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AT150EA-VM40ML Loading Experiments |
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patientot
Senior Member Joined: 28 Nov 2018 Location: USA Status: Offline Points: 1523 |
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Posted: 17 Feb 2022 at 3:47pm |
Thought I would post this here in case anyone finds this of interest. What follows are graphs detailing my loading experiments with an AT150EA cartridge body with a VMN40ML stylus. The 150EA body is very similar to the current VM700 series body, except the inductance is spec'd at 350mH (possibly slightly higher in reality) rather than the current 460mH. Total capacitance is ~180pf. I could probably knock out another ~30pf or so by switching to a different, shorter RCA cable but haven't done that yet and I'm not sure how much of a difference it would make. I ran into some trouble with my graphing programs and getting accurate inverse RIAA correction, so I got some help making the graphs. 47K: 39K: 36K: 32K: So far I think either 36K or 39K sounds the best with this cartridge, depending on one's taste's, in-room speaker response, etc.
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SL-1200 MK7 (modified) + Reflex M + PSU-1 used with AT150-40ML, AT VM95ML, Stanton 680mkII + Ogura, and Shure M35X cartridges.
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Fatmangolf
Moderator Group Joined: 23 Dec 2009 Location: Middlesbrough Status: Offline Points: 8960 |
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Thanks for this good work. There's less variation in the HF response and harmonic distortion than I expected.
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Jon
Open mind and ears whilst owning GSP Genera, Accession M, Accession MC, Elevator EXP, Solo ULDE, Proprius amps, Cusat50 cables, Lautus digital cable, Spatia cables and links, and a Majestic DAC. |
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patientot
Senior Member Joined: 28 Nov 2018 Location: USA Status: Offline Points: 1523 |
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Increasing or decreasing the capacitance in large amounts might affect the HF response more. Subjectively speaking, I didn't care for the sound at 47K. 36 or 39K sounds much better to me. Things like cymbals are less "in your face" when the cartridge is loaded down IMHO.
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SL-1200 MK7 (modified) + Reflex M + PSU-1 used with AT150-40ML, AT VM95ML, Stanton 680mkII + Ogura, and Shure M35X cartridges.
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Fatmangolf
Moderator Group Joined: 23 Dec 2009 Location: Middlesbrough Status: Offline Points: 8960 |
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Thank you. Your listening observations reveal more than the measurements do.
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Jon
Open mind and ears whilst owning GSP Genera, Accession M, Accession MC, Elevator EXP, Solo ULDE, Proprius amps, Cusat50 cables, Lautus digital cable, Spatia cables and links, and a Majestic DAC. |
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patientot
Senior Member Joined: 28 Nov 2018 Location: USA Status: Offline Points: 1523 |
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In this case the measurements were mostly done out of general curiosity and to confirm what I thought I was hearing.
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SL-1200 MK7 (modified) + Reflex M + PSU-1 used with AT150-40ML, AT VM95ML, Stanton 680mkII + Ogura, and Shure M35X cartridges.
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