here is listening test (see also 3d English paragraph in youtube comments)
Page 72-73
Attachments
Yes, it is. If you have a trouble with translation from russian, I can try to translate these pages
Given that's your book and you probably have it in electronic format it may be easier for you to make a translation for the whole book as it looks quite interesting.Then you could choose to share it with everybody or sell it .Unfortunately none of my laptops can support installing image recognition for the moment to make a trandlation quick and easy.I'll try doing it on my phone if possible one day.
"my cartridge loading scheme (I call it Aperiodic) with 150 kohm and 25 pF input is indifferent to cartridge inductance and resistance."
The formula for the cartridge Q is Q=Rl sqrt(c/l) or =150,000 sqrt(25 pF/0.5). this is 150,000*50 * 10 to the -6. The formula for the Q is in the Radiotron Designers Handbook on page 423. The Q is about 7.5. That puts a big peak in the electrical response approximately at the resonant frequency.
The formula for the cartridge Q is Q=Rl sqrt(c/l) or =150,000 sqrt(25 pF/0.5). this is 150,000*50 * 10 to the -6. The formula for the Q is in the Radiotron Designers Handbook on page 423. The Q is about 7.5. That puts a big peak in the electrical response approximately at the resonant frequency.
50 should be sqrt(50) ~= 7, so Q ~= 1. In reality it will be reduced by iron losses, and increased by parasitic capacitance.
Whoops. forgot to take the square root of 50. That's a little more than 7. So, the Q is actually 1.5. Not such a big peak after all.
If really actually, you must keep in mind the fact that cartridge has frequency dependent effective series resistance much more than ohmic DC resistance. According to Marcel van de Gevel [table 2, page 42 of Electronics World October 2003], typical Shure V15 type III has R*=30.1 (!) kOhms @ 20 kHz (and ohmic DC 1.3 kOhms) . It is so called "iron losses" . So we can say real Q of MM cartridge at HF is negligible at all, even less than 1. And my picture of https://www.patreon.com/posts/kritichnost-lcr-68630348 in reality is even better. And "standard" 47 kOhms preamp input is a stupidity.
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Nick, its looks like post for an idiot. Im sure- all of participators here knew about this issue
Some think it's irrelevant...You don't know the exact electrical model for any mm cartrige if any...Besides 150k/25pf response look more like ringing in the upper range and vinyl is best at delivering highs in excess...you get way more highs response even if you load with 100pF a cart (any cart) that's to be loaded with 500pF...Besides you complained about record noise in the low register so you need to raise the SNR only there...and you can't go past -70db there.There's no use to have better SNR in the highs as vinyl's snr in thr highs is allready higher than typical fet input phono preamp...
Maybe your approach is better for treating tinnitus with white noise recordings or for 70+ years old men...
What your findings achieve would be loosing a balance ...you don't need too much highs, especially if trying to supress clicks and pops due to dust.
Maybe your approach is better for treating tinnitus with white noise recordings or for 70+ years old men...
What your findings achieve would be loosing a balance ...you don't need too much highs, especially if trying to supress clicks and pops due to dust.
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Not upper ringing or loosing a balance but restoring with MM cartridges as natural sound as all can be earlier heard only with MC cartridges. As you know no MC cartridge has electrical resonance in the input circuit, but for some reason (and I know why, and that is not lower MC effective tip mass) all listeners prefer the sound of the MC. My kind of correction allows you to achieve MС sound from MM cartridges (I am sure Cordell with his "Damped VinylTrak eq" and Phaedrus with his Phlux also know this hint).
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Actually Phaedrus mod needs severe damping or it will ring like hell...Mc carts do respond very high up to 100khz and they also need very agressive damping(nanofarads...Claiming now that you need that obvious mm ringing defeats the excuse I created for your complex feedback network a few pages back to which you agreed.
Make up your mind! I for one don't buy your arguments on this.
Make up your mind! I for one don't buy your arguments on this.
Simple truth is this: if you sell your thing to 1000 people for good money...my opinions don't count!
That is your local truth, not real 😏 . I have prooflink in the form of a rigorous circuit analysis and an independent listening test, and your arguments are based only on speculation and emotion.