Azimuth adjustment the easy way...

Jul 8, 2011
299
0
0
ttsetup.com
#61
I dialed in an arm the other day using Adjust+ in 3 tries, nailing it in 15 or 20 minutes. Sometimes 4 to 6 tries are needed. With experience you know which way things go. Usually the slopes are much less steep than the ones posted above by MPS, sometimes with funky behavior that makes it more challenging. I'm very patient.
 

MPS

New Member
Jun 20, 2016
25
0
1
Finland
#62
Yes, slopes are much less steep in reality if angle degrees are properly set.

I didn't have possibility to adjust headshell in degrees, what I did is I adjusted cartridge in headshell by adding spacers (shims) between. For reference I set one spacer equal to 0.5 degrees so 2 degrees would mean 4 spacers.
It will be more easy with tonearm which has azimuth adjustment or possibility to rotate headshell. Using spacer any cartridge can be azimuth adjusted in any tonearm, shims are pretty standard method in mechanical engineering.
 
#65
I didn't have possibility to adjust headshell in degrees, what I did is I adjusted cartridge in headshell by adding spacers (shims) between. For reference I set one spacer equal to 0.5 degrees so 2 degrees would mean 4 spacers.
That's fine of course, it doesn't matter if the steps are 0.4, 0.5 or 0.6 degrees. It's just easier if the steps are equal. All that matters is to find the crossings and to know how to get back to that position.

Using spacer any cartridge can be azimuth adjusted in any tonearm, shims are pretty standard method in mechanical engineering.
Yes. I would only consider the tonearm damping. Putting shims right at the contact area may result in a recoil effect.
 

MPS

New Member
Jun 20, 2016
25
0
1
Finland
#66
That's very true. Any shim or anything as a matter of fact between headshell and cartridge will have impact on sound signature of the combination.
I preferred plastic shims over metallic ones and ended up using damping layer of approximately 1,5mm in between with one side shimmed with 0,4mm plastic washer. I find this combination to be improvement over direct cartridge headsell contact. Maybe it works to dampen resonances of SME V which I guess are in the kHz range however minuscule they may be and Lyra's titanium body being highly rigid and thus "conductive" for external vibration and transferring vibrations to arm tube as well.
There is never a one single solution that is optimal for every system but rather a system specific combination of properties, then we can go on with personal preferences...
 

number95

New Member
May 14, 2014
380
0
0
#68
Thumbs up for Dr. Freickert Adjust +

I can't see a better and more accurate way do adjust cartridge azimuth. Oscilloscope can do the same thing but Adjust+ gives clear graphical presentation of each adjustment to make each step logical.
Fixed tonearms such as SME V can still be used if cartridge is adjusted with shim plates, washers or something similar. These will make difference in sound as well so please experiment a bit.
+1

Last but not the least, Adjust+ gives another option of adjusting azimuth via phase angle difference between L/R channels. I find it quite useful and with some cartridges when the graphs of Adjust+ have proven that there have been divergence between cross talk and phase angle ie when you optimize the cross talk, phase angle had huge difference vice versa, it was better to optimize via phase angle or finding some angles which both phase angle and cross talk differences were very small.
 

awsmone

Active Member
Apr 7, 2014
1,062
3
38
Canberra Australia
#69
Just thinking

If you place a mono set frequency track

If you reverse the pins on a stereo cartridge on one channel

If the output of both channels of the cartridge are equal

Won't the azimuth point be the point of maximum muting of the tone ?

Just checking

Thx
 
Jul 8, 2011
299
0
0
ttsetup.com
#71
+1

Last but not the least, Adjust+ gives another option of adjusting azimuth via phase angle difference between L/R channels. I find it quite useful and with some cartridges when the graphs of Adjust+ have proven that there have been divergence between cross talk and phase angle ie when you optimize the cross talk, phase angle had huge difference vice versa, it was better to optimize via phase angle or finding some angles which both phase angle and cross talk differences were very small.
Yes, I've been saying this for years. My results speak for themselves.
 
#72
Anyone have more information on exactly how the THD measurement is done in Adjust+?
There's very little information about it, and I never succeeded to get clear info from Chris. It's a secret.
The measurement is not really useful unless you know how and what it measures.
To start with the track velocity is 11.3cm/s. That alone means more than 7dB above normal reference.
I have a hard time evaluating this test...:confused:
 
Last edited:
#73
I made prints from the manual:

thd-manual-01.jpg.0258b7b5c70701caf9b121c84eeae47d.jpg

thd-manual-02.jpg.a4305c40cac5e0e7376a237390c8e391.jpg

I still don't get it.
Using the values for K1-K5 in his example i get THD -42dB (0.75%), not -38dB (1.17%) for the right channel.

THD = SQRT [ (10^K2/20)^2 + (10^K3/20)^2 + (10^K4/20)^2 + (10^K5/20)^2 ] / 10^K1/20

I also think 20xLOG(11.3/5.0)=7dB should be deducted to get a more comparable/standardised measurement. No?
I.e. in the above example, it would make more sense to show THD -49dB (0.34%) @1kHz re 0dB 5cm/s.

I know we should not rely too much on this measurement, but since it's there it should be understood.
 
Last edited:

About us

  • Founded in 2010 What's Best Forum invites intelligent and courteous people of all interests and backgrounds to describe and discuss the best of everything. From beginners to life-long hobbyists to industry professionals we enjoy learning about new things and meeting new people and participating in spirited debates.

Quick Navigation

User Menu

Steve Williams
Site Founder | Site Owner | Administrator
Ron Resnick
Site Co-Owner | Administrator
Julian (The Fixer)
Website Build | Marketing Managersing