Help with some weird distortion - diyAudio
Go Back   Home > Forums > Source & Line > Analogue Source

Analogue Source Turntables, Tonearms, Cartridges, Phono Stages, Tuners, Tape Recorders, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 12th June 2009, 05:46 AM   #1
diyAudio Member
 
Join Date: Oct 2005
Location: Monroe, NC (SE of Charlotte)
Send a message via AIM to Binaural
Default Help with some weird distortion

Well, I've come a long way on my vinyl playback setup. I built a Ladegaard air bearing tonearm and have it successfully working. I upgraded to a Denon DL-103 cartridge with Lundahl MC step up transformers. I feel I have everything set up properly, VTA, VTF, azimuth, the whole bit, but certain discs have "smearing" type distortion on the s's and other sibilance. It seems to get worse the farther into the record that it plays. It also seems that the high frequency extension isn't quite there either.

I have a couple of vinyl's that have some MAJOR distortion upon playback that weren't there with my previous cartridge (a cheap Shure MM) and is really bothering me. I have included a clip of what i'm talking about.

There's a .wav file for people who have high bandwidth downloads and a high bit rate .mp3 for all others.

I cannot tell as to where this distortion is originating. What is weird is for most of the album (i have included a track where it is most pronounced) I can convert the playback to M/S and bring down the sides, this removes 90% of the distortion most of the time. I don't know what this means but it obviously only works on mono records.

I'm curious as to what anyone thinks about this. The links are posted below. Thanks in advance for taking the time to help me with this.

http://www.abdclub.com/Audio/whatdistortion.mp3 <-mp3 version

http://www.abdclub.com/Audio/whatdistortion.wav <-wav version
  Reply With Quote
Old 12th June 2009, 05:48 AM   #2
diyAudio Member
 
Join Date: Oct 2005
Location: Monroe, NC (SE of Charlotte)
Send a message via AIM to Binaural
I've also checked to see if the output from the transformers is clipping the input of the phono pre, it isn't there's still a good amount of headroom left....
  Reply With Quote
Old 12th June 2009, 08:36 AM   #3
jonners is offline jonners  United Kingdom
diyAudio Member
 
jonners's Avatar
 
Join Date: Jan 2007
Location: Cheltenham
I don't know much about your arm, but are you sure that the low-compliance DL-103 is suited to it?
  Reply With Quote
Old 12th June 2009, 08:45 AM   #4
diyAudio Member
 
Frank Berry's Avatar
 
Join Date: Sep 2003
Location: Midland, Michigan
Have you checked to make sure that the tonearm height is correct?
Does the performance improve with a little heavier tracking weight?
Increased distortion towards the inside tracks can mean that the tonearm position isn't correct.
__________________
Frank
  Reply With Quote
Old 12th June 2009, 11:33 AM   #5
jonners is offline jonners  United Kingdom
diyAudio Member
 
jonners's Avatar
 
Join Date: Jan 2007
Location: Cheltenham
Maybe the discs that have bad distortion have got groove damage that the cheap cart was somehow not resolving? Do those discs sound OK on a different system with a good cartridge, I wonder?

Or maybe your DL-103 is actually faulty? Can you try it on a different arm/TT, or alternatively can you try another DL-103 on your arm?
  Reply With Quote
Old 12th June 2009, 06:52 PM   #6
diyAudio Member
 
Join Date: Oct 2005
Location: Monroe, NC (SE of Charlotte)
Send a message via AIM to Binaural
Seems the consensus is that the tonearm doesn't have enough effective mass for this cartridge. Since it's a diy job, hopefully this shoudn't be hard to fix. Are there easy ways for increasing the effective mass? Also if I was to make another tonearm, would using denser woods increase this mass?

Frank, when you say the tonearm's position isn't correct, what do you mean? How would I adjust this?

Thanks for everyones help so far. I'm going to try some things today and report back.
  Reply With Quote
Old 12th June 2009, 07:24 PM   #7
diyAudio Member
 
Join Date: Oct 2005
Location: Monroe, NC (SE of Charlotte)
Send a message via AIM to Binaural
Also, is there any kind of "anti skate" for tangential tracking tonearms? I guess it wouldn't be necessary, or am I missing something?
  Reply With Quote
Old 12th June 2009, 09:40 PM   #8
jonners is offline jonners  United Kingdom
diyAudio Member
 
jonners's Avatar
 
Join Date: Jan 2007
Location: Cheltenham
You're right - no need for anti-skate on a tangential arm.

I doubt if using denser wood will increase the mass enough.
Maybe you can find someone who is using this kind of arm with a DL-103? Try posting on VE perhaps?
  Reply With Quote
Old 12th June 2009, 10:17 PM   #9
diyAudio Member
 
Join Date: Oct 2005
Location: Monroe, NC (SE of Charlotte)
Send a message via AIM to Binaural
Forgive my ignorance, but what is VE?
  Reply With Quote
Old 12th June 2009, 10:25 PM   #10
jonners is offline jonners  United Kingdom
diyAudio Member
 
jonners's Avatar
 
Join Date: Jan 2007
Location: Cheltenham
VE=Vinyl Engine forum.

I don't know if it's any help, but some people appear to be using the 103 with this arm: http://www.trans-fi.com/terminatortonearm.htm
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Weird e_fortier Class D 3 4th July 2008 01:16 AM
Non Linear Distortion testing - Harmonic Distortion JMB Multi-Way 0 20th July 2004 02:54 PM
weird karma Everything Else 1 26th May 2004 03:10 AM
weird karma Everything Else 8 6th May 2003 10:42 AM


New To Site? Need Help?

All times are GMT. The time now is 09:10 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2