focused on purchasing a new turntable... SNR >70db

[DSJR]

when using low input capacitance 25pF not 150pF with 150k not 47k input resistor, all MM carts are much better, see attached file

Not sure any turntable system including exit cables and typical RCA plugs can offer much less than 100pF, but I'm happy to be proved wrong here

I had an idea, looking at various measurements over the years, that the 2M range had a slight rise over 10kHz before rolling off above 20-odd kHz, this a little more of a lift than the previous 'Super OM' design. Maybe these plots I've seen here and there were all with >200pF total load (47k as standard)

 

[Balle Clorin]

see page 25 and 28

https://dn721902.ca.archive.org/0/items/stereoplay-1980-heft-10/Stereoplay%201980%20Heft%2010.pdf

 

[Nick_Sukhov]

but I'm happy to be proved wrong here

see my input construction = 13 pF of JFE2140 + 12 pF tonearm inside capacitance [ https://photos.app.goo.gl/javBYZAPYhV3otiEA ] [ https://photos.app.goo.gl/DY67YWVJQL8QCjz8A ] [ https://www.patreon.com/posts/otsenite-tekst-90783025 ]

 

[Nick_Sukhov]

see page 25 and 28

today is 2025 not 1980 / we have much better circuit ideas and input JFETs / listen for yourself

 

[dennis h]

when using low input capacitance 25pF not 150pF with 150k not 47k input resistor, all MM carts are much better, see attached file

So you have measured every mm cartridge past and present and have the data to back this statement up?

 

[Nick_Sukhov]

So you have measured every mm cartridge past and present

No, only 1/3 of modern MMs with effective tip mass less 0,3mg [ https://www.audiosciencereview.com/forum/index.php?threads/phono-cartridge-equivalent-effective-tip-mass-master-list.41783/ ] [ https://www.patreon.com/posts/pravda-pro-massu-93731535 ]

and even with a bigmass budget MM carts like Technics EPC-270C-II (0.8mg) I see a real 48 kHz freqresponce: