If you want MM cart sounding as clear as MC, I recommend 150 k/ 25 pF load instead of "standard" 47 k/250 pF - [ https://www.patreon.com/posts/70415214 ]
Please, how can you achieve a 25pF load on a cartridge if the cable from tonearm to preamp has roughly 100pF to 200pF capacitance, all by itself?
I measured the tonearm's internal cabling capacitance (C measured from the headshell wires to the tonearm's output connector) and got 30pF.
How does one achieve a zero capacitance tonearm to preamp cable?
Mine neither.
Nick's fits, as it's specifically designed to be built into a turntable, see https://www.diyaudio.com/community/...ono-stage-85-dba-sn-ratio.387375/post-7051721
Nick's fits, as it's specifically designed to be built into a turntable, see https://www.diyaudio.com/community/...ono-stage-85-dba-sn-ratio.387375/post-7051721
Yes, that's what I thought.
That means this will be a high budget, customization project.
Most MM carts are designed for the budget-conscious. Most bang for the buck.
I'm left wondering if the effort of redesigning your turntable to allow mounting of the phono preamp inside the turntable's plinth is worth it for optimizing a $200 cartridge like AT-VM95SH, or a vintage classic like Stanton 681EEE. How would you go about mounting the preamp in an SL1200? I guess it would have to be an opamp based PCB running on +/-15VDC @ roughly 10mA. Would it need its own power transformer? Or is the power transformer in the SL1200 capable of the extra load?
https://www.patreon.com/posts/72574505 and JFE2140 as input JFETS [ https://www.patreon.com/posts/74432039 ]
Slightly disagree with you, unless it´s a horribly cheap MC.
My Shure, although the V15-IV MR (less than 100 hours) is still outperformed even by a AT-PTG/II, and when I move to
WTL-Kauri, Ortofon Jubilee or Kiseki Blackheart, we are talking a totally different league.
That said, I still prefers the Shure or my Goldring 920-IGC with new shibata stylus on some music like old Moody Blues etc.,
but always have one turntable permanently mounted with a MC for newer recordings, especially Jazz 😉
I have a v15 m2 loaded at 100k // 150pf from cable.
I am making a preamp custom tuned for AT VM95 with microline stylus. Should be able to take on some of the best mc carts.
I am making a preamp custom tuned for AT VM95 with microline stylus. Should be able to take on some of the best mc carts.
I've improved reproduction with my Goldring 1012GX (more airy and clear highs) by shortening the cable as much as possible so the load is 120pF total (inc. tonearm wiring) with 56k.
Make simple analysis with equivalent LRC circuit in LTSpice to get idea what happens when C and R change
Make simple analysis with equivalent LRC circuit in LTSpice to get idea what happens when C and R change
Nick, did you publish measurement of end to end frequency response with the Ortofon test LP?
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