The Shure V15Vx/SAS I have is between 35-40 dB in separation at 1 kHz.
Yes, but this thread is about crosstalk over frequency domain ;-)
Yes, the V15Vx/SAS is the best I've had, both measured and sound.
BTW, a link to the Ortofon test record file. It is quite poor pressing but it seems to have the best measures with respect to crosstalk.
Dropbox - Ortofon test record.wav
Se also:
Ortofon Test Record
BTW, a link to the Ortofon test record file. It is quite poor pressing but it seems to have the best measures with respect to crosstalk.
Dropbox - Ortofon test record.wav
Se also:
Ortofon Test Record
Thanks. yes agree that the quality of the record sets some limits. The Ultimate Analogue Test LP is better in some regards, but have flaws as well. I am thinking to get this one as well. It has some interesting signals that I do not have, but I could hope for higher quality.
https://www.esistemas.pt/fotos/produtos/elips-ulttechrec.pdf
https://www.esistemas.pt/fotos/produtos/elips-ulttechrec.pdf
Interesting, that looks quite good. Does anyone have it in stock?
I also found this recently The Secret Society of Lathe Trolls • View topic - Flokason test record finally out for sale. which was cut by someone who makes lathes and appears to have gone the extra mile for quality. But again can't work out how to buy it!
BTW what analysis SW are you using? My biggest issue is I am using the wrong tools. Scott will chide me for not just writing some python code, but he has the 10,000 hours head start on me there
I also found this recently The Secret Society of Lathe Trolls • View topic - Flokason test record finally out for sale. which was cut by someone who makes lathes and appears to have gone the extra mile for quality. But again can't work out how to buy it!
BTW what analysis SW are you using? My biggest issue is I am using the wrong tools. Scott will chide me for not just writing some python code, but he has the 10,000 hours head start on me there
I'll try to buy the Elipson one and see the quality. I'll be back if I succeed. The pressing plant is MPO
MPO Vinyl Manufacturer
My analysis software is Audacity and sometimes Amadeus (for mac). I often export data however and make analysis in Kaleidagraph software.
MPO Vinyl Manufacturer
My analysis software is Audacity and sometimes Amadeus (for mac). I often export data however and make analysis in Kaleidagraph software.
Thank you. Attached is one of the examples of where audacity gives a confusing result. I haven't tried high pass filtering the file to see if that helps yet, so just need to find time to hunt for samples where there is a clear peak. I only need 3 or for data points to get a view. Then I can try and measure a less good cartridge .
I found the post below from luckydog before the great purge.
I hadn't considered the self centering of the diamond, but that does make sense.
I found the post below from luckydog before the great purge.
Just to expand a little on some of the consequences that follow the graph I posted above. What matters most to crosstalk/seperation is alignment between the coils and the disc surface. This has different implications for MM and MC carts.
For MM carts, the coils are set in the body, accuracy typically depending on manufacturing jigging and internal fixings. Generally, cartridge body azimuth determines crosstalk. Even if the stylus isn't set straight on the cantilever and so rotates the cantilever slightly on setting down, rotating a MM armature generally doesn't affect crosstalk because the coils don't move and the armature is typically insensitive as to absolute rotation in an MM cart.
In an MC cart the coils sre set on the cantilever, accuracy typically depending on how accurately the stylus is set on the cantilever relative to the coils. If the stylus is not set vertically on the cantilever with dead accuracy, as is very difficult to achieve, then the cantilever and coils rotate slightly on setting down, and crosstalk is degraded.
Then if optimising crosstalk/seperation is the aim, for an MC it's best to do it by signal analysis rather than by dead levelling the cartridge body. And vica versa for MM. Either way, it can be a very sensitive adjustment.
Optimising seperation might well take the stylus off vertical then, and its a matter of which compromise is worse. Depending on manufacturing accuracy.
I hadn't considered the self centering of the diamond, but that does make sense.
Attachments
Thanks for that. I’ve seen that effect which could have two possible explanations both originating from the unpivot tonearm.
1 my player is not level at the moment. Thus any up and down-movement of the tonearm will change azimuth dynamically.
2 it may be the inherent unstability of the unipivot reacting on non- centered records. Stability was significanly improved using a 600 000 cst oil also revommended by Moerch.
1 my player is not level at the moment. Thus any up and down-movement of the tonearm will change azimuth dynamically.
2 it may be the inherent unstability of the unipivot reacting on non- centered records. Stability was significanly improved using a 600 000 cst oil also revommended by Moerch.
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