Fun with vinyl measurements

[Jimi Floyd]

W&F Analyzer

myhi.fi

Still a work in progress... https://www.audiosciencereview.com/forum/index.php?threads/the-w-f-analyzer-project-uberrimus.70099/

GREAT! Thanks again.

 

[Jimi Floyd]

W&F Analyzer

myhi.fi

Still a work in progress... https://www.audiosciencereview.com/forum/index.php?threads/the-w-f-analyzer-project-uberrimus.70099/

Thank you JP, another gift from you I am enjoying a lot after the cartridge frequency response tool. One more thing, is there any clean way to print the W&F plots produced by the web app? Have a nice day!

 

[Balle Clorin]

Snipping tool in Windows, but why print?, I take a Snip and paste into PowerPoint where I document my work..

 

[JP]

Thank you JP, another gift from you I am enjoying a lot after the cartridge frequency response tool. One more thing, is there any clean way to print the W&F plots produced by the web app? Have a nice day!

At some point it will. Want to get the metrics sorted first. That has been an interesting journey.

 

[Thomas_A]

Heat treated Thakker belt.

Before:

After:

 

[Balle Clorin]

Wow, cooking works. As the old Michell forum also discussed

 

[Thomas_A]

I placed the belt around a kitchen bowl to keep it circular and submerged in ≈80° water for about 15 min. It was quite much smoother in the finger hanging test. But it seems to be another material (butyl rubber?) than the Linn neoprene belt.

 

[Thomas_A]

Same treatment new Linn neoprene belt.

Before:

After:

 

[Jimi Floyd]

Heat treated Thakker belt.

Before:

After:
View attachment 522963

WOW

 

[Jimi Floyd]

Snipping tool in Windows, but why print?, I take a Snip and paste into PowerPoint where I document my work..

sorry, I said printing but I was thinking how to get a pdf file...

 

[JP]

Anyone want to help sanity-check this? https://docs.myhi.fi/tools/groove-geometry.html

It's reversed-engineered from a couple screenshots of LD's "groovy" spreadsheet, some clues from Yosh's site, and AI.

 

[Thomas_A]

Anyone want to help sanity-check this? https://docs.myhi.fi/tools/groove-geometry.html

It's reversed-engineered from a couple screenshots of LD's "groovy" spreadsheet, some clues from Yosh's site, and AI.

Will look at it in the week-end.

 

[Thomas_A]

Anyone want to help sanity-check this? https://docs.myhi.fi/tools/groove-geometry.html

It's reversed-engineered from a couple screenshots of LD's "groovy" spreadsheet, some clues from Yosh's site, and AI.

On the phone I can’t change stylus dimensions. Fixed at 5.

 

[JP]

On the phone I can’t change stylus dimensions. Fixed at 5.

Wasn't fixed at 5, but the field wouldn't let you clear it completely. Fixed.

 

[Balle Clorin]

first try with rejuvination with LiquiMoly- power steering leak stop-

before..

will have to wait and see now

 

[Thomas_A]

Wasn't fixed at 5, but the field wouldn't let you clear it completely. Fixed.

I don't really know what to put in for static and dynamic compliance when it is given only one value for e.g. 10 Hz.

 

[morillon]

first try with rejuvination with LiquiMoly- power steering leak stop-

before..
View attachment 524106


will have to wait and see now
View attachment 524105

I didn't know that...interesting!
(It seems that there is also an interesting product of this kind at Bardahl)

 

[Thomas_A]

So I've been playing around with my older Shure V15Vx body, installed it on my 4 g arm wand, set it with the arc protractor and tested 5 stylii with the Sperling record. Three JICO SAS B (new and two old ones), JICO SAS Z (hardly used), and original Shure. Conclusion is that stylii differs...

First off the current, quite new JICO SAS B stylus:
View attachment 512357

Stylus 2, JICO SAS B.
View attachment 512359
Stylus 3, also a JICO SAS B, aged.
View attachment 512360
JICO SAS Zirconium, hardly used:
View attachment 512362

Original Shure beryllium/MR stylus. Worn and slightly skewed cantilever (towards R channel).
View attachment 512363

I just want a make a note on this as a follow-up. For an image shift to happen in the phantom image, the limit is around 10 µs shift around 1000 Hz, according to some publications I've read. During optimum conditions. This corresponds to a phase shift of 3.6°.

 

[JP]

I don't really know what to put in for static and dynamic compliance when it is given only one value for e.g. 10 Hz.

You threw me for a sec - you're talking about the tonearm LF mechanics calculator now. Dynamic you can use 10Hz or 100Hz values. Static is more difficult as it's not published reliably. For that you have to back in to an approximation by seeing if other outputs make sense, like the damping ratios, min VTF for edge-case tracking, etc.

 

[Thomas_A]

You threw me for a sec - you're talking about the tonearm LF mechanics calculator now. Dynamic you can use 10Hz or 100Hz values. Static is more difficult as it's not published reliably. For that you have to back in to an approximation by seeing if other outputs make sense, like the damping ratios, min VTF for edge-case tracking, etc.

Yes, sorry, you are producing so many apps now.I think the results with the Groove geometry app are in the ballpark when comparing to the Sperling record for the Groove Geometry.. Tracing distortion goes from about 0.25 to 1 % for a 1 kHz signal, at ≈2.5 cm/s. Below.

I am sure how I use the LF mechanics without numbers. I get the resonance in the ballpark (9-10 Hz) but I can't really say anything about amplitude without spec of the cartridge.