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Introducing the Phono Cartridge Measurement Library
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I have this cart and I’m using a Parks Audio Waxwing as my phono stage. I haven’t read deeply into this thread, so forgive the maybe obvious question: Can I use these measurements to reliably adjust the frequency response of my cartridge using the adjustments available to me with the Waxwing app, or are the unknown variables between our setups going to make that futile?
That said, i think I have everything I need to take my own measurements of this cart: I have the aforementioned Waxwing digitizing the signal and running to my MiniDSP SHD (which I can interface with my Mac) and I’m practiced at using REW. I also have a Ortofon test record with sweeps. I’m keen to go to the trouble to do this—a combination of Audiophile Nervosa (a real and serious condition) and because it could be a fun and rewarding opportunity to learn something. What is the community’s advice?
OP
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Use this measurement:
Introducing the Phono Cartridge Measurement Library
es, I realize that and I did set the audio settings in Audacity to use 96 kHz sampling but now I'm not sure if it really did that correctly. There really is no distortion data past 10 kHz in my graph. I guess the combination NI Komplete Audio 2 + Audacity is not the most common here and I'm a...
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It is plus-minus 1dB using a 100ohm load. Feel free to adjust with that if you can use the same load. Not sure if it is really needed unless for archival purposes.
Unfortunately Ortofon test record has flawed frequency response sweeps so it is not recommended for that purpose. At the very least you want to use a CBS STR-100.
SHURE V15-RS
this is a made for radio shack shure v15. it was sold as unused in box. the brush looked unused and the hardware was still in the sealed bag. the body shares the same electrical specs as a v15vxmr and vstiii. the stylus is beryllium with a hyperelliptical stylus. the diamond looks a little different than other shure hyperellipticals ive had. they usually are have a narrower round shank ime.
heres a hyperelliptical from a v15v with a hardened suspension
they frequency response on this looks just like the v15vxmr i posted. no surprise there given the specs.
this is a made for radio shack shure v15. it was sold as unused in box. the brush looked unused and the hardware was still in the sealed bag. the body shares the same electrical specs as a v15vxmr and vstiii. the stylus is beryllium with a hyperelliptical stylus. the diamond looks a little different than other shure hyperellipticals ive had. they usually are have a narrower round shank ime.
heres a hyperelliptical from a v15v with a hardened suspension
they frequency response on this looks just like the v15vxmr i posted. no surprise there given the specs.
I can confirm that my original VxMR stylus look similar in fr response. This is one reason the JICO SAS/B suits these bodies well; the added resonance 10-20 kHz helps. Not so with the V-MR bodies; peaking goes into the 4-5 dB range.
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dougi
Addicted to Fun and Learning
ORTOFON CONCORDE MUSIC BRONZE
- 1.8g tracking force
- My record has a warp and refuses to be clean. Side 2 used first sweeps.
- One of the new "music" models in the DJ integrated headshell style, suitable for Technics tonearm geometry, which mine is
- Info can be found here. Fineline stylus.
- Typical? Ortofon lift at HF, two cap loadings shown. Increasing doesn't wholly help, may need resistive changes.
- fantastic channel balance!
- This is the azimuth with best HF symmetry, but xtalk then not good.
- Never seen as bad midrange "tonearm" resonances on my setup! Perhaps due to the "headshell"?
- Fluff on the cantilever that could not be removed. See below.
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OP
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So many questions! That mid-range resonance is indeed troubling. I don't recall seeing anything like that here and it is worth investigating. You may even want to see if you can get a replacement to confirm it. The idea that it could have a problem would drive me crazy and it's a legitimate reason to try out a different copy or even return it.
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dougi
Addicted to Fun and Learning
Aero's measurement at #1364 (with tilt issues) of the older concord 20 showed a hint of the resonance issues too, but I will try and at least confirm limited to the cartridge.
I would start by cleaning that needle tip. We put on good glasses. 
We unscrew the insert, take out the needles, take a toothpick on which we roll some cotton wool and remove this dirt.
We do not make any nervous movements
The needle tip should be clean.
The cartridge has a wrongly set azimuth. In a Technics turntable there is usually a lot of play in the headshell attachment to the arm, which allows for azimuth correction. Setting the correct azimuth is a pain You have to enter minimal changes and take measurements
Drama
If after cleaning the needle the measurement has such a jagged frequency response, I would return this needle to the seller.
By the way.
The bracket attachment in this model is the simplest possible, such a budget design. The bracket is pressed into a hole made in the suspension, which is made of a piece of "rubber" It probably couldn't be easier
Sometimes it helps to gently! move the bracket left, right, up and down
We unscrew the insert, take out the needles, take a toothpick on which we roll some cotton wool and remove this dirt.
We do not make any nervous movements
The needle tip should be clean.
The cartridge has a wrongly set azimuth. In a Technics turntable there is usually a lot of play in the headshell attachment to the arm, which allows for azimuth correction. Setting the correct azimuth is a pain
You have to enter minimal changes and take measurementsDrama
If after cleaning the needle the measurement has such a jagged frequency response, I would return this needle to the seller.
By the way.
The bracket attachment in this model is the simplest possible, such a budget design. The bracket is pressed into a hole made in the suspension, which is made of a piece of "rubber" It probably couldn't be easier
Sometimes it helps to gently! move the bracket left, right, up and down
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Ortofon MC Jubilee
New.
After 5 attempts to set a better azimuth, I gave up.
The Technics 1200GR2 turntable has terrible headshell mounts and the company's headshell is poor. Adjusting the azimuth is a nightmare
A good turntable cartridge, unfortunately quite expensive.
Anniversary model, no longer produced.
New.
After 5 attempts to set a better azimuth, I gave up.
The Technics 1200GR2 turntable has terrible headshell mounts and the company's headshell is poor. Adjusting the azimuth is a nightmare
A good turntable cartridge, unfortunately quite expensive.
Anniversary model, no longer produced.
Attachments
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I don't know what "file0norm = 0" is
dougi
Addicted to Fun and Learning
If you set filenorm to 0, the two channel frequency responses will be normalized to each other at 1kHz, indicated by the X there. So you can't get a sense of the channel balance. If you going into the script and set to 1, you then see the true channel balance between L&R.
I noticed that in the measured copy, in the range of about 2 kHz-5 kHz in one of the channels (red line) there is some problem with the crosstalk parameter. A different setting of the phono cartridge and a different anti-skating value does not change the value of the measurement, the red line still has large fluctuations of the crosstalk parameter. Do I understand this correctly?
You can just rerun it and update your post(s).
Resonances in the cartridge/arm.
There is no such problem in the previously performed measurement of the Ortofon MC 5000.
In my opinion, the problem concerns only the phono cartridge.
I took a closer look at the cantilever in this specimen, using a magnifying glass, I can see that the cantilever is not glued perfectly straight. The connection of the boron cantilever with the aluminum element of the cantilever is made with additional transparent glue.
It looks as if this element was simply repaired, and it was not the original factory connection.
I have a second copy of this model, it was purchased directly from Ortofon. I checked under high magnification, the connection of the boron cantilever with the metal element is made without the use of transparent glue, the cantilever is glued perfectly straight.
I will measure this specimen in some time.
I filed a complaint with the seller.
In my opinion, the problem concerns only the phono cartridge.
I took a closer look at the cantilever in this specimen, using a magnifying glass, I can see that the cantilever is not glued perfectly straight. The connection of the boron cantilever with the aluminum element of the cantilever is made with additional transparent glue.
It looks as if this element was simply repaired, and it was not the original factory connection.
I have a second copy of this model, it was purchased directly from Ortofon. I checked under high magnification, the connection of the boron cantilever with the metal element is made without the use of transparent glue, the cantilever is glued perfectly straight.
I will measure this specimen in some time.
I filed a complaint with the seller.
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