Introducing the Phono Cartridge Measurement Library

[Bob from Florida]

Looks really fine except for distortion. -20 dB at 5k is a bit high. The best cart+stylii give below -30 dB at 5k.

There are better styli for that cartridge body.

 

[Balle Clorin]

Yes recorded as line-in without riaa curve active

 

[Balle Clorin]

There are better styli for that cartridge body.

which one, 95EX I know of, but are there others?

 

[Bob from Florida]

which one, 95EX I know of, but are there others?

I saw 95 and thought of VM95.

 

[somebodyelse]

which one, 95EX I know of, but are there others?

95SA - at least I think it was for the same body.

 

[Bob from Florida]

Yes recorded as line-in without riaa curve active

What's the logic behind turning off the RIAA? I thought the implementation via digital filters was for all intents and purposes ideal.

 

[Balle Clorin]

Most test records sweeps are recorded without RIAA, or the with RIAA only below 1000hz. So recording flat gives the actual cartridge response ,- and not the cartridge + RIAA amp combined.

 

[Bob from Florida]

Most test records sweeps are recorded without RIAA, or the with RIAA only below 1000hz. So recording flat gives the actual cartridge response ,- and not the cartridge + RIAA amp combined.

So, the CA TRS1007 is not recorded with RIAA?

 

[Jimi Floyd]

So, the CA TRS1007 is not recorded with RIAA?

Same question here, the CA TRS1007 sweeps are RIAA-encoded or not? would like to know the answer, thanks.

 

[USER]

Same question here, the CA TRS1007 sweeps are RIAA-encoded or not? would like to know the answer, thanks.

No RIAA.

 

[JP]

They have turnover.

 

[mackat]

Technics EPC-205C-IIL

Original stylus, unknown hours of use, cantilever slightly off-center:

JICO SAS with very little use, secured with Blu-Tack, as without it is slightly loose:

 

[dlaloum]

Technics EPC-205C-IIL

Original stylus, unknown hours of use, cantilever slightly off-center:

View attachment 361666

JICO SAS with very little use, secured with Blu-Tack, as without it is slightly loose:

View attachment 361667

The technics performance is a bit disappointing - that high end droop should be fixable with loading adjustment...

 

[mackat]

The technics performance is a bit disappointing - that high end droop should be fixable with loading adjustment...

I have a feeling that at least some of that may have to do with the specific stylus example I have. It may not have been kept in the best environmental conditions in Japan.

At some point, I will pick up an NOS EPS-205EX and measure it.

Additionally, the EPC-205C-IIL model is very low inductance (40 mH)/impedance, as far as I understand to be relatively immune to loading variables.

 

[mackat]

Shure V15 Type III MR

Looks pretty flat

 

[melloncolliecat]

JICO SAS with very little use, secured with Blu-Tack, as without it is slightly loose:

View attachment 361667

Are the Jico SAS styli for the Technics 205 all the same or do they differ for the various cartridge bodies?

 

[Thomas_A]

Technics EPC-205C-IIL

Original stylus, unknown hours of use, cantilever slightly off-center:

View attachment 361666

JICO SAS with very little use, secured with Blu-Tack, as without it is slightly loose:

View attachment 361667

This one seem to need 400-600 pF

 

[dlaloum]

This one seem to need 400-600 pF

It will take a LOT of C given the 40mH inductance!

 

[Col. Panic]

I've attached the code here - just change the extension from ".txt." to ".py". (It looks like the this form doesn't let you upload .py files.) It's just a few tweaks and point solution for this specific task. If there's interest I can modify it to accept an arbitrary number of files and plot them against each other. Let me know if folks would find that useful.

After another evening's work, I wasn't able to make much improvement on the the Rainer response. I can minimize cross-talk adjusting azimuth, which lands me just about where I started. For the frequency response dip between 5 and 10 kHz, I can make up about 0.5 dB with my preamp's maximum capacitive load of 200 pF, but it's a drop in the bucket on the 2 dB problem. I've attached my some documentation on my process in case it's useful to anyone or if anyone has any advice. For now, I think it's as good as I can get it and will slap an EQ on it to fix what's left.

Thanks all, for your help so far!

 

[mackat]

Denon DL-103

This one I purchased new in 2020. It shouldn't have more than 30 or so hours of use, I believe. I wonder what's behind the glitch at ~11k. It is repeatable.