Introducing the Phono Cartridge Measurement Library

[Balle Clorin]

HYPEREL 6445 VTA,SRA
View attachment 338361
I commented on this photo

The seller giving me a carefully checked replacement, so I am happy

 

[JP]

How do you cope with having to setup the lot of them perfectly before making a final measurement with high confidence? Asking for a friend...

Worst thing I ever did was to add crosstalk to the plot.

 

[JP]

I am finding it hard to resist the urge to buy an Empire 4000 D/III. Hopefully someone here already has one.

Supposed NOS 4000D/III should be here in a few weeks.

 

[red_delta]

MP-110

Notes

• Cartridge: Nagaoka MP-110
• Stylus condition <50hrs on vinyl
• Test record: CBS STR100 issue 3
• Turntable: Fluance RT82 Stock
• Tracking force: 1.85g
• Phono stage: Schiit Mani 2
• Capacitance- Unknown, likely around 210pF
• Rip kindly provided by a friend who I sent the record to

 

[USER]

MP-110
View attachment 340614

Notes

• Cartridge: Nagaoka MP-110
• Stylus condition <50hrs on vinyl
• Test record: CBS STR100 issue 3
• Turntable: Fluance RT82 Stock
• Tracking force: 1.85g
• Phono stage: Schiit Mani 2
• Capacitance- Unknown, likely around 210pF
• Rip kindly provided by a friend who I sent the record to

Good to have this posted. Thanks. I'll update the index this week with the new ones from last month.

 

[aaaakkkk]

Worst thing I ever did was to add crosstalk to the plot.

Is there any way to make the distortion scale manually adjustable, or limit it to reasonable limits. for example 60 dB. ?

 

[Balle Clorin]

Yes. Plotstyle 1 and set limit as below


ovdylim = 1
ovdylimvalue = [-60,5]

 

[JP]

Is there any way to make the distortion scale manually adjustable, or limit it to reasonable limits. for example 60 dB. ?

You can hack it - for plot styles 2 and 4 add the below line under their sections:

 axtwin.set_ylim(-60,5)

Adjust the limits to whatever suits.

 

[SeriousSeri]

Worst thing I ever did was to add crosstalk to the plot.

I absolutely understand why , then again - for me this is one of the most, if not THE MOST important parameter. I also had my fun with this. Taking numerical values at given points was my route for easier comparability and coping

 

[mackat]

Technics EPC-205C-IIL Jico SAS Boron

This one was a little loose fitting to the cartridge body, so a bit of Blu-Tack was used to keep it snug.

 

[aaaakkkk]

Technics EPC-205C-IIL Jico SAS Boron

This one was a little loose fitting to the cartridge body, so a bit of Blu-Tack was used to keep it snug.

View attachment 341393

An amazing result for the STR-100. I wonder what the real SRA of this JICO SAS is.

 

[Balle Clorin]

The SRA if my Jico is correct but The VTA of the SAS B for my Shure V15 IV is 30 degrees and gives uneccessary 2% intermodulation distortion when a proper angle would give <0,5% . Why Jico does this I do not understand. I will never by a Jico SAS again, the answer I get when I ask Jico about this is nonsense….

Post in thread 'Introducing the Phono Cartridge Measurement Library'
https://audiosciencereview.com/foru...tridge-measurement-library.46108/post-1830454

 

[mackat]

Shure V15 Type IV Jico SAS Boron

 

[Balle Clorin]

Interesting difference , does not like mine at all..I will try a different RIAA with lower capacitance

 

[narud]

Shure V15 Type IV Jico SAS Boron

View attachment 341476

interesting. would some extra capacitance help with that dip?

 

[mackat]

View attachment 341519Interesting difference , does not like mine at all..I will try a different RIAA with lower capacitance

At least part of the difference is due to some degree of dip inherent to the STR-100 record, from what I understand.

 

[cerx]

Nagaoka MP-110

another example of the MP-110

Notes:
Stylus has in the order of 100h playtime
Headshell: Jelco HS-25 style which allowed to optimize azimuth
Test record: STR100 3rd
Turntable: Pioneer PLX-1000
Tracking force: 1.75g
Phono cable + turntable wiring 65pF
Phone Preamp: ART DJPREII set to +100 pF
A/D converter: Nuforce DDA120 amplifier

 

[Thomas_A]

The SRA if my Jico is correct but The VTA of the SAS B for my Shure V15 IV is 30 degrees and gives uneccessary 2% intermodulation distortion when a proper angle would give <0,5% . Why Jico does this I do not understand. I will never by a Jico SAS again, the answer I get when I ask Jico about this is nonsense….

Post in thread 'Introducing the Phono Cartridge Measurement Library'
https://audiosciencereview.com/foru...tridge-measurement-library.46108/post-1830454

I think the angle of the cantilever is already determined by the cartridge (the shank of the stylus assembly fitted into the cartridge is already fixed). An aluminum stylus has a flat end which will cause a difference angle from stylus tip to pivot compared to a sold boron stylus that is straight to the end of the stylus. Would be interesting if you measured the other stylus as well (both cantilever and tip to pivot), when you get a new one ( the one you showed had a sagged suspension). If the stylus angle is the same, it is the tip to pivot that is changed (due to different cantilevers).

(I would really like to see a method for the contribution of VTA distortion on normal records other than the lateral test IMD record result. I find the distortion in the high end most problematic with vinyl and for that I find the JICO SAS/B as excellent.)

 

[red_delta]

Interesting, I have always read that the MP-110 was extremely sensitive to VTA and azimuth. I would guess that is the main reason for the large difference between our results @cerx

 

[cerx]

I suspect it's mainly azimuth. Same cartridge and stylus on a non-adjustable headshell looked like this: