Fun with vinyl measurements

[Balle Clorin]

Something to correct Jico VTA with. A 5 degree shim …my Jico has 28degree

 

[Thomas_A]

Something to correct Jico VTA with. A 5 degree shim …my Jico has 28degree
View attachment 422800

I made my own shim about 7 degree. Works fine!

 

[morillon]

Something to correct Jico VTA with. A 5 degree shim …my Jico has 28degree
View attachment 422800

the materials? magnesium?
;-)

 

[Balle Clorin]

3D printed plastic:? the strange thing is that when I tried it on a AT95E the SRA looks the same …visually , but crosstalk becomes worse. After adjustment

Post in thread 'Analog Magik'
https://www.whatsbestforum.com/threads/analog-magik.25735/post-1025324

 

[melloncolliecat]

Can you spot the difference between 1000 and 1015 Hz in the freqency plot? And if was spinning at exactly 33,33 RPM - in the same frequency plot, could you tell the difference in amplitude between 1000 and 1015 Hz?

Heh, the question was deleted. Moving on...

 

[Aero]

Something to correct Jico VTA with. A 5 degree shim …my Jico has 28degree
View attachment 422800

Can you spot the difference between 1000 and 1015 Hz in the freqency plot? And if was spinning at exactly 33,33 RPM - in the same frequency plot, could you tell the difference in amplitude between 1000 and 1015 Hz?

1015 Hz / 1000 Hz x 33.33 = 33.83 Rpm
If the RPM is too fast, it may be audible.
Will this affect the frequency response? I don't know

 

[melloncolliecat]

1015 Hz / 1000 Hz x 33.33 = 33.83 Rpm
If the RPM is too fast, it may be audible.

Do you ever answer, or even understand, follow-up questions?
Yes, an 0.5 RPM difference is likely very much audible (although some people are a lot more sensitive to pitch differences than others). But that's not the point of these frequency plots.

 

[morillon]

passing 0.1% (0.03rpm) pitch is already a lot (and joins the idea of hardly exceeding +-0.05% rms of jitter)

 

[morillon]

Do you ever answer, or even understand, follow-up questions?
Yes, an 0.5 RPM difference is likely very much audible (although some people are a lot more sensitive to pitch differences than others). But that's not the point of these frequency plots.

It's unthinkable as a speed +1.5% ;-)

 

[Balle Clorin]

?? What is going on here now? I cannot follow … since some post disappear

 

[Aero]

?? What is going on here now? I cannot follow … since some post disappear

I asked if the turntable is spinning too fast (or too slow) - 33.82 RPM and instead of reproducing the sound of 1000 Hz, it reproducing the sound as 1015 Hz, will this affect the measurement of the frequency response of the turntable cartridge. I ask because I don't know.

 

[JP]

As the groove velocity is faster the stylus velocity is greater, and thus there will be an increase in signal, though in this case very small. However, as the increase would be consistent, the same increase applies across the board. So no, no it won't affect the measurement outside of shifting the overall frequency range.

 

[Balle Clorin]

I have a certain Blip/peak in my OC9 cartridge, if the speed is not the same between runs the blip changes horisontal position in the plot… in the same way any resonance peak will have a tiny shift with inconsistent speed

 

[JP]

Files?

 

[Aero]

As the groove velocity is faster the stylus velocity is greater, and thus there will be an increase in signal, though in this case very small. However, as the increase would be consistent, the same increase applies across the board. So no, no it won't affect the measurement outside of shifting the overall frequency range.

Thank you for your competent answer.
As a reward, I am posting the frequency response (computer-generated, which was new at the time) that Shure includes with the V15 Type V models.

 

[Aero]

I bought another model like that, the manufacturer also included a frequency response, but I'm currently banned from publishing it

 

[Balle Clorin]

What does AnalogMagik say about 4 different set ups . The first setup from the left is a technics 270Cii cartridge + stylus Tonar hyper elliptical , set up visually with no other adjustments, The AT95E is setup visually + Azimuth adjusted with AnalogMagik, the two others are set up visually and Azimuth set up by Toshiba LF-90001.

If some other AnalogMagik owners could post their results, particularly version 2 Pink noise track to see tonearm response, I will he grateful.The 80hz resonance is quite large in the thin Denon 51F arm, but other records to not show this to the same extent or nothing at all

AM33V2 pink noise

 

[Balle Clorin]

500 000 usd blind test

https://www.avsforum.com/threads/500-000-vs-78-turntable-blind-test.3237117/

 

[Balle Clorin]

Mo-Fi Does the "One Step" With Paul Simon's Still Crazy After All These Years

Seven years ago (2014) Sony/Legacy reissued for Record Store Day a swell version of Paul Simon's Still Crazy After All These Years, mastered by Ryan K. Smith at Sterling Sound and pressed at RTI. It was positively reviewed on this site.

www.analogplanet.com

 

[JP]

@Balle Clorin, per a comment on another forum, have you noticed or verified if the Shaknspin combines "yaw" in the measurement? Strikes me as a rather weird thing to do - I missed the part in the standards that W&F should include runout, warps, etc.