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Vinyl Asylum Welcome Licorice Pizza (LP) lovers! Setup guides and Vinyl FAQ. |
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Vinyl Asylum Welcome Licorice Pizza (LP) lovers! Setup guides and Vinyl FAQ. |
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In Reply to: Has anyone experimented with using a heavier c'weight - to get it closer to the pivot housing? posted by andyr on November 25, 2023 at 00:33:31:
Nice looking metal working - I never would have thought that was homemade.
As for effect on the sound, by increasing the mass of the counterweight and moving it closer to the pivot, you have have reduced the effective (rotating) mass of the arm. That will raise the subsonic resonant frequency of the arm/cartridge combination, which may or may not be an improvement, depending on what frequency you've changed it to.
Ideally the resonant frequency should be above the warp range but below the audible range (target around 10 Hz). At that point, the arm should track warps without wobbling. (The wobbling can generate a large subsonic signal into your preamp, and if it's not filtered out, can pass through your amp to your speakers. If you see your cartridge wobbling or your woofers "pumping", you may have too low a resonant frequency in your arm/cartridge combo.)
My only other thought is that by increasing the counterweight's mass, you have increased the load on the arm's bearings. If there was any "chatter" in the bearings before, increasing the load could reduce that, and make the sound "clearer". (Personally I am skeptical of bearing "chatter" in tonearms having an effect during play, considering the large forces of the weight of the tonearm compared to the small forces imparted by the vibrating stylus, but I try to keep an open mind.)
Expectation bias or not, what matters is you like it. Nice work.
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Follow Ups
- RE: Has anyone experimented with using a heavier c'weight - to get it closer to the pivot housing? - JonM 04:01:17 11/25/23 (9)
- is there a formula to compute the actual change? - Story 05:49:06 11/27/23 (1)
- RE: is there a formula to compute the actual change? - JonM 11:34:48 11/27/23 (0)
- More on bearing chatter. - beach cruiser 17:16:46 11/25/23 (5)
- RE: More on bearing chatter. - JonM 05:04:14 11/26/23 (3)
- RE: More on bearing chatter. - beach cruiser 09:17:50 11/29/23 (0)
- I think it was most likely a disinformation on the Web about it that made the designers change it - Story 05:18:51 11/26/23 (1)
- RE: I have a Magnepan Unitrac ... - andyr 14:58:51 11/26/23 (0)
- RE: "SME had an arm with a knife edge horizontal bearing" ... - andyr 00:15:59 11/26/23 (0)
- RE: "Homemade"? ... - andyr 15:51:53 11/25/23 (0)
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