|- - MichaelW   QUOTE (rocket_pc @ Dec 13 2009, 16:30) Th...   Dec 13 2009, 06:47
- - rocket_pc   Thanks for the reply, Michael. Okay, now I unders...   Dec 13 2009, 21:24
- - MichaelW   I can't give a reasonable explanation of anti-...   Dec 13 2009, 21:28
- - pdq   As the record turns, the needle dragging in the gr...   Dec 14 2009, 00:11
|- - cliveb   QUOTE (pdq @ Dec 13 2009, 23:11) As the r...   Dec 14 2009, 09:49
- - rocket_pc   Thank you for your replies. Michael, the google s...   Dec 14 2009, 01:47
- - Axon   Antiskate is complicated, and different instructio...   Dec 14 2009, 04:19
- - Axon   Adjusting by ear means adjusting both the tracking...   Dec 14 2009, 11:40
- - rocket_pc   I could just "adjust by ear" - listen to...   Dec 14 2009, 19:47
|- - cliveb   QUOTE (rocket_pc @ Dec 14 2009, 18:47) I ...   Dec 15 2009, 09:43
- - rocket_pc   Thank you for your reply, cliveb. I hope you unde...   Jan 10 2010, 08:59
|- - cliveb   QUOTE (rocket_pc @ Jan 10 2010, 07:59) An...   Jan 10 2010, 10:52
|- - rocket_pc   QUOTE The force that draws the stylus towards the ...   Jan 10 2010, 12:26
|- - cliveb   QUOTE (rocket_pc @ Jan 10 2010, 11:26) cl...   Jan 10 2010, 15:08
|- - rocket_pc   QUOTE However, I don't believe HFS75 is availa...   Jan 10 2010, 16:41
- - rocket_pc   Hi cliveb, Thank you for your reply. I've go...   Jan 12 2010, 06:18
|- - cliveb   QUOTE (rocket_pc @ Jan 12 2010, 05:18) I ...   Jan 12 2010, 09:34
|- - Arnold B. Krueger   QUOTE (rocket_pc @ Jan 12 2010, 00:18) I ...   Jan 12 2010, 14:09
- - rocket_pc   There shouldn't be too much wear from testing,...   Jan 13 2010, 00:30
|- - cliveb   QUOTE (rocket_pc @ Jan 12 2010, 23:30) Th...   Jan 13 2010, 10:49
- - Axon   The Ultimate Test LP is also worth looking at, and...   Jan 13 2010, 00:31
- - rocket_pc   Hi audiophiles, Thank you for your replies, Clive...   Jan 21 2010, 06:39
- - Knowzy   QUOTE (cliveb @ Jan 12 2010, 01:34) You...   Jan 21 2010, 21:19
|- - cliveb   QUOTE (Knowzy @ Jan 21 2010, 20:19) A bet...   Jan 22 2010, 13:27
|- - paulhyland   QUOTE (cliveb @ Jan 22 2010, 07:27) QUOTE...   Feb 14 2012, 20:30
|- - Arnold B. Krueger   QUOTE (paulhyland @ Feb 14 2012, 14:30) Q...   Feb 15 2012, 14:41
- - rocket_pc   Hi Knowsy, I believe that you're the guy whom...   Jan 22 2010, 02:16
- - Knowzy   QUOTE (rocket_pc @ Jan 21 2010, 18:16) Hi...   Jan 22 2010, 06:27
- - Knowzy   QUOTE (cliveb @ Jan 22 2010, 05:27) I res...   Jan 22 2010, 19:06
- - rocket_pc   Thank you very much for your replies. What I thin...   Jan 23 2010, 05:23
- - Knowzy   QUOTE (rocket_pc @ Jan 22 2010, 20:23) Wh...   Jan 23 2010, 22:09
- - rocket_pc   Okay, I won't get that. How can they they eve...   Jan 23 2010, 23:14
- - Knowzy   QUOTE (rocket_pc @ Jan 23 2010, 14:14) Ho...   Jan 23 2010, 23:28
|- - arranzio   Hi Rocket I just arrived here googleing, looking ...   Jan 29 2010, 12:59
- - Knowzy   Hi Albert, Welcome to HA. That is a lot to diges...   Jan 30 2010, 02:05
|- - arranzio   Thanks for your comments, Jeff. Yes pretty long, ...   Jan 30 2010, 02:34
- - rocket_pc   Hi all, I aggree that this Numark is a lousy turn...   Jan 30 2010, 18:15
|- - cliveb   QUOTE (rocket_pc @ Jan 30 2010, 17:15) Th...   Jan 31 2010, 10:54
- - rocket_pc   Hi cliveb, I wouldn't conclude that this Num...   Jan 31 2010, 12:05
|- - cliveb   QUOTE (rocket_pc @ Jan 31 2010, 11:05) I ...   Feb 1 2010, 10:39
- - Knowzy   QUOTE (rocket_pc @ Jan 30 2010, 09:15) Th...   Feb 1 2010, 20:40
- - rocket_pc   Thank you for your replies. I've got a couple...   Feb 2 2010, 06:23
- - rocket_pc   My digital camera is malfunctioning. Reading from...   Feb 3 2010, 01:34
- - Knowzy   QUOTE (rocket_pc @ Feb 2 2010, 16:34) Rea...   Feb 3 2010, 06:37
|- - cliveb   QUOTE (Knowzy @ Feb 3 2010, 05:37) I...   Feb 3 2010, 10:01
- - rocket_pc   Thank you for your replies. Jotted down the info ...   Feb 3 2010, 17:29
- - Knowzy   QUOTE (rocket_pc @ Feb 3 2010, 08:29) Hav...   Feb 3 2010, 23:08
- - rocket_pc   Hi all, I'm back, for a moment. Up front, t...   Feb 10 2010, 10:48
|- - rocket_pc   PS: The Shure cartridge that you mentioned in thi...   Feb 10 2010, 10:56
|- - cliveb   QUOTE (rocket_pc @ Feb 10 2010, 09:48) Ca...   Feb 11 2010, 19:21
- - Knowzy   QUOTE (rocket_pc @ Feb 10 2010, 01:48) Th...   Feb 11 2010, 07:50
- - rocket_pc   Thank you for your reply, cliveb and knowsy, It w...   Feb 11 2010, 23:09


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