Fun with vinyl measurements

[Balle Clorin]

More test data on the little SUT Sony HA T-10=Ortofon T-5

 

[atmasphere]

This can be calculated - in most cases for most MC's the inductances involved are so low that the actual impact is completely negiligible (and well below - order of magnitude? - the ability to accurately measure)

Yes, MCs tend to have very low inductance so if no SUT is involved, the electrical resonance can be 100KHz to 5 MHz (and a lot of phono preamps have troubles with the RFI generated, hence 'loading resistors' which are really for the benefit of the preamp rather than the cartridge.
The inductance of an SUT is an entirely different matter. One must always be careful when putting a capacitance in parallel with inductance. You may not get the results you were expecting

and you, you feel personnal,that you are no longer embarrassed from what threshold of wow-flutter?
(but the opportunity to ask, (or question to yourself), the question a little to all..
see can be associate this observation with what is essentially listening as a type of music etc. ;-) )

I'm sure if I was feeling personnal I'd embarrasing myself and also be getting in trouble with HR. My associate observed I was listening to essential music.

 

[Balle Clorin]

Something arrived from Tokyo today. So now I just need that Jico stylus…
I wonder what the faint letters in the from means…R8 or RB.


Seems to designate 1978 February

Shure Cartridges - Release Dates and Manufacturing Codes

Hello all, I've been trying to figure out the release dates of all of the top of the line Shure stereo cartridges for a project I'm working on. I...

forums.stevehoffman.tv

 

[Balle Clorin]

Some results from load tuning a cartridge.
Post in thread 'Introducing the Phono Cartridge Measurement Library'
https://audiosciencereview.com/foru...tridge-measurement-library.46108/post-1672523


Changing to my second 270cII cartridge body and using same tuning does not change much, stylus from Tonar Hypelliptical 9449 seem to respond quite similar to original, or oval stylus, or slightly better

 

[atmasphere]

How do you separate the distortion of the cartridge vs the tracking issues of the arm? Isn't it more correct to say these measurements are for the cartridge and arm combination?

 

[Balle Clorin]

You cannot play a cartridge without an arm, so the two are inseparable. But it is possible to compare results for one cartridge in different arms of course. For a reasonable good arm the cartridge should dominate the result. More important than the arm is the cartridge alignment, that can really make a difference.

 

[morillon]

How do you separate the distortion of the cartridge vs the tracking issues of the arm? Isn't it more correct to say these measurements are for the cartridge and arm combination?

if it is not a linear arm... becomes very dependent on the position of the test signal on the disc...
comparing the thd characteristics of the different discs becomes very relative.. with a constant arm-cartdrige.... especially if an arm is rather short...
and you may have to add the variables due to the antiskating, if the level of the test does not correspond to that used for its adjustment...

---

 

[atmasphere]

if it is not a linear arm... becomes very dependent on the position of the test signal on the disc...
comparing the thd characteristics of the different discs becomes very relative.. with a constant arm-cartdrige.... especially if an arm is rather short...
and you may have to add the variables due to the antiskating, if the level of the test does not correspond to that used for its adjustment...

---

Yes. At best you have a relative measurement, not one reflecting that of the media or even the transducer itself.

 

[Balle Clorin]

You have the same “problem” when you play music. If you consider it a problem play a CD and forget about vinyl…

 

[Balle Clorin]

Read somewhere that the tolerance in the SME type heashell/Bajonet fastener has sufficient play to affect the Azimuth and crosstalk. I deceided to check this and made one test recording with the headshell pushed clockwise while locking, and one with it pushed counter-clockwise. The headshell has no detectable play!! but it has an effect, look at the crosstalk...
I loaded the cartridge for maximum flatness by the way, that is why the load is far from the standard
Stylus is aluminium Hyperelliptical by Tonar Made in Japan 6449

But plots like this does not tell the full story, it has a sibilance the makes S sound like Tszz, maybe I need higher VTA for proper tracking , it passes the tracking tests at 80um but still… A Jico SAS /B should do the trick I guess

 

[JP]

I've never ran across an SME style connector that didn't have detectable play.

 

[MaxwellsEq]

Read somewhere that the tolerance in the SME type heashell/Bajonet fastener has sufficient play to affect the Azimuth and crosstalk. I deceided to check this and made one test recording with the headshell pushed clockwise while locking, and one with it pushed counter-clockwise. The headshell has no detectable play!! but it has an effect, look at the crosstalk...
I loaded the cartridge for maximum flatness by the way, that is what the load is far from the standard
Stylus is aluminium Hyperelliptical by Tonar Made in Japan
View attachment 308164

I've always been bemused by audiophiles who have a handful of multi-thousand dollar cartridges in swappable headshells which they change depending on the day of the week. I'd rather havea single good cartridge in a rigid, well-damped single-piece or bonded armtube+headshell.

 

[Balle Clorin]

I've never ran across an SME style connector that didn't have detectable play.

Thanks , makes me feel better about my cumbersome SME V..

 

[Balle Clorin]

A new Turntable , replacing the CD player that goes down a shelf, or onto storage.

 

[USER]

View attachment 309943View attachment 309941A new Turntable , replacing the CD player that goes down a shelf, or onto storage.

Nice! That's a fun new toy. The motor spindle likely needs lubrication given its age. If it is the beefier motor and has a thrust washer, check its condition. If it looks bad you may have luck flipping it over like I did.

 

[Balle Clorin]

Not sure how to lubricant it or what you mean by “luck flipping… “English is not my language, will turning it upside down give lubrication?shift oil around?

Everything seems to work and speed very near perfect based on strobe disk. It was in regular use until 6months ago, a widow sold it , possibly only one owner..

 

[morillon]

Not sure how to lubricant it or what you mean by “luck flipping… “English is not my language, will turning it upside down give lubrication?shift oil around?

Everything seems to work and speed very near perfect based on strobe disk. It was in regular use until 6months ago, a widow sold it , possibly only one owner..

1982-83
(cleaning and change of lubrication, and testing of new lubricants if it has been turned a lot seems welcome...
can be difficult on some machines of these times lubricated ads "for life" ... but the merit in general .....
runs for how long on "empty"?
the figures found are below what this type of machine should reasonably offer ;-) )

 

[Balle Clorin]

Some more data

 

[morillon]

View attachment 310017Some more data

old denon with reservoir (the case there?) can be annoying.....must take two precautions..one, keep the old oil as much as possible, because even if degraded by time, it allows you to observe its type, its viscosity etc.. and, carefully observe the original level because if of course not enough will pose problems.. too much will also pose problems
;-)

 

[Balle Clorin]

Not sure where I can observe oil level..?