Introducing the Phono Cartridge Measurement Library

[essence]

AT-VM95ML

• Reloop RP7000MK2 (super oem) turntable
• Cart brand new <1h usage, pre-assembled w/ AT-HS6BK headshell
• CBS STR100 Issue3 is NM condition
• reloop line out > e1da ADC 1.7v

 

[essence]

AT-OC9XML w/ LH11H

Notes

• New cart <3hour usage
• Reloop 7000MK2 turntable
• Mounted on AT-LH11H headshell
• 2g tracking force
• 2x e1da apu as phono, unbalanced 23.5k load 100pf
• cables 182pf + 150pf turntable (from rcas to headshell terminals)
• CBS STR100 issue3 test record NM condition

After some troubleshooting it seems one my apus has +20db~ noise with the stylus in the air, the slight channel mismatch is due to this as well. I'll update the measurement when I get the issue fixed.

 

[USER]

Ah, man. I was hoping to measure a NOS Empire 888TE from 1968 as a sort of build-up to measurements/discussion regarding hyperellipticals (and how I don't understand why zombie ellipticals still dominate the market).

But, once again, I am out of luck. I am thinking these guys are reaching the end of their lifespans. I'm seeing too many broken cantilevers. This is a very good reason to measure one now.

So how about some pretty pictures of what could have been? If anyone has any good leads...

 

[Alex___]

AT VM540ML

Notes

• AT VM540ML <70hour usage
• Technics SL-M1 turntable
• 2g tracking force
• Preamp Denon PRA-2000
• ADC Motu M4
• cables 110pf + 30pf preamp=140pf. 35kOhm (input impedance)
• ISM 0327 test record NM condition (ИЗМ 0327)
• Script 17.0.

and the same file from the rew:

Spoiler: REW

 

[USER]

AT VM540ML
View attachment 387163
Notes

• AT VM540ML <70hour usage
• Technics SL-M1 turntable
• 2g tracking force
• Preamp Denon PRA-2000
• ADC Motu M4
• cables 110pf + 30pf preamp=140pf. 35kOhm (input impedance)
• ISM 0327 test record NM condition (ИЗМ 0327)
• Script 17.0.

and the same file from the rew:

Spoiler: REW

View attachment 387166

Interesting test record.

The frequency response below 10kHz is much like that on my DIN 45 543, which is my best test record for wow and flutter crosstalk. Above that it falls apart as it should look more like mine in terms of a smoother curve.

However, you can see that the cartridge went past the limits of my test record for crosstalk results. Yours presents it nicely. If you look at my "ghost center" result at 1 kHz we pretty much match there. Nice record!

 

[Alex___]

Interesting test record.

The frequency response below 10kHz is much like that on my DIN 45 543, which is my best test record for wow and flutter. Above that it falls apart as it should look more like mine in terms of a smoother curve.
View attachment 387192
However, you can see that the cartridge went past the limits of my test record for crosstalk results. Yours presents it nicely. If you look at my "ghost center" result at 1 kHz we pretty much ma

Thank you!
yeah i liked this test record too. it was made about 35-40 years ago and was still in storage so it's in like new condition.

Пластинка для измерения частотных характеристик, разделения между стереоканалами и чувствительности стереозвукоснимателей

records.su

 

[aaaakkkk]

Thank you!
yeah i liked this test record too. it was made about 35-40 years ago and was still in storage so it's in like new condition.

Пластинка для измерения частотных характеристик, разделения между стереоканалами и чувствительности стереозвукоснимателей

records.su

These test records (izm 0327) are printed from different matrices, after "izm 0327" comes the name of the matrix, each version of the matrix has its own frequency response and channel separation. I have more than 10 such LPs, with different matrix numbers, and I compared them with each other.

 

[Alex___]

These test records (izm 0327) are printed from different matrices, after "izm 0327" comes the name of the matrix, each version of the matrix has its own frequency response and channel separation. I have more than 10 such LPs, with different matrix numbers, and I compared them with each other.

yes, I also bought 3 of these plates with 2-7 matrices. There are no big differences. But I am confused by the differences compared to the REW program. In REW, the files show a difference of +1 dB at high frequencies (5-17 kHz) and -1 dB at low frequencies (30 Hz-100 Hz), compared to this script v.17.

 

[USER]

So if things work out I think I am fulfilling a weird dream this month and measuring a Crosley-style Victrola turntable --lol! I hope I am not jinxing things!

But seriously, I've really wanted to measure a Chuo-Denshi CZ-800 ceramic cartridge, which I think is essential to this library. I hope to post an audio sample too. Obviously my good test records are not coming anywhere near it. Hahaha. Luckily I can compensate for my battlefront ready CBS records somewhat.

 

[Balle Clorin]

Maybe we should start a Turntable Library ?
1KHZ pilot tone from CA TRS-1007 ..or some WF track , the noise floor and peak shoulders that will reveal resonances and irregularities from Arm and turntables

 

[USER]

Maybe we should start a Turntable Library ?
1KHZ pilot tone from CA TRS-1007 ..or some WF track , the noise floor and peak shoulders that will reveal resonances and irregularities from Arm and turntables

My CA TRS-1007 is not touching that turntable but I have numerous other test records that I don't value highly and yet may have a decent enough 1kHz track. I'll see what I can do. It's a good idea.

 

[Balle Clorin]

A reaIIy cheap (1-5usd) but OK test record for 1khz or 3kHz L R and( very good) crosstaIk is Toshiba LF-90001

https://www.discogs.com/release/11646068-Various-Professional-Series-Vol1-Hearing-Test-Record

Spoiler: TT anaysis

Tohsiba has a cIean 1000Hz

Some wow on 3000hz

The Iow frequency sweep from Tohiba reveaIs arm resonance at 80Hz on Denon my 51F

Compared with SME V bIue

'

A 3000HZ from a Sony Tonearm test record 45rpm

Using run in groove to anayze 2 TT with same arm and cartridge

 

[Balle Clorin]

60 cartridges testes here with JVC TRS-1007, not the outer track , BUT the INNER.
Does anyone have a linear cartridge and can post the outer vs inner response ?then we could compare the curves better, I expect the inner track to be more rolled off..

https://www.worldradiohistory.com/UK/Hi-Fi-Choice/1983-1989/Hi-Fi%20Choice%20Iss.%20043%20Cartridges%20&%20Turntables%201985.pdf

Shure V15 V MR as a reference

 

[JP]

That’d depend on the stylus minor radius.

 

[mglobe]

Maybe we should start a Turntable Library ?
1KHZ pilot tone from CA TRS-1007 ..or some WF track , the noise floor and peak shoulders that will reveal resonances and irregularities from Arm and turntables

I've been thinking about exactly that too.

 

[morillon]

60 cartridges testes here with JVC TRS-1007, not the outer track , BUT the INNER.
Does anyone have a linear cartridge and can post the outer vs inner response ?then we could compare the curves better, I expect the inner track to be more rolled off..

https://www.worldradiohistory.com/UK/Hi-Fi-Choice/1983-1989/Hi-Fi%20Choice%20Iss.%20043%20Cartridges%20&%20Turntables%201985.pdf

thank you...!
(I even discovered a brand! "rata")

 

[Balle Clorin]

That’d depend on the stylus minor radius.

In some of the versjons of these annual reports it is mentioned a 3db drop..without any more specifics

 

[narud]

Audio Technica AT440MLB

picked this up because it was advertised as low hours. seller estimated 50-60. diamond looks pretty good. the last time i had a 440mla, the only stage i had was a clearaudio nano with 220pf of input capacitance, so i was curious to see what i could get now. Table is a technics 1300mk2 with 80pf in the leads/arm and an art dj pre with an input cap removed so its on the "0pf" setting. im sure theres still capacitance in the circuit. either way, much lower than i was ever able to get in the past. not much different of a high end peak than i get with my 150mlx, 150sa, or signet am50. maybe a db hotter in the highs?

 

[narud]

That’d depend on the stylus minor radius.

have you ever measured the difference in inner/outer with a v15vmr?

 

[aaaakkkk]

That’d depend on the stylus minor radius.

I read that the small radius of the cutter used to cut the lacquer disc is 5 microns. And as I understand it, due to the peculiarities of the production process, on the last tracks there is always a drop in high frequencies, on the CA TRS-1007 it is 6 dB at 20 kHz. Sometimes the one who cuts the lacquer uses an equalizer and gradually raises the high frequencies.